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An Improved Washing Machine

Abstract: AN IMPROVED WASHING MACHINE ABSTRACT The present disclosure discloses a washing machine (10). The washing machine (10) comprises a control system (28) configured to control a motor (22) operating a rotatable drum (16) to provide nine motions to the laundry. Each of first motion, second motion, third motion, fourth motion, fifth motion, sixth motion, seventh motion, eighth motion, and ninth motion are different from each other. The control system (28) controls the motor (22) to stop rotation of the rotatable drum (16) between each of the first motion, the second motion, the third motion, the fourth motion, the fifth motion, the sixth motion, the seventh motion, the eighth motion, and the ninth motion. The washing machine (10) is configured to operate in different levels of mechanical action in each type of motion in increasing manner to remove different type of dirt’s present in the laundry. [To be published with FIG. 1]

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Patent Information

Application #
Filing Date
14 October 2016
Publication Number
43/2019
Publication Type
INA
Invention Field
MECHANICAL ENGINEERING
Status
Email
shivani@lexorbis.com
Parent Application
Patent Number
Legal Status
Grant Date
2023-10-31
Renewal Date

Applicants

IFB Industries Limited
Verna Industrial Estate, Verna – 403722, Goa

Inventors

1. SHAIKH, Ahmed Kassam
Verna Industrial Estate, Verna – 403722, Goa
2. KUNDAIKER, Saiesh
Verna Industrial Estate, Verna – 403722, Goa
3. KERKAR, Diptesh
Verna Industrial Estate, Verna – 403722, Goa
4. NAIK, Pratiksha
Verna Industrial Estate, Verna – 403722, Goa
5. SHETYE, Balkrishna Madhukar
Verna Industrial Estate, Verna – 403722, Goa
6. NAG, Bijon
Verna Industrial Estate, Verna – 403722, Goa
7. TEWARI, Anubhav
Verna Industrial Estate, Verna – 403722, Goa

Specification

FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2016
COMPLETE SPECIFICATION TITLE OF THE INVENTION: AN IMPROVED WASHING MACHINE
Applicant : IFB Industries Limited
Nationality : Indian
Address : Verna Industrial Estate, Verna - 403722, Goa
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the nature of this invention and the manner in which it is to be performed.

AN IMPROVED WASHING MACHINE
FIELD OF INVENTION
[01] The present invention relates to a washing machine, and more particularly relates to a washing machine having nine motions.
BACKGROUND
[02] As known, typical washing machine normally contains a single duty cycle through-out a washing program. Generally, washing of laundry varies based on a type of fabric used. For example, a cotton fabric requires intensive washing actions; synthetic requires mild washing action, delicate laundry requires gentle washing action and same may be the case with silk and woolen type fabric. The intensive washing action may involve the risk of fabric damage and deterioration of washing machine moving parts.
[03] Typical washing machine makes use of six rotatable drum motions like massaging, disentangling, striking, swinging, rubbing, squeezing or filtrating motions. However, use of six rotatable drum motions may not be very effective due insufficient washing, rinsing and spinning cycles. Further, use of six rotatable drum motions may not remove different types of dirt such as clay stains, soot stains, carbon black stains, lentil stains, protein stains and so on in or on the cloth. Typically, the effectiveness of the rotatable drum motions depends on the mechanical action of the rotatable drum. For example, factors such as rotatable drum diameter, speed of rotation of the rotatable drum, the G factor, inner construction of the rotatable drum, running dip of the rotatable drum, weight of laundry in relation to rotatable drum, duration of treatment of the laundry and so on influence the mechanical action of the rotatable drum motions.
[04] Other factors that affect the effectiveness of the washing are performance of a motor used to run the rotatable drum. Typically, when the motor is operated in the tumbling operation for a long time, the motor may get heated and trip. Further, power consumed will be more and the control circuit will be over loaded.

[05] Hence to overcome all the above mentioned difficulties, there exists a need for an efficient and economical washing machine with real time monitoring and controlling the washing cycle from very gentle to intensive state of washing.
SUMMARY
[06] This summary is provided to introduce a selection of concepts, in a simplified manner, which is further described in the detailed description of the invention. This summary is neither intended to identify key or essential inventive concepts of the subject matter nor to define the scope of the invention.
[07] In order to overcome the problems in the prior art, a washing machine comprising nine motions is disclosed. The washing machine comprises a cabinet and a container provided in the cabinet to hold wash water therein. Further, the washing machine comprises a rotatable drum provided in the container to hold laundry. Further, the washing machine comprises a motor coupled to the container. The motor is adapted to rotate the rotatable drum. Further, the washing machine comprises a control system configured to control the motor to provide a first motion to the laundry based on a first movement of the rotatable drum. The control system is further configured to control the motor to provide a second motion to the laundry based on a second movement of the rotatable drum. The control system is further configured to control the motor to provide a third motion to the laundry based on a third movement of the rotatable drum. The control system is further configured to control the motor to provide a fourth motion to the laundry based on a fourth movement of the rotatable drum. The control system is further configured to control the motor to provide a fifth motion to the laundry based on a fifth movement of the rotatable drum. The control system is further configured to control the motor to provide a sixth motion to the laundry based on a sixth movement of the rotatable drum. The control system is further configured to control the motor to provide a seventh motion to the laundry based on a seventh movement of the rotatable drum. The control system is further configured to control the motor to provide an eighth motion to the laundry based on an eighth movement of the rotatable drum. The control system is further configured to control the motor to provide a ninth motion to the laundry based on a ninth movement

of the rotatable drum. The first motion, the second motion, the third motion, the fourth motion, the fifth motion, the sixth motion, the seventh motion, the eighth motion, and the ninth motion are different from each other. The control system controls the motor to stop rotation of the rotatable drum between each of the first motion, the second motion, the third motion, the fourth motion, the fifth motion, the sixth motion, the seventh motion, the eighth motion, and the ninth motion such that the laundry is dropped from a first angle followed by a second angle based on a reference position of 0° at a lowest point of the rotatable drum. The first angle is greater than the second angle.
[08] To further clarify the advantages and features of the present invention, a more particular description of the invention will follow by reference to specific embodiments thereof, which are illustrated in the appended figures. It is to be appreciated that these figures depict only typical embodiments of the invention and are therefore not to be considered limiting in scope. The invention will be described and explained with additional specificity and detail with the appended figures.
BRIEF DESCRIPTION OF THE DRAWINGS
[09] The invention will be described and explained with additional specificity and detail with the accompanying figures.
[10] Figure 1 illustrates a perspective view of a washing machine, in accordance with one embodiment of the present disclosure; and
[11] Figure 2A to 2I illustrate various rotatable drum motions at a pre-determined speed and laundry movement patterns, in accordance with one embodiment of the present disclosure.
[12] Further, those skilled in the art will appreciate that elements in the figures are illustrated for simplicity and may not have necessarily been drawn to scale. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the figures by conventional symbols, and the figures may show only those specific details that are

pertinent to understanding the embodiments of the present invention so as not to obscure the figures with details that will be readily apparent to those skilled in the art having the benefit of the description herein.
DETAILED DESCRIPTION
[13] The present disclosure discloses a washing machine comprising nine motions. The washing machine comprises a control system configured to control a motor operating a rotatable drum to provide nine motions to laundry. Each of a first motion, a second motion, a third motion, a fourth motion, a fifth motion, a sixth motion, a seventh motion, an eighth motion, and a ninth motion are different from each other. The control system controls the motor to stop rotation of the rotatable drum between each of the first motion, the second motion, the third motion, the fourth motion, the fifth motion, the sixth motion, the seventh motion, the eighth motion, and the ninth motion. In order to stop the rotatable drum, the motor uses rheostatic braking. The washing machine is configured to operate in different levels of mechanical action in each type of motion. Specifically, the washing machine operates in different motions in increasing manner to remove different type of dirt’s present in the laundry. In order to remove the dirt, the washing machine is turned off in between each motion to change the direction of rotation of the rotational rotatable drum. The washing machine is turned off for better application of detergent to clothes and in turn reduces different load on the motor.
[14] Embodiments of the present invention will be described below in detail with reference to the accompanying FIGS 1-2I.
[15] Referring to FIG. 1, an exploded perspective view of a washing machine 10 is shown, in accordance with one embodiment of the present disclosure. The washing machine 10 comprises a cabinet 12 configured to define an exterior appearance of the washing machine 10. The cabinet 12 comprises a container 14 to hold wash water therein. The container 14 comprises a rotatable drum 16. The washing machine 10 further comprises a door 18 is provided at an opening 20 of the cabinet 12. It should be understood that a user of the washing machine 10 may open the door 18

to load laundry into the cabinet 12. Specifically, the user may load the laundry in the rotatable drum 16.
[16] Further, the washing machine 10 comprises a motor 22. The motor 22 rotates the rotatable drum 16. Further, the washing machine 10 comprises a detergent drawer 24, and a control panel 26, both disposed at the top of the front of the cabinet 12. The user may select a course of the washing machine 10 via the control panel 26 or recognize information relating to the washing machine 10. For example, the user may operate the control panel 26 to select a particular washing course or to adjust operational conditions of each cycle of the washing machine 10.
[17] Furthermore, the washing machine 10 comprises a control system 28. In one example, the control system 28 may be implemented as one or more microprocessors, microcomputers, microcontrollers, digital signal processors, central processing units, state machines, logic circuitries, and/or any devices that manipulate signals based on operational instructions. Further, the control system 28 may receive data related to various parameters of the washing machine 10 and control washing cycles of the washing machine 10.
[18] In the present embodiment, the washing machine 10 is configured to rotate in nine different motions i.e., a first motion, a second motion, a third motion, a fourth motion, a fifth motion, a sixth motion, a seventh motion, an eighth motion, and a the ninth motion. It should be understood that each of the first motion, the second motion, the third motion, the fourth motion, the fifth motion, the sixth motion, the seventh motion, the eighth motion, and the ninth motion are different from each other and the rotatable drum 16 movements is different for each of the nine motions.
[19] Now, referring to FIG. 2A-2I, different driving motions of the rotatable drum 16 configured to achieve the above various movement patterns of the laundry are explained. FIG. 2A illustrates a diagram of a rolling motion. In the rolling motion, the motor 22 continuously rotates the rotatable drum 16 in a predetermined direction and the laundry located on the inner circumferential surface of the rotatable drum 16 rotates along the rotation direction of the rotatable drum 16 is dropped from the position at an angle of approximately less than 90° with respect to the rotation rotatable drum of the rotatable drum 16 to the lowest point of the rotatable drum. In

the rolling motion, the load falling angle may be less than 90 degrees and the rotatable drum 16 rotation may be complete in both clockwise and counter clockwise direction at an RPM range of about 40 to 45 RPM.
[20] FIG. 2B illustrates a diagram of a tumbling motion. In the tumbling motion, the motor 22 continuously rotates the rotatable drum 16 in a predetermined direction and the laundry located on the inner circumferential surface of the rotatable drum 16 is dropped from the position of approximately 90° to 110° with respect to the rotation direction of the rotatable drum to the lowest point of the rotatable drum 16. In the tumbling motion, the load falling angle may be in a range of about 90 degrees to 135 degrees and rotation of the rotatable drum 16 may be complete in both clockwise and counter clockwise direction at an RPM range of about 50 to 55 RPM.
[21] FIG. 2C is a diagram of a step over motion. In the step over motion, the motor 22 rotates the rotatable drum 16 in a predetermined direction and the laundry located at the inner circumferential surface of the rotatable drum 16 is controlled to be dropped to the lowest point of the rotatable drum 16 from the highest point (approximately 180°) with respect to the rotation direction of the rotatable drum 16. In the step over motion, the load falling angle may be 180 degrees and the rotatable drum 16 rotation may be complete in both clockwise and counter clockwise direction at an RPM range of about 55 to 60 RPM.
[22] Referring to FIG. 2D, a cradle motion of the rotatable drum 16 is illustrated. In the cradle motion, the motor 22 rotates the rotatable drum 16 in clockwise and counter-clockwise directions alternatively and the laundry is dropped at a position of approximately less than 90° with respect to the rotation direction of the rotatable drum 16. In the cradle motion, the load falling angle may be 45 degrees and the rotation of the rotatable drum 16 may be 45 degrees to 90 degrees in both clockwise and counter clockwise direction at an RPM range of about 30 to 35 RPM.
[23] FIG. 2E illustrates a scrub motion. In the scrub motion, the load falling angle may be in a range of 110 degrees to 135 degrees and the rotatable drum 16 rotation may be in a range of 110 degrees to 135 degrees in both clockwise and counter clockwise direction at an RPM range of about 55 to 60 RPM. The predetermined speed may be the Revolutions per Minute (RPM).

[24] FIG. 2F illustrates a swing motion. In the swing motion, the motor 22 rotates the rotatable drum 16 in clockwise and counter-clockwise directions alternatively and the laundry is dropped at a position of approximately less than 90° with respect to the rotation direction of the rotatable drum 16. In the swing motion, the load falling angle may be 90 degrees and the rotatable drum rotation may also be 90 degrees in both clockwise and counter clockwise direction at an RPM range of about 40 to 45 RPM.
[25] FIG. 2G illustrates a combination of scrub and swing motions. In the combination of scrub and swing motions, the load falling angle may be 90 degrees in a clockwise direction and 135 degrees in counter clockwise direction. The rotatable drum 16 rotation may be 90 degrees in clockwise direction and 135 degrees in counter clockwise direction at an RPM range of about 40 RPM to 45 RPM for 90 degrees rotation and 50 to 60 RPM for 135 degrees rotation.
[26] FIG. 2H illustrates the combination of step and roll motions. In the step and roll motions, the load falling angle may be less than 90 degrees clockwise direction, 180 degrees in clockwise direction and may be repeated. The rotatable drum 16 rotation may be less than 90 degrees clockwise direction, 180 degrees in clockwise direction and may be repeated at an RPM range of about 50 RPM to 60 RPM and 45 RPM for less than 90 degrees rotation in clockwise direction.
[27] FIG. 2I illustrates a squeeze motion. In the squeeze motion, the rotatable drum rotation may be complete in both clockwise and counter clockwise direction at an RPM range of about 90 to 100 RPM.
[28] In one embodiment, the control system 28 is configured to control the motor 22. In the current embodiment, the control system 28 controls the motor 22 to provide nine different motions. Specifically, the control system 28 controls the motor 22 to provide a first motion to the laundry based on a first movement of the rotatable drum 16. The control system 28 controls the motor 22 to provide a second motion to the laundry based on a second movement of the rotatable drum 16. The control system 28 controls the motor 22 to provide a third motion to the laundry based on a third movement of the rotatable drum 16. The control system 28 controls the motor 22 to provide a fourth motion to the laundry based on a fourth movement of the rotatable drum 16. The control

system 28 controls the motor 22 to provide a fifth motion to the laundry based on a fifth movement of the rotatable drum 16. The control system 28 controls the motor 22 to provide a sixth motion to the laundry based on a sixth movement of the rotatable drum 16. The control system 28 controls the motor 22 to provide a seventh motion to the laundry based on a seventh movement of the rotatable drum 16. The control system 28 controls the motor 22 to provide an eighth motion to the laundry based on an eighth movement of the rotatable drum 16. The control system 28 controls the motor 22 to provide a ninth motion to the laundry based on a ninth movement of the rotatable drum 16. The control system 28 controls the motor 22 such that each of the first motion, the second motion, the third motion, the fourth motion, the fifth motion, the sixth motion, the seventh motion, the eighth motion, and the ninth motion are different from each other.
[29] In one example, each of the first motion, the second motion, the third motion, the fourth motion, the fifth motion, the sixth motion, the seventh motion, the eighth motion, and the ninth motion are provided in increasing manner to remove various type of dirt present on clothes or laundry.
[30] In the current embodiment, the control system 28 controls the motor 22 to stop rotation of the rotatable drum 16 between each of the first motion, the second motion, the third motion, the fourth motion, the fifth motion, the sixth motion, the seventh motion, the eighth motion, and the ninth motion. In other words, the control system 28 is configured to provide off-time or idle time in between each motion. As the direction of the motion changes within the wash cycle and as each motion changes from one motion to another motion, soaking of the laundry may be carried out by allowing off time or idle time in between each motion. Further, between each motion, the laundry is dropped from a first angle followed by a second angle based on a reference position of 0° at a lowest point of the rotatable drum shown in FIG. 2A to FIG. 2I. It should be understood that the first angle is greater than the second angle. By allowing idle time between each motion, the laundry is soaked in the water. When the laundry is soaked, stains in or on the laundry may come in contact with the water and quality of washing may be improved. In one embodiment, the control system 28 is configured to change the level of water and make use of different motions intermittently, to change the mechanical action level onto the laundry. The control system 28 may change the level of water by providing sufficient idle time or off time in between each subsequent motion or

combination of motions, for example during the stepping motion, swing motion, scrub motion and the like. By allowing the laundry to come in contact with the water inside the rotatable drum, the stains are removed effectively and quality of wash is improved.
[31] Further, the control system 28 may be configured to perform a dry friction and a wet friction utilized in the above described motions for improving wash quality. The dry friction is a method in which the laundry may go through higher load falling angle within the rotatable drum 16, and may get dry due to more exposure to the pores of the rotatable drum 16. In other words, the higher falling angle is indicative of the first angle. The wet friction may be a method in which the laundry may experience lower falling angle, and may remain wet due to less exposure to the pores of the rotatable drum 16 within the rotatable drum 16. In other words, the lower falling angle is an indicative of the second angle.
[32] In one embodiment, the specific motion or the combination of motions may be implemented for different activity of washing the laundry. For example, a combination of soak and cradle motions may be used for soaking the laundry. In other example, a combination of roll over and tumble over motions may be used to apply detergent. In other example, a scrub motion may be used to remove surface soil on the laundry. In other example, a combination of stepping and swing motions may be used to remove deep dirt on the laundry. In other example, a combination of roll over and tumble over motions is used for applying the detergent solution uniformly. In other example, a filtration motion may be used for dewatering. In other example, stepping and filtration may be used for rinsing. In other example, a squeeze motion may be used for squeezing water out of laundry. In other example, an anti-crease motion may be used for detangling the laundry. In other example, stepping and filtration motions may be used for rinsing in order to allow removal of detergent and dirt from the laundry. Further, the cradle motion may be used for rinsing the laundry. Specifically, the cradle motion is used reduce the impact of mechanical actions on the clothes or the laundry.
[33] Further, the specific motion or the combination of motions may be implemented for different activity of washing the laundry as described above may be described in detail by providing an example of complete washing cycle. The complete washing cycle may begin with the

first phase as a pre-wash phase. In the pre-wash phase, the water is filled up with the tumble over motion at a predefined duty cycle. The pre-wash phase can be selected by user and the prewash detergent may get added into the rotatable drum while water is being filled up. Further, the drain step may be introduced for a specific time, where the washed water containing dirt and detergent is drained off. The second phase may be the intermediate spin phase, where the laundry is spun at high RPM in a range of about 400-800rpm. The intermediate spin phase may help in removing the detergent from laundry. Further, the drain pump may be switched on to drain off the detergent water. The third phase may be main wash phase, where actual washing of laundry may begin. The main wash phase may start with water being filled up within the rotatable drum along with main wash detergent and washing may be carried out at a predefined time and duty cycle. Further, the specific motion or the combination of motions that have been described in FIG. 2A to 2H above may be implemented in sequence. The fourth phase may be soak phase, where the rotatable drum may remain stationary. Further, the laundry remains soaked in the water. Furthermore, the user may select stationary timing. The soak phase may not have rotatable drum rotation and may also be skipped if not selected by the user. The fifth phase may be steam phase, where steam may be injected into the rotatable drum along with tumble over motion with a predefined duty cycle and time. Steam is generated through steam generator mounted inside the washing machine. Further, heating step where in the water may be heated to a predefined temperature. The temperature may be selected by the customer/user or the control system 28. The heater phase may heat up the water using electric heater fitted inside the rotatable drum. Once the required water temperature is achieved, the heater supply is turned off by the controller. The sixth phase may be reheating phase, where the water temperature may be monitored and as the water temperature drops below the required value, then heater is turned on again to maintain it at required level. The seventh phase may be normal wash phase, where the motor to rotate rotatable drum may operate with a predefined duty cycle and time based on the options selected by the user and by the amount of laundry load inside the rotatable drum. Further, the water may be cooled down by taking water inside the rotatable drum, if the temperature is above some threshold limit and the water inside the container may be filled till the temperature reaches to safe level recommended for draining. Further, the water may be drained out from the container or rotatable drum. The eighth phase may be intermediate spin phase again as described above. The ninth phase may be extra rinse phase, where fresh water may be filled inside the rotatable drum to rinse the washed laundry. The rinsing may

be carried out for a predetermined time and duty cycle. The extra rinse phase may be selected by the customer/user or the control system 28. Further, the water may be drained out from the container or rotatable drum. The tenth phase may be intermediate spin phase again as described above. The eleventh phase may be extra rinse phase again as described above. The twelfth phase may be intermediate spin phase again as described above. The thirteenth phase may be extra rinse phase again as described above. The fourteenth phase may be intermediate spin phase again as described above. The fifteenth phase may be normal rinse phase same as that of extra rinse phase as described above. The sixteenth phase may be intermediate spin phase again as described above. The seventeenth phase may be rinse additive phase, where fresh water may be filled inside the rotatable drum to rinse the washed laundry. Further, the rinse additive phase may include addition of softener or additives to the laundry. The rinsing may be carried out at a predetermined time and duty cycle. The eighteenth phase may be hot rinse phase, where the rinse water may be heated for a predefined temperature. Further the user may also skip the hot rinse phase, if not selected. The nineteenth phase may be rinse hold phase, where laundry may remain idle in water with no rotation of motor. Further, the laundry may be stationary till the user releases the rinse hold phase through control panel. Further, water may be drained out from the container or rotatable drum. The twentieth phase may be final spin phase, where the laundry is spun at rpm set by the user or the control system 28. Further the final spin phase may squeeze the water from laundry and water may be drained out. The last phase may be the anti-crease phase where, the rotatable drum may be rotated at a predefined RPM and duty cycle. Further, the anti-crease phase may help in reducing the creasing of laundry by loosening the creasing during rotation.
[34] Further, the control system 28 may be configured to control the washing cycle in such a way that only few motions or all the motions in the sequence may be implemented based on the user input or the parameters described above. Thus, depending on the each motion described above the intensity of the mechanical action may be increased. Once the laundry is placed within the rotatable drum 16, then the subsequent motion or the combination of motions may be implemented based on the various parameters like water ring formation, foam detection, imbalance detection, laundry type, laundry weight, error state generation, motor braking, RPM of each motion, turbidity or soil or dirt within the rotatable drum and the like. For example, when the stained cotton laundry is placed within the washing machine 10, then the control system 28 may be configured to start

with one or more combination of motions like tumble over motion followed by roll over motion, step over motion, cradle motion, scrub motion and swing motion and the like.
[35] In another embodiment of the present invention, the control system 28 may be configured to perform the dry friction and wet friction methods utilized in the above described motions. For example, the protein stains or any dense stains that may dissolve within the cloth are very difficult to be removed. The control system 28 may be configured to intentionally start the dry friction to remove the dense stain by creating a brushing action, as a result of which the laundry may face higher load falling angle that increases the mechanical action on the laundry and the chances of removal of protein stains or any dense stains on or in the cloth may be very high compared to the traditional way of washing. Further, the mechanical action is implemented based on the amount of water used for washing. For example, when the laundry is delicate and does not require more mechanical action, then the control system 28 intentionally uses the wet friction method to wet the cloth so as to reduce the mechanical action and reduce the laundry deterioration.
[36] Further, in accordance with an exemplary embodiment, the control system 28 may be configured to trigger the dry friction upon detecting the temperature of wash water entering the rotatable drum. This aspect is of particular significance in wash conditions where the temperature of inlet water stream is usually higher than the average temperature, for e.g. in tropical, semi-arid geographical areas. The control system 28 is thus advantageous in avoiding saturation of certain types of stains (for e.g. protein stains) by triggering dry friction, which would otherwise saturate in the cloth fabric owing to increased temperature in the rotatable drum.
[37] In another embodiment of the present invention, the control system 28 may be configured to detect the imbalance state within the rotatable drum. The imbalance state may be a state in which the distribution of the laundry within the rotatable drum may be uneven or the laundry may be on any one side of the rotatable drum or the like. The imbalance state may be measured based on the various methods, one of the method to detect imbalance may be, the fluctuation of current by the motor, like once the imbalance state is occurred, the motor 22 may require to deliver more and more torque to rotate the rotatable drum 16 as a result of which the consumption of current may

not be stable and may fluctuate, and the user may be notified about the imbalance state by the control system 28.
[38] In another embodiment of the present invention, the control system 28 may be configured to measure and control water management process. The water management process as described in the embodiments of the present invention relates to the process in which set level of water and reset level of water of required pressure frequencies for every program may be carried out. The set level and reset level may be defined based on type of laundry wash program and other features such as economy mode, water plus mode, cool down mode and the like. The set level of required pressure frequency may be used, where the maximum level of water required for washing laundry is achieved like for example cotton fabrics may require less water level, synthetic fabrics may require medium water level and wool or delicate fabrics may require high water level. The reset level of required pressure frequency may be used, where minimum water level required for washing of laundry is achieved, if water level goes below the required level then the refilling of water may be carried out. Each subsequent motion or the combination of motions may require different levels of water for improving wash quality.
[39] Further in accordance with the above embodiment, the water management process that includes the water filling stages during laundry wash cycle may be as follows like for example, at step one, the wash program may be started based on the commands given by the user or the control system 28. At step two, the drain pump installed within the machine may be switched on. At step three, the pressure switch frequency range may be checked. Further, the control system 28 may give the water set level for the laundry based on various parameters like pressure switch frequency and the drain pump may be running on till the zero level is obtained. At step four, the required pressure frequency at zero level may be obtained. At step five, the water may fill till the set level may be achieved. At step six, the tumble rotation may be started after about 2 liters of pressure switch frequency is sensed. At step seven, the water filling and tumble motion may be continued till the set level is reached. At step eight, the control system 28 may turn off the water filling after the water set level is reached and sensed. At step nine, the tumbling motion and sensing of pressure switch frequency level may be on. At step ten, the pressure switch frequency may again be checked or measured. At step eleven, the reset level pressure switch frequency may be sensed due to the

absorption of water. At step twelve, again the water refilling may be started till the required water set level is reached or achieved. At step thirteen, again the tumbling motion and sensing of pressure switch frequency level may be on. At step fourteen, the control system 28 may again turn off the water filling after the water set level is reached and sensed. At step fifteen, repetitions of steps eleven to fourteen may be carried out till the required set level is achieved for wash program.
[40] In another embodiment of the present invention, the main wash program may include the specific motion or the combination of motions as follows for example, the roll over motion may include load angle of less than 90 degrees with complete rotatable drum rotation. The working cycle for roll over motion may include the working operation like 12 seconds in ON mode towards clockwise direction, 4 Seconds in OFF mode and then 12 seconds in ON mode towards counter clockwise direction and again in OFF mode for 4 seconds with an RPM in a range of about 40RPM-45RPM. The RPM may be fine-tuned based on the load falling angle. The total time allotted to the roll over motion may be 32 seconds with a duty cycle of 75 percent. The tumble over motion may include load angle in a range of 90 degrees to 135 degrees with complete rotatable drum rotation. The working operation of tumble over motion may include 12 seconds in ON mode towards clockwise direction, 4 Seconds in OFF mode and then 12 seconds in ON mode towards counter clockwise direction and again in OFF mode for 4 seconds with an RPM in a range of about 50RPM-55RPM. The RPM may be fine-tuned based on the load falling angle. The total time allotted to the tumble over motion may be 32 seconds with a duty cycle of 75 percent.
[41] Further, in accordance with the above embodiment, the step over motion may include load angle of 180 degrees with rotatable drum rotation of 180 degrees. The working operation for step over motion may include 2 seconds in ON mode towards clockwise direction and repeat the same for 4 more times and 4 seconds in OFF mode and then 2 seconds in ON mode towards counter clockwise direction and repeat the same for 4 more times with an RPM in a range of about 55RPM-60RPM. The RPM, angle and number of times rotation will be fine-tuned based on temperature rise. The total time allotted to the step over motion may be 28 seconds with a duty cycle of 80 to 90 percent. The cradle motion may include load angle of 45 degrees with rotatable drum rotation of 45 degrees to 90 degrees. The working operation for cradle motion may include 1 second in ON mode towards clockwise direction, 1 second in OFF mode and then 1 second in ON mode towards

counter clockwise direction and again in OFF mode for 1 second with an RPM in a range of about 30RPM-35RPM. The RPM and loading angle to be fine-tuned based on the load movement. The total time allotted to the cradle motion may be 40 seconds with a duty cycle of 50 percent.
[42] Further, the scrub motion may include load angle in a range of 110 degrees to 135 degrees with rotatable drum rotation of 110 degrees to 135 degrees. The working operation for scrub motion may include 2 seconds in ON mode towards clockwise direction and repeat the same for 4 more time and 4 seconds in OFF mode and then 2 seconds in ON mode towards counter clockwise direction and repeat the same for 4 more times with an RPM in a range of about 55 RPM-60 RPM. The RPM, angle will be fine-tuned based on load falling angle. The total time allotted to the scrub motion may be 28 seconds with a duty cycle of 80 to 95 percent. The swing motion may include load angle of 90 degrees with rotatable drum rotation of 90 degrees. The working operation for swing motion may include 2 seconds in ON mode towards clockwise direction and repeat the same for 4 more time and 4 seconds in OFF mode and then 2 seconds in ON mode towards counter clockwise direction and repeat the same for 4 more times with an RPM in a range of about 40RPM-45RPM. The RPM, angle will be fine-tuned based on load falling angle. The total time allotted to the scrub motion may be 28 seconds with a duty cycle of 80 to 95 percent.
[43] Further, the combination of scrub and swing motions may include load angle 90 degrees towards clockwise direction and 135 degrees towards counterclockwise direction with similar angle of rotatable drum rotation. The working operation for combined scrub and swing motions may include for 90 degrees clockwise direction, 2 seconds in ON mode towards clockwise direction and repeat the same for 4 more time and 4 seconds in OFF mode and then 135 degrees counter clockwise direction, 2 seconds in ON mode towards counter clockwise direction and repeat the same for 4 more times with an RPM in a range of about 55RPM-60RPM for 135 degrees counter clockwise and 40RPM to 45RPM for an angle of 90 degrees in clockwise direction. The RPM, angle will be fine-tuned based on load falling angle. The total time allotted to the combined motion may be 28 seconds with a duty cycle of 80 to 95 percent.
[44] Furthermore, the combination of step over and roll over motions may include a load angle of 180 degrees towards clockwise direction, less than 90 degrees clock wise direction and repeat

with similar angle of rotatable drum rotation. The working operation for the combined step over and roll over motions may include the loading angle of 180 degrees in clockwise direction, 2 seconds in ON mode towards clockwise direction and for 90 degrees in clockwise direction, 6 seconds in ON mode and 4 seconds and repeat the same one more time towards clockwise direction flowed by same in counter clockwise direction with an RPM in a range of about 55RPM-60RPM for 180 degrees in counter clockwise and 45RPM for 90 degrees in clockwise direction.. The total time allotted to the combined motion may be 48 seconds with a duty cycle of 60 to 65 percent. The squeeze motion may include complete load angle towards clockwise direction and counterclockwise direction with similar angle of rotatable drum rotation. The working operation for squeeze motion may include 10 seconds in ON mode towards clockwise direction and 4 seconds in OFF mode and then 10 seconds in ON mode towards counter clockwise direction and repeat the same for 4 more times with an RPM in a range of about 90RPM-100RPM. The total time allotted to the squeeze motion may be 24 seconds.
[45] In another embodiment of the present disclosure, the control system 28 may be configured to provide variety of motions that may be useful for a specific laundry type, like cotton being strong fabric, can be used for all the motions mentioned above. Cradle motion, roll over motion and swing motion which are medium to gentle in action may be implemented for synthetic and mixed fabrics. Cradle motion may be implemented for silk and woolen fabric for delicate wash.
[46] Best mode example:
[47] The following shows a test data using conventional washing machine. Referring to Table 1 shown below, test results of the conventional washing machine is shown.
[48] Table 1: Conventional Washing machine test data for a normal wash

White Shirt - Dark Blue Pink T Shirt- Grey T Shirt - Trouser Jet Silk Top Cotton kurta
Linen Shirt - Cotton Cotton Blend 70*/. cotton 30*/. Polyster Black-Cotton with embroidery
Initial Reflectance Value -Colour 84.136 3.599 6.941 13.218 1.7S3 11.441 2.721
Reflectance Value after 10 washes 74.923 3.534 6.834 12.655 2.349 10.655 2.866
Initial Weight 287.32gm 226.90 gm 196.21 gm 110.23 gm 360.06 gm 119.05 gm 85.79 gm
Weight after
10 Washes 285.89 gm 2283.76gm 198.88 gm 107.88gm 364.54 gm 118.15 gm 84.46gm
Initial Softness (ref*) 5 5 5 5 5 5 5
Softness after 2 1 3 2 2
10 Washes
2

2

Pilling after 5 5 5 5 5 5 5
10 Washes
Pilling after 10 washes 4 2 3 4 3 4 3
InitialSheen NA 5 5 5 5 5 5
Values (ref*)
Sheen after 10 Wishes 3 2 2 2 1 2
Table 2

Referring to Table 3, test data of a cradle wash as per the present disclosure is shown. Table 3: Cradle wash

WhiteShirt - Dark Blue Pink T Shirt- Grey T Shirt - Trouser Jet Silk Top Cotton kurta
Linen Shirt -Cotton Cotton Blend 70%cotton 30% Polyter Back - Cotton with embroidery
Initial Reflectance Value -Colour 83.561 3.54 7. 108 13.582 1.777 11.534 2.711
Reflectance Value
after 10 Washes 80.537 3.308 6.998 12.491 1.816 10.137 2.803
Initial Weight 282.36 gm 222.41 gm 186.77 gm 108.24 gm 349.91 gm 119.36 gm 86.37 gm
Weight after10 Washes 283.57 gm 223.83 gm 189.83gm 107.24 gm 353.19 gm 120.57 gm 85.41 gm
Initial Softness (ref*) 5 5 5 5 5 5 5
Softness after 10 Washes 4 4 4 4 4 4 4
Initial Pilling 5 5 5 5 5 5 5
Value (ref*)
Pilling after 10 washes 5 5 5 4 4 5 5
Initial Sheen N.A 5 5 5 5 5 5
Values (ref*)
Sheen after 10 Washes 4 4 4 4 4 4
Table 3
Now referring to Table 4, the summary of color change for each of the wash is shown.
Table 4: Summary of change of color

After 10 Type of W hite Dark Blue Pink T GreyT Shirt - Trouser Silk Top Cotton Kurta Average of
Washes Washing Shirt - Shirt Shirt - 70% cotton Jet Black- with Test Results
Linen Cotton Cotton 30% Polyster Cotton embroidery
Blend
Change of Colour Hand Wash 0.91% 0.07% 0,13", 0.61% o.51% 1.11% 0.24% 0.51%
Normal Wash 9.21% 0.06% 0.11% 0.56% 0 57*. 0.79% 1.64*4
Swirl Wash 7.09% 0.15% 0.09% 0.33% 0.32% 1.54% 0.26% 1.40%
Cradle Wash 3.02% 0.23% 0.11% 1.09% 0. 04% 1.40% 0.09% 0.155%
Table 4
Now referring to Table 5, the summary of weight gain or loss for each of the wash is shown.

Table 5: Summary of weight gain/loss

After 10
Washes Type of Washing White
Shirt-
LineI Dark Blue
Shirt -Cotton PinkT Shirt-Cotton BIend Grey Shirt -70% colton 30%Polyster Trouser Jet Back -Cotton Silk Top Colton Kurt a
with embroidery Average of Test Results
Weight Gain/
Loss Hand Wash 3.21% 4.39% 1.68% 4.06% 4.10% 5.81% 1.75%
Normal Wash 0.50% 0.81% 1.34% 2.18% 1.23% 0.76% 1.57%
Swirl Wash 0.60% 0.55% 1.15% 3.09% 259% 0.74% 2.22%
Cradle Wash 0.43% 0.63% 1.61% 0.93% 0.93% 1.00% 1.12%
Table 5
[57] Now referring to Table 6, the summary of piling or roughness for each of the wash is shown.
[58] Table 6: Summary of piling or roughness

Table 6
Now referring to Table 7, the summary of sheen/shine for each of the wash is shown. Table 7: Summary of sheen/shine

After 10 Washes Type of White Shirt Dark Blue PinkT Grey Trouser Jet silk Top Cotton kurti Average of
Washing - Linen Shirt - Shirt - Shirt - 70% Black- with Test
Cotton Cotton Cotton 30% Cotton embroidery Results
Blend Polyster
Pilling Handwash 3 4 3 1 2 2 3 2.57
Normal Wash 4 2 3 4 3 4 3 329
Swirl Wash 4 4 4 5 4 2 3 3.71
Cradle Wash 5 5 5 4 4 5 5 4.71

Alter 10 Washes Type of Darkk Blue PinkT Grey T Trouser Jet Silk Top Cotton kurta Average of
Washing Shirt - Shirt - Shirt - 70% Back- with Test
Cotton Cotton cotton 30% Cotton embroidery Results
Blend Polyster
Sheen /Shine Hand Wash 2 1 1 2 2 1 1.50
Normal Wash 3 2 2 2 I 2 2.00
Swirl Wash 3 3 3 3 4 3 3.17
Cradle Wash 4 4 4 4 4 4 4.00

Table 7
[61] Now referring to Table 8, the summary of softness for each of the wash is shown. [62] Table 8: Summary of softness

After 10 washes Type of WhiteShirt Dark Blue Pink T GreyT Trouser Jet Silk Top Cottonkurta
Averageof
Washing - Line Shirt- Shirt- Shirt - 70% Black with Test
Cotton Cotton Cotton 30% Cotton embroidery Result
Blend Polyster
Softness hand Wash 2 3 2 3 2 2 1 2.14
Normall Wash 2 2 1 3 2 2 2 2.00
Swirl Wash 2 2 3 2 2 2 3 2.28
Cradle Wash 4 4 4 4 4 4 4 4.00
Table 8
[63] As evident from the above disclosure, the washing machine 10 based on various parameters may be advantageous to provide: increased mechanical action, reduction in the washing time, better wash quality, improvised rinsing of the laundry, improved reliability of washing machine and allied components, reduction in detergent utilization, varied ranges of mechanical action based on the laundry type, better removal of dense dirt like protein stains, etc. and others.
[64] While specific language has been used to describe the invention, any limitations arising on account of the same are not intended. As would be apparent to a person skilled in the art, various working modifications may be made to the method in order to implement the inventive concept as taught herein.
[65] The figures and the foregoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, order of processes described herein may be changed and are not limited to the manner described herein. Moreover, the actions of any flow diagram need not be implemented in the order shown;

nor do all of the acts need to be necessarily performed. Also, those acts that are not dependent on other acts may be performed in parallel with the other acts. The scope of embodiments is by no means limited by these specific examples.

WE CLAIM:
1. A washing machine (10), comprising: a cabinet (12),
a container (14) provided in the cabinet (12) to hold wash water therein, a rotatable drum (16) provided in the container (14) to hold laundry, a motor (22) coupled to the container (14), wherein the motor (22) is adapted to rotate the rotatable drum (16),
a control system (28) configured to control the motor (22) to:
provide a first motion to the laundry based on a first movement of the rotatable drum (16);
provide a second motion to the laundry based on a second movement of the rotatable drum (16);
provide a third motion to the laundry based on a third movement of the rotatable drum (16);
provide a fourth motion to the laundry based on a fourth movement of the rotatable drum (16);
provide a fifth motion to the laundry based on a fifth movement of the rotatable drum (16);
provide a sixth motion to the laundry based on a sixth movement of the rotatable drum (16);
provide a seventh motion to the laundry based on a seventh movement of the rotatable drum (16);
provide an eighth motion to the laundry based on an eighth movement of the rotatable drum (16); and
provide a ninth motion to the laundry based on a ninth movement of the rotatable drum (16),
wherein the first motion, the second motion, the third motion, the fourth motion, the fifth motion, the sixth motion, the seventh motion, the eighth motion, and the ninth motion are different from each other, and

wherein the control system (28) controls the motor (22) to stop rotation of the rotatable drum (16) between each of the first motion, the second motion, the third motion, th e fou rth mo ti o n , t he f ift h mo ti on , the s ixt h mot ion , th e s ev enth motion, the eighth motion, and the ninth motion such that the laundry is dropped from a first angle followed by a second angle based on a reference position of 0° at a lowest point of the rotatable drum (16), and wherein the first angle is greater than the second angle.
2. The washing machine (10) as claimed in claim 1, the wherein the motor (22) uses rheostatic braking to stop the rotatable drum (16).
3. The washing machine (10) as claimed in claim 1, wherein the control system (28) operates the motor (22) to drop the laundry from the first angle based on a pre-defined temperature of the rotatable drum (16).
4. The washing machine (10) as claimed in claim 1, wherein the control system (28) operates the motor (22) to drop the laundry from the second angle based on water present in the rotatable drum (16).
5. A method of treating laundry in a washing machine (10), wherein the washing machine (10) comprises a rotatable drum (16) operated by a motor (22), the method comprises steps of:
providing a first motion to the laundry based on a first movement of the rotatable drum (16);
providing a second motion to the laundry based on a second movement of the rotatable drum (16);
providing a third motion to the laundry based on a third movement of the rotatable drum (16);
providing a fourth motion to the laundry based on a fourth movement of the rotatable drum (16);
providing a fifth motion to the laundry based on a fifth movement of the rotatable drum (16);

providing a sixth motion to the laundry based on a sixth movement of the rotatable drum (16);
providing a seventh motion to the laundry based on a seventh movement of the rotatable drum (16);
providing an eighth motion to the laundry based on an eighth movement of the rotatable drum (16); and
providing a ninth motion to the laundry based on a ninth movement of the rotatable drum (16),
wherein the first motion, the second motion, the third motion, the fourth motion, the fifth motion, the sixth motion, the seventh motion, the eighth motion, and the ninth motion are different from each other, and
wherein the rotatable drum (16) is made to stop in between each of the first motion, the second motion, the third motion, the fourth motion, the fifth motion, the sixth motion, the seventh motion, the eighth motion, and the ninth motion such that the laundry is dropped from a first angle followed by a second angle based on a reference position of 0° at a lowest point of the rotatable drum (16), and wherein the first angle is greater than the second angle.
6. The method as claimed in claim 5, the wherein the motor (22) uses rheostatic braking to stop the rotatable drum (16).
7. The method as claimed in claim 5, wherein the laundry is dropped from the first angle based on a pre-defined temperature of the rotatable drum (16).
8. The method as claimed in claim 5, wherein the laundry is dropped from the second angle based on water present in the rotatable drum (16).

Documents

Orders

Section Controller Decision Date

Application Documents

# Name Date
1 201621035079-IntimationOfGrant31-10-2023.pdf 2023-10-31
1 Power of Attorney [14-10-2016(online)].pdf 2016-10-14
2 201621035079-PatentCertificate31-10-2023.pdf 2023-10-31
2 Form 5 [14-10-2016(online)].pdf 2016-10-14
3 Form 3 [14-10-2016(online)].pdf 2016-10-14
3 201621035079-Written submissions and relevant documents [27-07-2023(online)].pdf 2023-07-27
4 Drawing [14-10-2016(online)].pdf 2016-10-14
4 201621035079-FORM-26 [17-07-2023(online)].pdf 2023-07-17
5 Description(Provisional) [14-10-2016(online)].pdf 2016-10-14
5 201621035079-Correspondence to notify the Controller [14-07-2023(online)].pdf 2023-07-14
6 Form 26 [09-02-2017(online)].pdf 2017-02-09
6 201621035079-US(14)-HearingNotice-(HearingDate-18-07-2023).pdf 2023-05-03
7 201621035079-PETITION UNDER RULE 138 [23-09-2020(online)].pdf 2020-09-23
7 201621035079-DRAWING [13-10-2017(online)].pdf 2017-10-13
8 201621035079-RELEVANT DOCUMENTS [23-09-2020(online)].pdf 2020-09-23
8 201621035079-COMPLETE SPECIFICATION [13-10-2017(online)].pdf 2017-10-13
9 201621035079-ABSTRACT [02-06-2020(online)].pdf 2020-06-02
9 201621035079-FORM 18 [20-10-2017(online)].pdf 2017-10-20
10 201621035079-CLAIMS [02-06-2020(online)].pdf 2020-06-02
10 201621035079-ORIGINAL UNDER RULE 6(1A) OTHERS-150217.pdf 2018-08-11
11 201621035079-COMPLETE SPECIFICATION [02-06-2020(online)].pdf 2020-06-02
11 Abstract1.jpg 2019-05-09
12 201621035079-ENDORSEMENT BY INVENTORS [02-06-2020(online)].pdf 2020-06-02
12 201621035079-FER.pdf 2019-12-02
13 201621035079-FER_SER_REPLY [02-06-2020(online)].pdf 2020-06-02
13 201621035079-RELEVANT DOCUMENTS [02-06-2020(online)].pdf 2020-06-02
14 201621035079-OTHERS [02-06-2020(online)].pdf 2020-06-02
14 201621035079-PETITION UNDER RULE 137 [02-06-2020(online)].pdf 2020-06-02
15 201621035079-OTHERS [02-06-2020(online)].pdf 2020-06-02
15 201621035079-PETITION UNDER RULE 137 [02-06-2020(online)].pdf 2020-06-02
16 201621035079-FER_SER_REPLY [02-06-2020(online)].pdf 2020-06-02
16 201621035079-RELEVANT DOCUMENTS [02-06-2020(online)].pdf 2020-06-02
17 201621035079-FER.pdf 2019-12-02
17 201621035079-ENDORSEMENT BY INVENTORS [02-06-2020(online)].pdf 2020-06-02
18 201621035079-COMPLETE SPECIFICATION [02-06-2020(online)].pdf 2020-06-02
18 Abstract1.jpg 2019-05-09
19 201621035079-CLAIMS [02-06-2020(online)].pdf 2020-06-02
19 201621035079-ORIGINAL UNDER RULE 6(1A) OTHERS-150217.pdf 2018-08-11
20 201621035079-ABSTRACT [02-06-2020(online)].pdf 2020-06-02
20 201621035079-FORM 18 [20-10-2017(online)].pdf 2017-10-20
21 201621035079-COMPLETE SPECIFICATION [13-10-2017(online)].pdf 2017-10-13
21 201621035079-RELEVANT DOCUMENTS [23-09-2020(online)].pdf 2020-09-23
22 201621035079-DRAWING [13-10-2017(online)].pdf 2017-10-13
22 201621035079-PETITION UNDER RULE 138 [23-09-2020(online)].pdf 2020-09-23
23 201621035079-US(14)-HearingNotice-(HearingDate-18-07-2023).pdf 2023-05-03
23 Form 26 [09-02-2017(online)].pdf 2017-02-09
24 201621035079-Correspondence to notify the Controller [14-07-2023(online)].pdf 2023-07-14
24 Description(Provisional) [14-10-2016(online)].pdf 2016-10-14
25 Drawing [14-10-2016(online)].pdf 2016-10-14
25 201621035079-FORM-26 [17-07-2023(online)].pdf 2023-07-17
26 Form 3 [14-10-2016(online)].pdf 2016-10-14
26 201621035079-Written submissions and relevant documents [27-07-2023(online)].pdf 2023-07-27
27 Form 5 [14-10-2016(online)].pdf 2016-10-14
27 201621035079-PatentCertificate31-10-2023.pdf 2023-10-31
28 Power of Attorney [14-10-2016(online)].pdf 2016-10-14
28 201621035079-IntimationOfGrant31-10-2023.pdf 2023-10-31

Search Strategy

1 2019-11-1917-34-49_21-11-2019.pdf

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