FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10; rule 13]
TITLE: “A WIPER MECHANISM, A SYSTEM FOR CONTROLLING THE WIPER MECHANISM AND A METHOD THEREOF”
Name and Address of the Applicant: TATA MOTORS LIMITED Nationality: Indian
The following specification particularly describes the nature of the invention and the manner in which it is to be performed.

TECHNICAL FIELD
Present disclosure generally relates to an automotive windshield wiper. Particularly, but not exclusively, the present disclosure relates to a wiper mechanism and a system for controlling the actuation of the wiper mechanism for demisting and wiping a windshield.
BACKGROUND OF THE DISCLOSURE
Windshield wipers are an important safety feature in automobiles which aids in clearing build¬up of snow, ice, dirt, mud, water etc., on a windshield of a vehicle. The wiper mechanism is configured to sweep across a surface of the windshield to keep the windshield clean while providing clear vision to occupants of the vehicle. Windshield wipers typically include a longitudinal frame and one or more flexible squeegees running along the length of the longitudinal frame. The longitudinal frame is usually held by a motorized arm that sweeps the wiper across the windshield with the squeegee in contact with the windshield surface to sweep away rain, snow, and other debris so that the rider has a clear view in front of their vehicle. Typically, a wiper motor output shaft is connected to a wiper arm (10) which is further connected to a plurality of links (11) as shown in Figs. 1a & 1b (prior art). The plurality of links (11) is further connected to a transmission linkage (5) through a crank mechanism (13) such that rotation of the wiper arm (10) is converted into the reciprocating motion of the transmission linkage. The transmission linkage (5) includes a long bar defined with a drive shaft (not shown) at either ends on which the windshield wipers (6) are mounted. Upon actuation of the motor (12), the reciprocating motion of the transmission linkage (5) actuates the drive shaft for angular movement of the windshield wipers across the surface of the windshield to clear the windshield for clearer vision to the occupants and a driver.
During normal condition, the windshield wipers may be operated by the driver generally by using a switch provided below the steering wheel which actuates the motorized arm to clear the windshield. However, in winter or rainy seasons, the windshield surface tends to get fogged, due to temperature difference in the cabin and the atmosphere which blurs vision of the occupants. This occurrence of fog is due to a condensation process which takes place near the windshield due to a difference in temperature and humidity on the inside of the vehicle compared to the outside environment.
Conventionally, to overcome this problem, the drivers or occupants may turn on the air conditioning (AC) of the vehicle to match the temperatures inside and outside temperatures,

thereby preventing condensation on the windshield and windows.. Another common practice is to pull down the windows to let the outside air enter the vehicle which will may also allow the rain droplets inside a cabin of the vehicle which is undesirable. Further, advanced vehicles may be provided with demister vents which may allow the outside air into the vehicle upon actuation by the rider. This however, may take some time to clear the fog on the windshield. Yet another common way that is used is to clean the windshield manually by a dry cloth by a driver or the occupant. However, this may prove unsafe to the driver while driving as it can divert the concentration of the driver and makes it difficult to control the vehicle and may cause accidents.
The present disclosure is directed to overcome one or more limitations stated above or other such limitations associated with the prior art.
SUMMARY OF THE DISCLOSURE
One or more shortcomings of conventional systems are overcome, and additional advantages are provided through a system and a method as claimed in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered as a part of the claimed disclosure.
In one non-limiting embodiment of the disclosure, a wiper mechanism for a windshield of a vehicle. The mechanism comprises a drive shaft connectable to at least one outer wiper at one end and at least one inner wiper at an another end of the drive shaft. A motor coupled to a wiper arm and the wiper arm is removably connected to a portion of the drive shaft, wherein the motor is configured to actuate the drive shaft. At least one energized coil is mounted on the one end and the another end of the drive shaft and connectable to the at least one outer wiper and the at least one inner wiper. The at least one energized coil is configured to selectively engage to the at least one outer wiper and the at least one inner wiper in a deenergized condition. The at least one energized coil is also configured to disengage from the at least one outer wiper and the at least one inner wiper in an energized condition.
In an embodiment of the disclosure, the wiper mechanism comprises at least one switch coupled to the at least one energized coil, the at least one switch is operable by a user to selectively actuate the at least one outer wiper and the at least one inner wiper across a surface of the windshield.

In an embodiment of the disclosure, wherein the drive shaft is configured to extend along an axis A-A perpendicular to the windshield (to position the at least one inner wiper opposite to the at least one outer wiper on opposing surfaces of the windshield.
In an embodiment of the disclosure, the at least one energized coil comprises a first energized coil associated with the at least one outer wiper and a second energized coil associated with the at least one inner wiper.
In an embodiment of the disclosure, the at least one energized coil is a solenoid coil operable on both alternating current (AC) and Direct current (DC).
In an embodiment of the disclosure, the at least one outer wiper and the at least one inner wiper are defined with at least one recess to receive at least one locking member of the at least one energized coil.
In an embodiment of the disclosure, wherein the at least one switch is at least one of a knob, a push button and a lever positioned on a console of the vehicle.
In an embodiment of the disclosure, the at least one energized coil comprises a base plate removably mounted to the drive shaft. A magnetic coil is connected to the base plate. A disc is coupled to the base plate by a resilient member and is slidably mounted to the drive shaft, wherein the disc is defined with the at least one locking member to couple with the at least one recess to actuate the at least one outer wiper and the at least one inner wiper. Wherein the magnetic coil is energized to displace the disc to disengage the at least one locking member from the at least one recess and disengaging the actuation of the at least one outer wiper and the at least one inner wiper.
In an embodiment of the disclosure, wherein the resilient member is configured to support the displacement of the disc to engage and disengage the at least one solenoid coil from the at least one outer wiper and the at least one inner wiper.
In another non-limiting embodiment of the disclosure, a system for operating a wiper mechanism of a windshield of a vehicle is disclosed. The system comprises a drive shaft and at least one outer wiper mounted on one end of the drive shaft. At least one inner wiper is mounted on another end of the drive shaft, the at least one inner wiper is positioned opposite to the at least one outer wiper. A wiper arm is removably coupled to a portion of the drive shaft at one end and a motor coupled to the wiper arm such that the motor and is configured to actuate

the drive shaft. Further, at least one energized coil is mounted on the one end and the other end of the drive shaft and connectable to the at least one outer wiper and the at least one inner wiper. The at least one solenoid coil is configured to selectively disengage from the at least one outer wiper and the at least one inner wiper in an energized condition and selectively engage to the at least one outer wiper and the at least one inner wiper in a deenergized condition. At least one switch is coupled to the at least one solenoid coil, and is operable by a user to transmit signals corresponding to actuation of the at least one outer wiper and the at least one inner wiper across a surface of the windshield. Additionally, a control unit is communicatively connected with the motor and the at least one switch, wherein the control unit is configured to receive the plurality of signals from the at least one switch corresponding to the actuation of the at least one outer wiper and the at least one inner wiper. The control unit is further configured to operate the at least one energized coil to one of engage and disengage from the at least one outer wiper and the at least one inner wiper based on the plurality of signals for selective actuation of the at least one outer wiper and the at least one inner wiper.
In another non-limiting embodiment of the disclosure, a method for controlling actuation of a wiper system of a windshield of a vehicle. The method comprising receiving, by a control unit, a first signal from at least one switch communicatively coupled to a first energized coil and a second energized coil. The first energized coil is associated with an at least one outer wiper and the second energized coil is associated with an at least one inner wiper. Actuating, by the control unit, the first energized coil in a deenergized condition and the second energized coil to an energized condition to operate the at least one outer wiper upon receiving the first signal. Receiving, by the control unit, a second signal from the at least one switch corresponding to the actuation of the second energized coil. Actuating by the control unit, the second energized coil in a deenergized condition and the first energized coil to an energized condition to operate the at least one inner wiper upon receiving the second signal. Receiving by the control unit, a third signal from the at least one switch corresponding to the actuation of the first energized coil and the second energized coil. Lastly, actuating by the control unit, both the first and second energized coils in a deenergized condition to operate the at least one outer wiper and the at least one inner wiper based on the third signal.
It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined together to form a further embodiment of the disclosure.

The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS
The novel features and characteristic of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an embodiment when read in conjunction with the accompanying drawings. One or more embodiments are now described, by way of example only, with reference to the accompanying drawings wherein like reference numerals represent like elements and in which:
Fig. 2 illustrates a perspective view of a wiper mechanism in accordance with an embodiment of the present disclosure.
Fig. 3 illustrates an exploded view of the wiper mechanism of Fig. 1.
Fig. 4a illustrates a side sectional view of the wiper mechanism depicting an outer wiper in an active mode in accordance with an embodiment of the present disclosure.
Fig. 4b illustrates a sectional view of at least one energized coil connectable to the wiper mechanism in accordance with an embodiment of the present disclosure.
Fig. 5 illustrates a side sectional view of the wiper mechanism depicting an inner wiper in an active mode in accordance with an embodiment of the present disclosure
Fig. 6 illustrates a side sectional view of the wiper mechanism depicting both an outer and the inner wiper in the active mode, in accordance with an embodiment of the present disclosure.
Fig. 7 illustrates at least one switch for selectively actuating the wiper mechanism of Fig. 1.
Fig. 8 illustrate a schematic layout of a system for operating the wiper mechanism of a windshield of a vehicle, in accordance with an embodiment of the present disclosure.
Fig. 9 illustrates a flow diagram of a method for controlling actuation of a wiper system of a windshield of a vehicle, in accordance with an embodiment of the present disclosure.

The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
While the embodiments in the disclosure are subject to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the figure and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.
It is to be noted that a person skilled in the art would be motivated from the present disclosure and modify various features of the method and the system, without departing from the scope of the disclosure. Therefore, such modifications are considered to be part of the disclosure. Accordingly, the drawings show only those specific details that are pertinent to understand the embodiments of the present disclosure, so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skilled in the art having benefit of the description herein. Also, the method of the present disclosure may be employed in a variety of vehicles having different specification.
The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that of a system that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, method, or assembly, or device. In other words, one or more elements in a system or device proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or device.
Embodiments of the present disclosure discloses a wiper mechanism for a windshield of a vehicle and a system thereof. Conventionally, a wiper motor output shaft is connected to a wiper arm which is further connected to a plurality of links. A plurality of links is further connected to a transmission linkage through a crank mechanism such that rotation of the wiper arm is converted into the reciprocating motion of the transmission linkage. The transmission linkage includes a longitudinal bar defined with a drive shaft at either ends on which the

windshield wipers are mounted. Upon actuation of the motor, the reciprocating motion of the transmission linkage actuates the drive shaft for angular movement of the windshield wipers across a surface of the windshield to clear the windshield for clearer vision to the rider. However, during rainy or winter seasons, fog is deposited on the surface of the windshield, thereby obstructing the view of the rider while driving the vehicle. This fog is formed due to a condensation process which may occur on the windshield due to a difference in temperature and humidity on the cabin of the vehicle compared to the outside environment. Existing methods of removal include turning ON the vehicle air conditioning (AC) system and dropping down the windows of the vehicle to equalize the temperature and humidity within and outside of the vehicle. However, conventional methods for demisting the windshield may cause discomfort to the passengers and may prove to be unsafe for the rider.
In view of the above, embodiments of the present disclosure disclose a wiper mechanism for selectively actuating at least one outer wiper and at least one inner wiper across a windshield surface of a vehicle for demisting the windshield. The wiper mechanism may be employed in passenger vehicle and/or commercial vehicles. The wiper mechanism comprises a drive shaft which is connected to the at least one outer wiper at one end and the at least one inner wiper at an another end of the drive shaft. A motor is coupled to a wiper arm which is removably connected to a portion of the drive shaft. The motor is configured to actuate the drive shaft. At least one energized coil is mounted on the one end and the another end of the drive shaft and is connected to the at least one outer wiper and the at least one inner wiper. The at least one energized coil is configured to operate to an energized condition and a deenergized condition. The at least one energized coil is configured to selectively engage to the at least one outer wiper and the at least one inner wiper in a deenergized condition. Whereas in the energized condition, the at least one energized coil is configured to disengage from the at least one outer wiper and the at least one inner wiper.
Further, the present disclosure also discloses a system and a method for selectively controlling the actuation of a wiper mechanism. The system comprises a drive shaft and at least one outer wiper mounted on one end of the drive shaft. At least one inner wiper is mounted on another end of the drive shaft, where the at least one inner wiper is positioned opposite to the at least one outer wiper. A wiper arm is removably coupled to a portion of the drive shaft at one end and a motor is coupled to the wiper arm such that the motor is configured to actuate the drive shaft. Further, at least one energized coil is mounted on the one end and the other end of the

drive shaft and connectable to the at least one outer wiper and the at least one inner wiper. The at least one energized coil is configured to selectively disengage from the at least one outer wiper and the at least one inner wiper in an energized condition and selectively engage to the at least one outer wiper and the at least one inner wiper in a deenergized condition. At least one switch is coupled to the at least one solenoid coil to transmit signals corresponding to actuation of the at least one outer wiper and the at least one inner wiper across a surface of the windshield. Additionally, a control unit is communicatively connected with the motor and the at least one switch. The control unit is configured to receive the plurality of signals from the at least one switch corresponding to the actuation of the at least one outer wiper and the at least one inner wiper. The control unit is further configured to operate the at least one energized coil to one of engage and disengage from the at least one outer wiper and the at least one inner wiper based on the plurality of signals for selective actuation of the at least one outer wiper and the at least one inner wiper.
The present disclosure also discloses a method for controlling the actuation of the wiper mechanism. The method comprising the steps of initially receiving, by a control unit, a first signal from at least one switch communicatively coupled to a first energized coil associated with the at least one outer wiper and a second energized coil associated with the at least one inner wiper. The method further includes actuating, by the control unit, the first energized coil to a deenergized condition and the second energized coil to an energized condition to operate the at least one outer wiper upon receiving the first signal. Further receiving, by the control unit, a second signal from the at least one switch corresponding to the actuation of the second energized coil. Followed by actuating the second energized coil to a deenergized condition and the first energized coil to an energized condition to operate the at least one inner wiper upon receiving the second signal. Further, the control unit receives a third signal from the at least one switch corresponding to the actuation of the first energized coil and the second energized coil. Lastly, actuating by the control unit, both the first and second energized coils in a deenergized condition to operate the at least one outer wiper and the at least one inner wiper based on the third signal.
The following paragraphs describe the present disclosure with reference to Figures. 2 to 9. In the figures, the same element or elements which have similar functions are indicated by the same reference signs.

Figs. 2 and 3 illustrates a perspective and exploded views of a wiper mechanism respectively [hereinafter referred to as mechanism (100)] for a windshield (2) of a vehicle. The mechanism (100) comprises a drive shaft (4) connectable to at least one outer wiper (6) at one end and at least one inner wiper (8) at an another end of the drive shaft (4). The drive shaft (4) extends perpendicular to the windshield (2) along an axis (A-A) such that the at least one outer wiper (6) and the at least one inner wiper (8) are positioned on either surfaces [adjacently placed or positioned] of the windshield (2) opposite to each other. In an embodiment, the at least one inner wiper (8) is located within the cabin of the vehicle and is in contact with an inner surface of the windshield (2). The drive shaft (4) is connected to a transmission linkage (5) which is positioned in parallel to a longitudinal surface of the windshield (2) (as shown in Fig. 1a). In an embodiment, a wiper arm (10) may be removably connected to a portion of the drive shaft (4) through a crank-bar mechanism (13) in which the wiper arm (10) is configured to be a crank. The wiper arm (10) may be connected the drive shaft (4) at one end through at least one connecting link (7) and an another end of the wiper arm (10) is connected to a motor (12). In an embodiment, the wiper arm (10) may be connected to an output shaft of the motor (12) such that the rotation of the output shaft of the motor (12) is transferred to the wiper arm (10). The rotational motion of the wiper arm (10) is converted into a reciprocating movement of the transmission linkage (10) which further actuates the drive shaft (4). The at least one outer wiper (6) and the at least one inner wiper (8) are mounted to the drive shaft (4) by a bearing (32). In an embodiment, the bearing (32) may be defined with an inner ring and an outer ring (not shown in figs.) forming a keyway there-between to accommodate rollers (not shown) to move freely within the groove. The inner ring of the bearing (32) is in contact with the drive shaft (4) and at least one outer wiper (6) along with the at least one inner wiper (8) are in contact with the outer ring. The bearing (32) reduces friction between the drive shaft (4) and the at least one outer and inner wipers (6,8) such that the drive shaft (4) freely rotates without actuating the at least one outer wiper (6) and the at least one inner wiper (8). The at least one outer wiper (6) and the at least one inner wiper (8) are defined with at least one recess (18) to receive at least one locking member (20). Further, at least one energized coil (14) is mounted on either ends of the drive shaft (as shown in Fig. 4b). The at least one energized coil (14) comprises a base plate (22) and a magnetic coil (24) centrally disposed on the base plate (22). In an embodiment, the base plate (22) is defined with at least one hole (not shown in figs.) to receive a fastener (23). The magnetic coil (24) may be connected to the base plate (22) by passing the fastener
(23) through the at least one hole. In an embodiment, the base plate (22) and the magnetic coil
(24) may be fixedly mounted on the drive shaft (4). Further, a movable disc (26) is coupled to

the base plate (22) through a resilient member (27). The movable disc (26) is defined with a slot (not shown in figs.) at its central portion to receive a key (34). The key (34) is mounted on the drive shaft (4) and is configured to arrest the movement of the movable disc (26) beyond a length of the key (34). The movable disc (26) is defined with the at least one locking member (20) configured to engage with the at least one recess (18) of the at least one outer wiper (6) and the at least one inner wiper (26). In an embodiment, the at least one locking member (20) may be a projection (36) extending from the movable disc (26) and the dimensions of the projection (36) is in line with the dimensions of the at least one recess (18). In an embodiment, the movable disc (26) is manufactured of a magnetic material and the key (34) is manufactured of a non-magnetic material. In an embodiment, the base plate (22), the magnetic coil (24) and the movable disc (26) are annular members that are concentrically mounted on the drive shaft (4). However, this cannot be construed as a limitation and the components of the at least one energized coil (14) may be structured based on requirement. The at least one energized coil (14) is configured to operate in one of an energized condition and in a de-energized condition. In an embodiment, the magnetic coil (24) of the at least one energized coil (14) creates a magnetic field around it when the magnetic coil (24) is supplied with electric power to pass electric current through the magnetic coil (24) in an energized condition. In an energized condition, the movable disc (26) is displaced on the drive shaft (4) towards the magnetic coil (24) to contact with the magnetic coil (24) due to magnetic force. The at least one resilient member (27) is in compressed state in an energized condition. Alternatively, when the electric power is removed, the magnetic coil (24) is de-energized and , the movable disc (26) is displaced away from the magnetic coil (24) on the drive shaft (4) by the release of compressive force on the at least one resilient member (27). Upon actuation of the at least one energized coil (14), the at least one locking members (20) are disengaged from the at least one recess (18) of the at least one outer and inner wipers (6, 8) thereby rendering them to be idle. Whereas the at least one locking member (20) engages within the recess (18) in a deenergized condition such that the at least one energized coil (14) actuates the at least one outer wiper (6) and the at least one inner wiper (8) along with the drive shaft (4). In an embodiment, the at least one energized coil (14) may be a solenoid coil which may be operated through an alternating current (AC) or a direct current (DC) supply.
The wiper mechanism further comprises at least one switch (16) that is coupled to the at least one energized coil (14) (as shown in Fig. 7). In an embodiment, the at least one switch (16) may be operated to actuate the at least one energized coil (14) between an energized condition

and the deenergized condition to selectively actuate the at least one outer wiper (6) and the at least one inner wiper (8). In an embodiment, the at least one switch (16) may be configured to transmit a plurality of signals to a control unit (30) corresponding to the actuation of the at least one energized coil (14). The at least one switch (16) with at least one of a knob (19), a push button and a lever positioned on a dashboard console of the vehicle.
Referring to Fig. 8, a system (200) for operating a wiper mechanism (100) for a windshield of a vehicle is disclosed. The system (200) comprises a drive shaft (4) which extends along an axis (A—A). At least one outer wiper (6) is mounted on one end of the drive shaft (4) and the at least one inner wiper (8) is mounted on an another end of the dive shaft (4). The at least one outer wiper (6) and the at least one inner wiper (8) are positioned opposite to each other on an outer surface and the inner surface of the windshield (2) respectively. A wiper arm (10) is coupled to a portion of the drive shaft (4) at one end. In an embodiment, the wiper arm (10) is coupled at a central portion of the drive shaft (4). However such construction cannot be construed as limiting as the wiper arm (10) may be coupled at any portion along a length of the drive shaft (4). A motor (12) is coupled to the wiper arm (10) and is configured to drive the wiper arm (10) to actuate the drive shaft (4). In an embodiment, the motor (12) may be a stepper motor, a brushless DC motor or a servo motor with a capacity of 12V DC for actuating the drive shaft (4). Further, at least one energized coil (14) is mounted on the one end and the other end of the drive shaft (4). The at least one energized coil (14) is coupled to the at least one outer wiper (6) and the at least one inner wiper (8). The at least one energized coil (14) is configured to selectively disengage from the at least one outer wiper (6) and the at least one inner wiper (8) in an energized condition. In an embodiment, the at least one energized coil (14) may comprise a first energized coil (15) associated with the at least one outer wiper (6) and a second energized coil (16) associated with the at least one inner wiper (8). In an embodiment, The at least one energized coil (14) is configured to selectively engage to the at least one outer wiper (6) and the at least one inner wiper (8) in a deenergized condition. At least one switch (17) is coupled to the at least one energized coil (14) and is operable by a user. The at least one switch (17) is configured to transmit a plurality of signals corresponding to actuation of the at least one outer wiper (6) and the at least one inner wiper (8) across a surface of the windshield (2). The system (200) further comprises a control unit (30) which is communicatively coupled to the motor (12) and the at least one switch (16). The control unit (30) is configured to receive the plurality of signals from the at least one switch (16) corresponding to the actuation of the at least one outer wiper (6) and the at least one inner wiper

(8). In an embodiment, the plurality of signals may correspond to but not limited to actuation of the at least one outer wiper (6) individually, actuation of the at least one inner wiper (8) individually and actuation of both the at least one outer wiper (6) and the at least one inner wiper (8) together. Upon receipt of the plurality signals, the control unit (30) actuates the at least one energized coil (14) to one of engage and disengage from the at least one outer wiper (6) and the at least one inner wiper (8) for selective actuation of the at least one outer wiper (6) and the at least one inner wiper (8).
Referring to Fig. 9 a method (300) for controlling actuation of a wiper mechanism (100) of a windshield (2) in a vehicle is disclosed. The method includes the steps of initially receiving a first signal from at least one switch (17) by a control unit (30) at step 101. At step 102, the control unit (30) actuates the first energized coil (15) to a deenergized condition and also operates the second energized coil (16) to an energized condition simultaneously to operate the at least one outer wiper (6) based on the first signal. Further, at step 103 the control unit (30) receives a second signal from the at least one switch (17) corresponding to the actuation of the second energized coil (16). Upon receiving the second signal the control unit (3) actuates the second energized coil (16) to a deenergized condition and the first energized coil (15) to an energized condition to operate the at least one inner wiper (8) at step 104. Later, the control unit (30) receives a third signal from the at least one switch (16) corresponding to the actuation of the first energized coil (15) and the second energized coil (16) at step 105. Lastly at step 106, the control unit (30) actuates the first and second energized coil (15) and the second energized coil (16) together to a deenergized condition to operate the at least one outer wiper (6) and the at least one inner wiper (8) based on the third signal.
The working operation of the wiper mechanism (100) and the operation modes is now explained. The wiper mechanism (100) is integrated with the control unit (30) to selectively actuate the at least one outer wiper (6) and the at least one inner wiper (8). The at least one outer wiper (6) and the at least one inner wiper (8) are mounted on the drive shaft (4) which extends along the axis (A-A) perpendicular to the surface of the windshield (2). The at least one switch (17) is provided on a dashboard console of the vehicle and is operable by the user to select a desired operation mode such as activating the at least one outer wiper (6), activating the at least one inner wiper (8), and activating both the at least one outer and inner wipers (6, 8) together. The operation modes are described as below:

Outer wiper active mode: Referring to fig. 4a, when the user wants to actuate the at least one outer wiper (6), the at least one switch (17) is operated by the user to a desired position (say first position) in a clock-wise or anti-clockwise direction. Upon actuation of the at least one switch (17), the control unit (30) receives the corresponding signal from the at least one switch (17) and activates the motor to rotate the drive shaft (4). As the drive shaft (4) is connected to the at least one outer wiper (6) through a bearing (32), the drive shaft (4) rotates freely without actuating the at least one outer wiper (6) at this stage. After actuating the motor (12), the control unit (30) actuates the first energized coil (15) of the at least one energized coil (14) to a deenergized condition such that, the movable disc (26) is displaced away from the base plate (22) due to deactivation of the magnetic coil (cutting off electric power to the magnetic coil). This effects the at least one locking member (20) to engage within the at least one recess (18) provided on the at least one outer wiper (6). The control unit (30) also actuates the second energized coil (16) to an energized condition such that the at least one locking member (20) does not engage with the at least one recess (18) on the at least one inner wiper (8). As the first energized coil (15) is fixedly coupled with the drive shaft (4) and is in contact with the at least one outer wiper (6), the at least one outer wiper (6) is thereby actuated and remains in active state. The at least one tone inner wiper (8) remains stationary and the second energized coil (16) is not in contact with the at least one inner wiper (8).
Inner wiper active mode: Referring to Fig, Fig. 5, when the user wants to actuate the at least one inner wiper (8), the at least one switch (17) is operated by the user to a desired position (say second position) in a clock-wise or anti-clockwise direction. Upon actuation of the at least one switch (17), the control unit (30) receives the corresponding signal from the at least one switch (17) and activates the motor to rotate the drive shaft (4). As the drive shaft (4) is connected to the at least one outer wiper (6) through a bearing (32), the drive shaft (4) rotates freely without actuating the at least one outer wiper (6) at this stage. After actuating the motor (12), the control unit (30) actuates the first energized coil (15) of the at least one energized coil (14) to an energized condition such that, the movable disc (26) is attracted to the base plate (22) and the at least one locking member (20) is disengaged from the at least one recess (18) provided on the at least one outer wiper (6). The control unit (30) also actuates the second energized coil (16) to a deenergized condition such that the at least one locking member (30) engages with the at least one recess (18) on the at least one inner wiper (8). As the second energized coil (16) is fixedly coupled with the drive shaft (4) and is in contact with the at least one inner wiper (8), the at least one inner wiper (8) is thereby actuated and remains in active

state. The at least one inner wiper (8) is generally actuated for demisting the inner surface of the windshield (2). The at least one outer wiper (6) remains stationary as the first energized coil (15) is not in contact with the at least one outer wiper (8).
Outer and Inner wipe active mode: Referring to fig. 6, upon actuation of the a least one switch (17) to a third position, the control unit (30) receives the corresponding signal from the at least one switch (17) and activates the motor (12) to rotate the drive shaft (4). Further, the control unit (30) actuates the first and second energized coils (15, 16) to a deenergized condition such that the locking members (20) of the first and second energized coils (15, 16) engage with the corresponding recesses (18) of the at least one outer wiper (6) and the at least one inner wiper (8) respectively. This effects the actuation of both the at least one outer and inner wipers (6, 8) across the outer and inner surfaces of the windshield (2). This mode may be used by the user for clearing rain. dust and foreign particles from the outer surface of the windshield (2) and for demisting the inner surface of the windshield (2) simultaneously.
In an embodiment of the disclosure, the control unit (30) may be a centralized control unit, or a dedicated control unit associated with the vehicle. The control unit (30) may be implemented by any computing systems that is utilized to implement the features of the present disclosure. The control unit (30) may be comprised of a processing unit. The processing unit may comprise at least one data processor for executing program components for executing user- or system-generated requests. The processing unit may be a specialized processing unit such as integrated system (bus) controllers, memory management control units, floating point units, graphics processing units, digital signal processing units, etc. The processing unit may include a microprocessor, such as AMD Athlon, Duron or Opteron, ARM’s application, embedded or secure processors, IBM PowerPC, Intel’s Core, Itanium, Xeon, Celeron or other line of processors, etc. The processing unit may be implemented using a mainframe, distributed processor, multi-core, parallel, grid, or other architectures. Some embodiments may utilize embedded technologies like application-specific integrated circuits (ASICs), digital signal processors (DSPs), Field Programmable Gate Arrays (FPGAs), etc.
In some embodiments, the ECU may be disposed in communication with one or more memory devices (e.g., RAM, ROM etc.) via a storage interface. The storage interface may connect to memory devices including, without limitation, memory drives, removable disc drives, etc., employing connection protocols such as serial advanced technology attachment (SATA), integrated drive electronics (IDE), IEEE-1394, universal serial bus (USB), fiber channel, small

computing system interface (SCSI), etc. The memory drives may further include a drum, magnetic disc drive, magneto-optical drive, optical drive, redundant array of independent discs (RAID), solid-state memory devices, solid-state drives, etc.
It is to be understood that a person of ordinary skill in the art may develop a system of similar configuration without deviating from the scope of the present disclosure. Such modifications and variations may be made without departing from the scope of the present invention. Therefore, it is intended that the present disclosure covers such modifications and variations provided they come within the ambit of the appended claims and their equivalents.
Equivalents:
With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare

recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system (108) having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances, where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system (108) having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.” While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
Referral Numerals:

Wiper Mechanism 100
System 200
Method 300
Windshield 21
Drive shaft 4
Transmission linkage 5
At least one outer wiper 6
Connecting link 7
At least one inner wiper 8
Wiper arm 10

Motor 12
At least one energized coil 14
First energized coil 15
Second energized coil 16
At least one switch 17
At least one recess 18
At least one locking member 20
Base plate 22
Magnetic coil 24
Movable disc 26
Resilient member 27
Control unit 30
Bearing 32
Key member 34
Projection 36

We claim:
1. A wiper mechanism (100) for a windshield (2) of a vehicle, the mechanism (100)
comprising:
a drive shaft (4) connectable to at least one outer wiper (6) at one end and at least one inner wiper (8) at an another end of the drive shaft (4);
a motor (12) coupled to a wiper arm (10) and the wiper arm removably connected to a portion of the drive shaft (4), wherein the motor (12) is configured to actuate the drive shaft (4);
at least one energized coil (14) mounted on the one end and the another end of the drive shaft (4) and connectable to the at least one outer wiper (6) and the at least one inner wiper (8), wherein the at least one energized coil (14) is configured to:
selectively engage to the at least one outer wiper (6) and the at least one
inner wiper (8) in a deenergized condition; and
disengage from the at least one outer wiper (6) and the at least one inner
wiper (8) in an energized condition.
2. The wiper mechanism (100) as claimed in claim 1, comprises at least one switch (17) coupled to the at least one energized coil (14), the at least one switch (17) is operable by a user to selectively actuate the at least one outer wiper (6) and the at least one inner wiper (8) across a surface of the windshield (2).
3. The wiper mechanism (100) as claimed in claim 1, wherein the drive shaft (4) is configured to extend along an axis (A-A) perpendicular to the windshield (2) to position the at least one inner wiper (8) opposite to the at least one outer wiper (6) on opposing surfaces of the windshield (2).
4. The wiper mechanism (100) as claimed in claim 1, wherein the at least one energized coil (14) comprises a first energized coil (15) associated with the at least one outer wiper (6) and a second energized coil (16) associated with the at least one inner wiper (8).
5. The wiper mechanism (100) as claimed in claim 1, wherein the at least one energized coil (14) is a solenoid coil operable on both alternating current (AC) and Direct current (DC).

6. The wiper mechanism (100) as claimed in claim 1, wherein the at least one outer wiper (6) and the at least one inner wiper (8) are defined with at least one recess (18) to receive at least one locking member (20) of the at least one energized coil.
7. The wiper mechanism (100) as claimed in claim 1, wherein the at least one switch (17) is at least one of a knob, a push button and a lever positioned on a dashboard console of the vehicle.
8. The wiper mechanism (100) as claimed in claim 1, wherein the at least one energized coil (14) comprises:
a base plate (22) removably mounted to the drive shaft (4);
a magnetic coil (24) connected to the base plate (22);
a movable disc (26) coupled to the base plate by a resilient member (27) and is slidably mounted to the drive shaft (4), wherein the movable disc (26) is defined with the at least one locking member (20) to couple with the at least one recess (18) to actuate the at least one outer wiper (6) and the at least one inner wiper (8); and
wherein the magnetic coil (24) is energized to displace the movable disc (26) to disengage the at least one locking member (20) from the at least one recess (18) and disengaging the actuation of the at least one outer wiper and the at least one inner wiper.
9. The wiper mechanism (100) as claimed in claim 4, wherein the resilient member (27) is configured to support the displacement of the disc (26) to engage and disengage the at least one solenoid coil (14) from the at least one outer wiper (6) and the at least one inner wiper (8).
10. A system (200) for operating a wiper mechanism of a windshield (2) of a vehicle, the system (200) comprising:
a drive shaft (4);
at least one outer wiper (6) mounted on one end of the drive shaft (4);
at least one inner wiper (8) mounted on another end of the drive shaft (4), the at least one inner wiper (8) is positioned opposite to the at least one outer wiper (6);
a wiper arm (10) is removably coupled to a portion of the drive shaft (4) at one end;

a motor (12) coupled to the wiper arm (10) and is configured to actuate the drive shaft (4);
at least one energized coil (14) mounted on the one end and the other end of the drive shaft (4) and connectable to the at least one outer wiper (6) and the at least one inner wiper (8), wherein the at least one solenoid coil (14) is configured to:
selectively disengage from the at least one outer wiper (6) and the at least one inner wiper (8) in an energized condition;
selectively engage to the at least one outer wiper (6) and the at least one inner wiper (8) in a deenergized condition; and
at least one switch (17) coupled to the at least one energized coil (14), the at least one switch (17) is operable by a user to transmit a plurality of signals corresponding to actuation of the at least one outer wiper (6) and the at least one inner wiper (8) across a surface of the windshield (2).
a control unit (30) communicatively connected with the motor (12) and the at least one switch (16),
wherein the control unit (30) is configured to:
receive the plurality of signals from the at least one switch (17) corresponding to the actuation of the at least one outer wiper (6) and the at least one inner wiper (8);
operate the at least one energized coil (14) to one of engage and disengage from the at least one outer wiper and the at least one inner wiper based on the plurality of signals for selective actuation of the at least one outer wiper (6) and the at least one inner wiper (8).
11. A method (300) for controlling actuation of a wiper system of a windshield in a vehicle, the method (300) comprising;
receiving, by a control unit (30), a first signal from at least one switch (16) communicatively coupled to a first energized coil (15) and a second energized coil (16), the first energized coil (15) is associated with an at least one outer wiper (6) and the second energized coil (16) is associated with an at least one inner wiper (8);
actuating, by the control unit (30), the first energized coil (15) to a deenergized condition and the second energized coil to an energized condition to operate the at least one outer wiper (6) upon receiving the first signal;

receiving, by the control unit (30), a second signal from the at least one switch (16) corresponding to the actuation of the second energized coil (16);
actuating by the control unit (30), the second energized coil (16) in a deenergized condition and the first energized coil (15) to an energized condition to operate the at least one inner wiper (8) upon receiving the second signal;
receiving by the control unit (30), a third signal from the at least one switch (16) corresponding to the actuation of the first energized coil (15) and the second energized coil (16);
actuating by the control unit (30), both the first and second energized coils (15, 16) to a deenergized condition to operate the at least one outer wiper (6) and the at least one inner wiper (8) based on the third signal.