DESC:FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

Title of invention:
A WIPER LINKAGE SYSTEM FOR A VEHICLE

Applicant:
BEML Limited
A company Incorporated in India under the Companies Act, 1956
Having address:
BEML Soudha, 23/1, 4th Main,
Sampangirama Nagar, Bengaluru - 560 027,
Karnataka, India

The following specification particularly describes the invention and the manner in which it is to be performed.

CROSS-REFERENCE TO RELATED APPLICATIONS AND PRIORITY
[001] The present invention claims priority from Indian patent application numbered 202041006207 filed on 13 February 2020.

TECHNICAL FIELD
[002] The present invention relates to a wiper system and more particularly relates to a wiper linkage arrangement for a split type windshield of a vehicle.

BACKGROUND
[003] A windshield wiper for an automobile usually has a constant wiping radius because its pivotal center is fixed. The far corner of a windshield cannot be cleaned by the usual windshield wiper though it is desired to wipe a large area to secure a good view for a driver. The majority of automotive windscreen wiper devices, or wiper blades, can be categorized as either conventional-style wiper blades or beam-style wiper blades. Conventional blades typically include an elongated wiper strip; at least one carrier element and a frame structure with a connecting device for attachment to a wiper arm, a plurality of linkages and a plurality of claws. The carrier elements are generally linearly shaped when in a relaxed state, and the frame structure distributes a force from a wiper arm across the lengths of the carrier elements and the wiper strip while allowing the carrier elements and wiper strip to flex and conform to the curvature of a vehicle's windshield. This establishes a seal between the wiper strip and the windshield. Conventional and beam blades may not always exhibit a uniform pressure distribution against the windshield across the length of the wiper strip
[004] The automobiles are equipped with windshields or wind screens wipers that are adapted to move in a back and forth or to and fro motion to sweep across a major portion of the windshield and remove the water over the windshield. The present design is to wipe the required area of the windshield, which is split type in between driver and co-driver and height of the windshield is very small compared to the width of the windshield, so the regularly available wiper system cannot be used to fulfil the requirements of the wiper system.

OBJECT OF THE INVENTION
[005] The main object of the invention is to develop a linkage arrangement to wipe required area of windshield the of a vehicle as per Automotive Industry Standards.
[006] Another object of the invention is to provide split type windshield with separate wiper linkage arrangement.
[007] Yet another object of the invention is to provide wiper linkage system for a windshield where the height of the windshield is very small compared to the width of the windshield.
[008] Yet another object of the invention is to synchronize operation of both the motor to wipe windshield with a single switch operated from a driver cabin.

SUMMARY
[009] Before the present system and method are described, it is to be understood that this application is not limited to the particular machine or an apparatus, and methodologies described, as there can be multiple possible embodiments that are not expressly illustrated in the present disclosure. It is also to be understood that the terminology used in the description is for the purpose of describing the particular versions or embodiments only and is not intended to limit the scope of the present application. This summary is provided to introduce aspects related to a method to develop a linkage arrangement for a wiper system for an off-highway vehicle, and the aspects are further elaborated below in the detailed description.
[0010] In one implementation, a linkage system and method to develop a linkage system for a wiper system for a vehicle is disclosed. The linkage system for the wiper contains two modular type wiper systems with a dual wiper blades operated separately with two motors. Two motors are synchronized to run with a single switch operated from a driver cabin. The wiper linkage driven by the motor is designed to modify the wiping area as required for cleaning required area of windshield. Further, a linkage system comprises of a motors that is selected to meet the frequency at low and high speeds and a stall test requirement. The linkage system further comprises of wiring harness with necessary relays to run both the motors with a single switch.

STATEMENT OF INVENTION
[0011] Accordingly, the present invention discloses a wiper linkage system for windshield of vehicle comprising of; atleast one dual wiper blade for cleaning the windshield, atleast one linkage configured to clean required area of windshield, and atleast one motor for operating the wiper linkage system.

[0012] Accordingly, the present invention discloses a windshield, which is a split type windshield where the height of the windshield is smaller than the width. Further, motor is configured to synchronize the operation of both the dual wiper blade to completely wipe windshield with a single switch operated from a driver cabin.

BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The foregoing summary, as well as the following detailed description of embodiment, is better understood when read in conjunction with the appended drawing. For the purpose of illustrating the disclosure, there is shown in the present document example constructions of the disclosure, however, the disclosure is not limited to the specific methods and apparatus disclosed in the document and the drawing.
[0014] The detailed description is described with reference to the accompanying figure. In the figure, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawing to refer like features and components.
[0015] Figure 1 illustrates a schematic for wiper linkage system, according to an embodiment of the present subject matter.
[0016] Figure 2 illustrates a dual wiper blade linkage arrangement for one side of split windshield.
[0017] Figures depicts various embodiments of the present disclosure for purpose of illustration only. Only skilled in the art will readily recognize from the following discussion 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
[0018] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words “comprising”, “having”, and “including,” and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. Although any systems and methods similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary, systems and methods are now described. The disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms. .
[0019] Various modification to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to another embodiment. However, one of ordinary skill in the art will readily recognize that the present disclosure is not intended to be limited to the embodiments illustrated but is to be accorded the widest scope consistent with the principles and features described herein..
[0020] The windshield for a vehicle is split between a driver and a co-driver. Further, the height of the windshield is smaller than the width of the windshield. The existing wiper systems may not fulfil the requirement of the wiper system. Hence, the present invention discloses a two modular type wiper system with a dual wiper blade. Each modular type wiper system is used on driver and co-driver windshield that is operated separately with two motors. The motors are synchronized to run with a single switch operated from driver cabin. The wiper linkage driven by the motor is designed to modify the wiping area as required for cleaning required area of windshield. Further, a linkage system comprises of a motors that is selected to meet the frequency at low and high speeds and a stall test requirement. The linkage system further comprises of wiring harness with necessary relays to run both the motors with a single switch. The switch is provided with various speed option like intermediate, low and high speeds to operate the motor.
[0021] The vehicle wiper linkage system with its linkage arrangement is designed to meet requirements of central motor vehicle rules (CMVR) for M3 category of vehicle like wiping area, frequency at different speeds and stall test as per the standards. The wiper linkage driven by the motor is designed to modify the wiping area as required for cleaning required area of windshield.
[0022] Figure 1 shows a wiper linkage system (100) is positioned on a windshield (10) of an vehicle hull (30). Further, from the figure it is observed that the wiper system contains dual wiper blade assembly (20) and a respective motor (40) for operating the dual wiper blade assembly (20). The operating motors (40) are synchronized to run with a single switch operated from driver cabin.
[0023] Figure 2 shows a dual wiper blade assembly (20) arrangement for one side of split windshield (10) comprising of linkage (30) and motor (40).
[0024] Further, the invention can be used, but not limited to, in the following applications.
[0025] Exemplary embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these advantages may include those provided by the following features.
[0026] Some embodiment may help to wipe a required area of a windshield of an Off highway vehicle as per Automotive Industry Standards.
[0027] REFERRAL NUMERALS:

Element Description Reference Numeral
windshield 10
Dual wiper blade assembly 20
linkage 30
motor 40
Vehicle hull 50
Wiper linkage system 100

,CLAIMS:
1. A wiper linkage system (100) for windshield (10) of vehicle comprises;
atleast one dual wiper blade assembly (20) configured for cleaning the windshield (10),
atleast one linkage (30) configured for movement of wiper arm for covering the required windshield area, and
atleast one motor (40) for operating the wiper linkage system (100).

2. A wiper linkage system (100) for windshield (10) of vehicle as claimed in claim 1, wherein said linkage (30) is configured for connecting motor output to wiper blade for wiping require area of windshield (10).

3. A wiper linkage system (100) for windshield (10) of vehicle as claimed in claim 1, wherein said linkage (30) is configured for adjusting the stroke and position of the wiper blade for wiping required area of windshield (10).

4. A wiper linkage system (100) for windshield (10) of vehicle as claimed in claim 1, wherein said windshield (10) is configured to be a split type windshield with the height of the windshield (10) is comparatively smaller than the width.

5. A wiper linkage system (100) for windshield (10) of vehicle as claimed in claim 1, wherein said motor (40) is configured to synchronize the operation of the dual wiper blade assembly (20) to wipe required area of windshield (10) with a single switch operated from the driver cabin.