DESC:FIELD
The present disclosure generally relates to door opening and closing mechanisms, and more particularly to an arrangement for controlled opening of a swing tail gate.
BACKGROUND
The background information herein below relates to the present disclosure but is not necessarily prior art.
Usually, upward-openable back doors of a vehicle employ a check-arm or a slider mechanism for their opening movement. However, the same check-arm cannot be used for sideward swingable back doors due to packaging constraints that disallow leveraging of the check-arms, while the linear displacement of the slider mechanism is imitated by the curved configuration of the tailgate.
Apart from the above-described problems, the movement of the conventional sideward swingable back doors cannot be controlled while angularly displacing the back door from a closed position to a completely open position. As a result, once opened, the back door is angularly displaced in one fluid movement to its completely open position, which may result in hitting an obstacle such as a pole or a human walking over pedestrian on its way.
There is therefore felt a need for an arrangement for controlled opening of a swing tail gate that alleviates the aforementioned drawbacks.
OBJECTS
Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:
It is an object of the present disclosure to ameliorate one or more problems of the prior art or to at least provide a useful alternative.
An object of the present disclosure is to provide an arrangement for controlled opening of a swing tail gate of a vehicle.
Another object of the present disclosure is to provide an arrangement for controlled opening of a swing tail gate which allows sideward swung.
Yet another object of the present disclosure is to provide an arrangement for controlled opening of a swing tail gate which allows controlled movement of the gate between a closed position to a wide-open position.
Still another object of the present disclosure is to provide an arrangement for controlled opening of a swing tail gate which is compact and unobtrusive.
Yet another object of the present disclosure is to provide an arrangement for controlled opening of a swing tail gate which is easy to use.
Still another object of the present disclosure is to provide an arrangement for controlled opening of a swing tail gate which requires no adjustments and operates reliably.
Yet another object of the present disclosure is to provide an arrangement for controlled opening of a swing tail gate which automatically closes the door at a safe, controlled speed to avoid slamming the door shut.
Still another object of the present disclosure is to provide an arrangement for controlled opening of a swing tail gate which cushions the door as it approaches the door jamb to avoid injury to fingers or other body parts caught in the door.
Yet another object of the present disclosure is to provide an arrangement for controlled opening of a swing tail gate which is inexpensive to manufacture and easy to install.
Still another object of the present disclosure is to provide an arrangement for controlled opening of a swing tail gate which prevents accidental hitting to the pedestrian.
Yet another object of the present disclosure is to provide an arrangement for controlled opening of a swing tail gate which facilitates self-closing of the door.
Other objects and advantages of the present disclosure will be more apparent from the following description when read in conjunction with the accompanying figures, which are not intended to limit the scope of the present disclosure.
SUMMARY
The present disclosure envisages an arrangement for controlled opening of a swing tail gate of a vehicle. The arrangement comprises at least one first ball and socket joint which is configured to be mounted to a body frame of the vehicle; at least one second ball and socket joint which is configured to be mounted to an operative surface of the swing tail gate; and a gas strut configured to be fitted between the first ball and socket joint and the second ball and socket joint.
In an embodiment, the first ball and socket joint is configured to be mounted to the body frame by means of a L-shaped bracket, more particularly, the first ball and socket joint is configured to be mounted perpendicular to a flange surface of the L-shaped bracket. The second ball and socket joint is configured to be mounted parallelly to a plane of the swing tail gate.
In an embodiment, the first ball and socket joint and the second ball and socket joint are in a parallel plane.
Further, the gas strut is defined by a hollow cylinder chamber filled with pressurized gas; a diaphragm type piston which is configured to move axially within the chamber; a piston rod which is configured to extend from an operative surface of the piston; and a trough profile which is configured between operative ends of the cylinder chamber and is further configured to protrude from an inner surface of the cylinder chamber. The trough profile defines an intermediate rest position for the piston within the hollow cylinder chamber and thereby defining a location where the outward movement of the swing gate tail is temporarily restrained; the restrained motion is being configured to be overcome by applying a manual force on the swing gate to displace the piston beyond the peak of the trough profile.
In an embodiment, the trough profile is made from a material selected from a resilience material, spongy or rubber material or any combination thereof.
In an embodiment, the movement of the piston till the intermediate rest position enables the opening of the swing tail gate to a mid-position.
In an embodiment, the difference in gas pressure on either side of the piston facilitates self-opening of the swing tail gate firstly to the mid-position and then to complete opening of the swing tail gate.
In an embodiment, the piston is configured with at least one non-return valve (NR Valve) to facilitate the flow of pressurized gas therethrough. The non-return valve (NR Valve) is configured to open when the piston is allowed to be displaced from the intermediate rest position towards extreme position to facilitate gas to pass through the non-return valve (NR Valve).
Further, the present disclosure also envisages a method of mounting the arrangement for controlled opening of the swing tail gate. The method comprising the following steps:
• providing the at least one first ball and socket joint;
• mounting the at least one first ball and socket joint on an operative surface of a body frame of the vehicle;
• providing the at least one second ball and socket joint;
• mounting the at least one second ball and socket joint on an operative surface of the swing tail gate;
• providing the gas strut; and
• fitting the gas strut between the first ball and socket joint and the second ball and socket joint.
In an embodiment, the method further includes:
• allowing the piston to rest at an intermediate rest position defined by the trough profile;
• restraining the temporary outward movement of the swing gate tail at the intermediate rest position;
• applying a manual force to overcome the restrained movement on the swing tail gate to displace the piston beyond a peak of the trough profile; and
• allowing the swing tail gate to move from the intermediate rest position to a completely open position of the tail gate.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
An arrangement for controlled opening of a swing tail gate of a vehicle, of the present disclosure, will now be described with the help of the accompanying drawing, in which:
Figure 1 illustrates a schematic perspective view of the body frame with a swing tail gate attached to the body frame and a gas-strut attached therebetween;
Figure 2 illustrates a schematic view of a gas strut in accordance with an embodiment of the present disclosure;
Figure 3A and Figure 3B illustrate an exploded schematic view of a gas strut in accordance with an embodiment of the present disclosure;
Figure 4A illustrates a schematic view of the gas strut in contracted position when the swing tail gate is closed in accordance with an embodiment of the present disclosure;
Figure 4B illustrates a schematic view of the gas strut in extended position when the swing tail gate is open in accordance with an embodiment of the present disclosure;
Figure 5 illustrates a schematic view of the gas strut when the swing tail gate is at intermediate rest position in accordance with an embodiment of the present disclosure;
Figure 6A illustrates a schematic view of a L-shaped bracket mounted over the body frame of the vehicle;
Figure 6B illustrates mounting of a first ball and socket joint and a second ball and socket joint in accordance with an embodiment of the present disclosure;
Figure 6C illustrates mounting of the gas strut on the first ball and socket joint and the second ball and socket joint in accordance with an embodiment of the present disclosure; and
Figure 7 illustrates position of the swing tail gate with respect to the body frame of the vehicle in accordance with an embodiment of the present disclosure.
LIST OF REFERENCE NUMERALS USED IN DETAILED DESCRIPTION AND DRAWING
100 arrangement for controlled opening
100a gas strut in contracted position during closed position of swing tail gate
100b gas strut in extended position during open position of swing tail gate
100c gas strut at the proximity of trough profile during intermediate rest position of swing tail gate
20 swing tail gate
22 vehicle
22a body frame of the vehicle
24 first ball and socket joint
26 second ball and socket joint
28 gas strut
28a first extremities of the gas-strut
28b second extremities of the gas-strut
28c hollow cylinder chamber
28d diaphragm type piston
28e piston rod
28f trough profile
28g intermediate rest position
30 L-shaped bracket
32 non-return valve (NRV)
34 fastening means
DETAILED DESCRIPTION
Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.
Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details, are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.
The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms "a,” "an," and "the" may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms “including,” and “having,” are open ended transitional phrases and therefore specify the presence of stated features, integers, steps, operations, elements and/or components, but do not forbid the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed elements.
Typically, upward-openable back doors of a vehicle employ a check-arm or a slider mechanism for their opening movement. However, the same check-arm cannot be used for sideward swingable back doors due to packaging constraints that disallow leveraging of the check-arms, while the linear displacement of the slider mechanism is imitated by the curved configuration of the tailgate.
Apart from the above-described problems, the movement of the conventional sideward swingable back doors cannot be controlled while angularly displacing the back door from a closed position to a completely open position. As a result, once opened, the back door is angularly displaced in one fluid movement to its completely open position, which may result in hitting an obstacle such as a pole or a human walking over pedestrian on its way. Also, due to the curvy structure of the body frame near to the gate panel, the mounting and fastening means requires a large space for packaging a check arm.
In order to address the aforementioned problems, the present disclosure envisages an arrangement (herein after referred as arrangement 100) for controlled opening of a swing tail gate (herein after referred as gate 20). The tail gate (20) is mounted to an operative edge of the body frame (22a) by means of at least one check arm and at least one hinge. The check arm facilitates the gate (20) to rotate around one axis on the vehicle. To control the opening and the movement of the tail gate, a gas strut (28) is configured to be mounted in between an operative panel of the body frame (22a) of the vehicle and an operative edge of the tail gate (20).
The arrangement (100) for the controlled opening of the swing tail gate (20) of a vehicle (20) comprises at least one first ball and socket joint (24), at least one second ball and socket joint (26) and the gas strut (28). The gas strut (28) is configured to be mounted between the first ball and socket joint (24) and the second ball and socket joint (26).
In an embodiment, the first ball and socket joint (24) and the second ball and socket joint (26) are in a parallel plane.
Further, the gas strut (28) is defined by a hollow cylinder chamber (28c) filled with pressurized gas. An inner operative surface of the hollow cylinder chamber (28c) is provided with at least one trough profile (28f). The trough profile (28f) is configured to protrude from an inner surface of the cylinder chamber (28c) and is further configured to be in between the operative ends of the cylinder chamber (28c). A diaphragm type piston (28d) is configured to be fitted within the cylinder chamber (28c) and is further configured to move axially within the chamber (28c). A piston rod (28e) is configured to extend from an operative surface of the piston (28d). One end of the piston rod (28e) extends out from an operative end of the cylinder chamber (28c). The trough profile (28f) defines an intermediate rest position (28g) for the piston (28d) within the hollow cylinder chamber (28c). Thus, the piston (28d) moves within the cylinder (28c) from a contracted position to an extended position and stops at the proximity of the trough profile (28f) as the intermediate rest position (28g).
In an embodiment, the trough profile (28f) is made from a material selected from a resilience material, spongy or rubber material or any combination thereof.
In an embodiment, the trough profile (28f) is configured to be smooth and sloped on either side. The circumference of the trough profile (28f) is less than the thickness of wall of the cylinder chamber (28c).
Further, the first ball and socket joint (24) and the second ball and socket joint (26) are provided with a first portion and a second portion, the first portion is opposite to the second portion on the ball and socket joint (24, 26). The first portion of the first ball and socket joint (24) is configured to be mounted on an operative surface of a L-shaped bracket (30). The L-shaped bracket (30) is mounted to the lower edge of the body frame (22a) by means of a plurality of fastening means (34).
In an embodiment, the first ball and socket joint (24) is mounted perpendicular to a flange surface of the L-shaped bracket (30).
The first portion of the second ball and socket joint (26) is configured to be mounted on an operative lower edge of the swing tail gate (20) in an inverted manner. In an embodiment, the second ball and socket joint (26) is either screw fitted or push fitted to the operative lower edge of the swing tail gate (20). The first and second ball and socket joint (24, 26) has a ball-shaped head, which is attached to a cup-shaped cavity. Therefore, it allows the gas strut (28) a wider range of motion and also permits movements in all planes and rotational movement around the central axis.
In an embodiment, the first ball and socket joint (24) and the second ball and socket joint (26) are in a parallel plane.
Further, a first extremities of the gas-strut (28a) is defined along an operative end portion of the cylinder chamber (28c) and a second extremities of the gas-strut (28b) is defined along an operative end portion of the piston rod (28e). Therefore, the first extremities of the gas-strut (28a) is configured to be pivotably mounted to the second portion of the first ball and socket joint (24), and the second extremities of the gas-strut (28b) is configured to be pivotably mounted to the second portion of the second ball and socket joint (26).
In an embodiment, the first ball and socket joint (24) is configured to be mounted perpendicular to a flange surface of the L-shaped bracket (30), and the second ball and socket joint (26) is configured to be mounted parallelly to a plane of the swing tail gate (20).
Further, the piston (28d) is configured with at least one non-return valve (NR Valve) (32). The NR valve (32) facilitates the flow of pressurized gas therethrough under selective condition of the gas-strut operation. The non-return valve (32) is configured to open when the piston (28d) is allowed to be displaced from the intermediate rest position (28g) towards the extended position to facilitate gas to pass through the non-return valve (32).
Thus, when the piston (28d) rests at its initial contracted position, the swing tail gate (20) remains closed, and when the piston (28d) moves to the fully extended position within the cylinder (28c), the gate completely or fully opens. The intermediate rest position (28g) of the tail gate (20) or mid-position in between the closed position and the completely open position is achieved when the piston reaches to the proximity of the trough profile (28f). The difference in gas pressure on either side of the piston facilitates self-opening of the swing tail gate (20) firstly to the mid-position and then to complete opening of the swing tail gate (20).
In an operative condition of the gas strut (28), when the gate (20) initially opens, the piston moves within the cylinder from the contracted position till the intermediate rest position (28g) near to the proximity of the trough profile (28f). Therefore, during opening of the gate (20), due to pressure difference, the gas or hydraulic fluid flows through the clearance space available between the inner surface of the cylinder chamber (28c) and the operative surface of the piston (28d), and thus, it enables the self-opening of the tail gate (20) till the intermediate rest position (28g). The intermediate rest position (28g) is a location where the outward movement of the swing tail gate (20) is temporarily restrained; the restrained motion of the piston is being configured to be overcome by applying a manual force on the swing tail gate (20) to displace the piston (22d) beyond a peak of the trough profile.
In an embodiment, the gas strut (28) facilitates partial self-opening of the swing gate (20) till the intermediate rest position (28g) by providing initial predefined displacement to the swing tail gate (20) while opening. The initial predefined displacement is in the range of 4°-10°.
Further, when the piston (28d) reaches near to the proximity of the trough profile (28f), since there is no clearance available between the inner surface of the cylinder chamber (28c) and the operative surface of the piston (28d), therefore the NR valve (32) opens. The NR valve (32) allows the gas to pass across it to displace the piston (28d) further from the intermediate rest position (28g) towards the extreme position.
In an embodiment, the gas strut (28) facilitates complete self-opening of the gate from the intermediate rest position by providing a final predefined displacement to the swing tail gate in the range of 2°-6° at the intermediate rest position.
Further, the residual gas pressure generated during complete opening within the gas-strut facilitates the self-closing of the swing tail gate with little effort from the completely opened position.
In an embodiment, the gas strut is configured to facilitate the sidewardly swinging movement of the tail gate, by manipulating the pneumatic pressure. Advantageously, the gas strut is not constrained by packaging heights of the vehicle unlike a check-arm, and hence is not limited by constraints of space for leverage. Further, the gas strut (28) fits in the arcuate configuration of the tailgate, thereby overcoming the limitation put forward by the slider mechanism.
Since, the gas strut facilitates mid-stopping or the intermediate rest position to the tail gate at least at one position when the gate is moved from closed position to the completely open position, thereby preventing the gate from hitting any obstacle including trees, poles and other people in the vicinity.
In an embodiment, the self-opening of the tail gate takes place till 45° till the piston reaches near to the proximity of the trough profile, where the tail gate is first stopped. In another embodiment, the self-opening of the tail gate from the intermediate rest position takes place till 83°, where the tail gate is completely opened.
Further, the present disclosure also envisages a method of mounting arrangement for controlled opening of the swing tail gate (20). The method comprising the following steps:
• providing the at least one first ball and socket joint (24);
• mounting the at least one first ball and socket joint (24) on an operative surface of a body frame (22a) of the vehicle (22);
• providing the at least one second ball and socket joint (26);
• mounting the at least one second ball and socket joint (26) on an operative surface of the swing tail gate (20);
• providing the gas strut (28); and
• fitting the gas strut (28) between the first ball and socket joint (24) and the second ball and socket joint (26).
In an embodiment, the method further includes:
• allowing the piston to rest at an intermediate rest position (22g) defined by the trough profile (28f);
• restraining the temporary outward movement of the swing tail gate (20) at the intermediate rest position (22g);
• applying a manual force to overcome the restrained movement on the swing tail gate (22) to displace the piston (28d) beyond a peak of the trough profile (28f); and
• allowing the swing tail gate (20) to move from the intermediate rest position (22g) to a completely open position of the tail gate (20).
The foregoing description of the embodiments has been provided for purposes of illustration and not intended to limit the scope of the present disclosure. Individual components of a particular embodiment are generally not limited to that particular embodiment, but, are interchangeable. Such variations are not to be regarded as a departure from the present disclosure, and all such modifications are considered to be within the scope of the present disclosure.
TECHNICAL ADVANCEMENTS
The present disclosure described herein above has several technical advantages including, but not limited to, the realization of an arrangement for controlled opening of a swing tail gate of a vehicle, that:
• allow sideward swung;
• allow controlled movement of the gate between a closed position to a complete open position;
• is compact and unobtrusive;
• is easy to use;
• requires no adjustments, and operates reliably;
• automatically closes the door at a safe, controlled speed to avoid slamming the door shut;
• cushions the door as it approaches the door jamb to avoid injury to fingers or other body parts caught in the door;
• is inexpensive to manufacture and easy to install;
• prevents accidental hitting to the pedestrian; and
• facilitates self-closing of the door.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
The foregoing description of the specific embodiments so fully reveals the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other changes in the preferred embodiment as well as other embodiments of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation. ,CLAIMS:WE CLAIM:
1. An arrangement (100) for controlled opening of a swing tail gate (20) of a vehicle (22), said arrangement comprising:
• at least one first ball and socket joint (24) configured to be mounted to a body frame (22a) of the vehicle (22);
• at least one second ball and socket joint (26) configured to be mounted to an operative surface of the swing tail gate (20); and
• a gas strut (28) configured to be fitted between said first ball and socket joint (24) and said second ball and socket joint (26),
wherein said gas strut (28) is defined by:
o a hollow cylinder chamber (28c) filled with pressurized gas;
o a diaphragm type piston (28d) configured to move axially within said chamber (28c);
o a piston rod (28e) configured to extend from said piston (28d); and
o a trough profile (28f) configured between operative ends of said cylinder chamber (28c) and further configured to protrude within inner chamber of said cylinder (28c), said trough profile (28f) defining an intermediate rest position (22g) for said piston (28d) within said hollow cylinder chamber (28c) and thereby defining a location where the outward movement of the swing gate tail is temporarily restrained, said restrained motion of said piston (28d) being configured to be overcome by applying a manual force on the swing gate to displace said piston beyond a peak of said trough profile.
2. The arrangement (100) as claimed in claim 1, wherein said trough profile (28f) defines a peak and sloping wall on either side, and the circumference of said trough profile (28f) is less than the thickness of the wall of said cylinder chamber (28c).
3. The arrangement (100) as claimed in claim 1, wherein said first ball and socket joint (24) is configured to be mounted to the body frame (22a) by means of a L-shaped bracket (30).
4. The arrangement (100) as claimed in claim 3, wherein said first ball and socket joint (24) is configured to be mounted perpendicular to a flange surface of said L-shaped bracket (30), and said second ball and socket joint (26) is configured to be mounted parallelly to a plane of the swing tail gate (20).
5. The arrangement (100) as claimed in claim 4, wherein said first ball and socket joint (24) and said second ball and socket joint (26) are in a parallel plane.
6. The arrangement (100) as claimed in claim 1, wherein a first extremities of said gas-strut (28a) is defined along an operative end portion of said cylinder chamber (28c) and a second extremities of said gas-strut (28b) is defined along an operative end portion of said piston rod (28e), wherein said first extremities of said gas-strut (28a) is configured to be pivotably mounted to said first ball and socket joint (24), and said second extremities of said gas-strut (28b) is configured to be pivotably joined to said second ball and socket joint (26).
7. The arrangement (100) as claimed in claim 1, wherein said trough profile (28f) is selected from a resilience material, spongy or rubber material or any combination thereof.
8. The arrangement (100) as claimed in claim 1, wherein the movement of said piston (28d) till said intermediate rest position enables the opening of the swing tail gate (20) to a mid-position.
9. The arrangement (100) as claimed in claim 8, wherein the difference in gas pressure on either side of said piston (28d) facilitates self-opening of the swing tail gate (20) firstly to the mid-position and then to complete opening of the swing tail gate (20).
10. The arrangement (100) as claimed in claim 9, wherein the residual gas pressure generated during complete opening of the tail gate (20) within said gas-strut (28) facilitates self-closing of the swing tail gate (20).
11. The arrangement (100) as claimed in claim 1, wherein said piston (28d) is configured with at least one non-return valve (NRValve) (32) to facilitate the flow of pressurized gas therethrough.
12. The arrangement (100) as claimed in claim 11, wherein said non return valve (NR Valve) (32) is configured to open when said piston (28d) is allowed to be displaced from said intermediate rest position towards extended position to facilitate gas to pass through said non return valve (NR Valve) (32).
13. A method of. mounting arrangement for controlled opening of a swing tail gate, said method comprising the following steps:
• providing at least one first ball and socket joint (24);
• mounting said at least one first ball and socket joint (24) on an operative surface of a body frame (22a) of the vehicle (22);
• providing at least one second ball and socket joint (26);
• mounting said at least one second ball and socket joint (24) on an operative surface of the swing tail gate (20);
• providing a gas strut (28); and
• fitting said gas strut (28) between said first ball and socket joint (24) and said second ball and socket joint (26).
14. The method as claimed in claim 13, wherein said gas strut (18) includes:
• a hollow cylinder chamber (28c) filled with pressurized gas;
• a diaphragm type piston (28d) moving axially within said chamber (28c);
• a piston rod (28e) extending from said piston (28d); and
• a trough profile (28f) protruding between operative ends of said cylinder chamber (28c) within said cylinder chamber (28c).
15. The method as claimed in claim 14, further includes:
• allowing said piston to rest at an intermediate rest position (22g) defined by said trough profile (28f)
• restraining the temporary outward movement of the swing tail gate (20) at said intermediate rest position (22g);
• applying a manual force to overcome the restrained movement on the swing tail gate (20) to displace said piston (28d) beyond a peak of said trough profile (28f); and
• allowing the swing tail gate (20) to move from said intermediate rest position (22g) to a completely open position of the tail gate (20).

Dated this 23nd day of June, 2023

_______________________________
MOHAN RAJKUMAR DEWAN, IN/PA – 25
of R.K.DEWAN & CO.
Authorized Agent of Applicant

TO,
THE CONTROLLER OF PATENTS
THE PATENT OFFICE, AT CHENNAI