DESC:FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
AND
The Patents Rules, 2003

COMPLETE SPECIFICATION
(Section 10 and Rule 13)

TITLE
MECHANICAL STEERING LOCK DEVICE

APPLICANT
(a) BEML LTD.
(b) An Indian Company,
(c) BEML Soudha,
No 23/1, IV Main, Sampangiramanagar,
Bengaluru, Karnataka, India

PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed.
FIELD OF THE INVENTION
This invention relates to a mechanical steering lock device. Particularly this invention relates to a mechanical steering lock device for use in trucks to lock steering. More particularly this invention relates to a mechanical steering lock device for use in dump trucks to lock the steering.
STATE OF THE ART IN THE FIELD
Dump trucks are used to transport excavated earth and rocks from the mines and the operator/driver has to do regular inspections in and around the dump truck while the engine is running. Sometimes instances of the unintentional operation of the steering wheel happen while the operator is standing near the truck or in between the tire and frame and it turns out to be hazardous for the operator. Therefore, to prevent such happening, a device comprising a tubular structure, having a pair of halves, adapted to lock the steering cylinder is provided for arresting the steering stroke of the steering cylinder. Another device known in the prior art, for locking steering of the truck, comprises lugs adapted to be secured to the steering tierod, steering arm and a pin used to lock these two components (lugs and tierod).
There are disadvantages associated with the conventional devices used for locking steering of a truck. One of the disadvantages is that each half of the tubular structure is very heavy for a single person to handle and lock the steering cylinder on both sides.
Another disadvantage associated with the conventional device is that locking of the steering cylinder is a time-consuming and thus lengthy process.
Yet another disadvantage associated with the conventional device is that the pin used to lock the lug with the tierod has chromium-plated surface and therefore the cost of the device is increased much fold.
OBJECTS OF THE INVENTION
Therefore, an object of the present invention is to provide a mechanical steering lock device which obviates the disadvantages associated with the prior art system.
Another object of the present invention is to provide a mechanical steering lock device which is light in weight and easy to use for locking the steering while the engine of the trucks is running.
Yet another object of the present invention is to provide a mechanical steering lock device which is carried with the truck itself and that too in close proximity to the place of application.
Still another object of the present invention is to provide a mechanical steering lock device which is not a costly device and easy to manufacture.
A further object of the present invention is to provide a mechanical steering lock device that can be used, by a single person, to lock the steering.
SUMMARY OF THE INVENTION
According to this invention, there is provided a mechanical steering lock device comprises a locking plate adapted to be secured on a steering arm such that to lock operational end of the tie-rod so as to lock steering of the vehicle, plurality of holes being provided with the locking plate to facilitate securing of the locking plate with the steering arm by securing means.
BRIEF DESCRIPTION OF THE DRAWINGS
A mechanical steering lock device, according to a preferred embodiment, is herein described and illustrated in the accompanying drawings, wherein;
Figure 1, illustrates the steering lock device in an installation/locking position.
Figure 2, illustrates the steering lock device in a storage position.
DESCRIPTION OF THE INVENTION
A mechanical steering lock device is herein described with numerous specific details so as to provide a complete understanding of the invention. However, these specific details are exemplary details and should not be treated as the limitation to the scope of the invention. Throughout this specification the word “comprise” or variations such as “comprises or comprising”, will be understood to imply the inclusions of a stated element, integer or step, or group of elements, integers or steps, but not the exclusions of any other element, integer or step or group of elements, integers or steps.
Referring to the drawing, figure - 1, a mechanical steering lock device in the installation position is shown. The present invention comprises a locking plate (1) having a U shaped cut provided at one corner of the plate such that to make it suitable to lock the steering of the dump truck/ truck. The locking plate (1) is mounted on a steering arm (2) of the front axle of the vehicle. A plurality of holes provided on the plate (1) and a plurality of threaded holes provided on the steering arm (2) to mount the locking plate (1) thereon. Three holes (4, 5 & 6) with three bolts are provided on the left-hand side of the U shaped cut at the corner of the plate (1) such that to facilitate securing the locking plate (1) to lock the operational end of the tie-rod (3) of the steering. The U shaped cut is completely fitted with the operational end of the tie-rod (3). A hole (7) of the locking plate (1) and steering arm is vacated in the installation position. A handle (8) is provided on the side of the hole (7) such that to facilitate handling of the locking plate easily.
Referring to the drawing, figure - 2, a mechanical steering lock device in the storage position is shown. The locking plate (1) turned to the storage position on the steering arm (2) such that two holes (4, & 6) with two bolts are provided on the left-hand side of the U shaped cut corner of the plate (1) and the hole (5) is vacated. The hole (7) with a bolt of the hole (5) is provided on the right-hand side of U shaped cut corner of the plate (1) such that to facilitate securing the locking plate (1) on the steering arm (2). In both positions, only three bolts are used to avoid unnecessary storage of the bolts.
A mechanical steering lock device is mounted on the steering arm of both side front axles of the vehicle by use of bolts in the storage condition. Whenever a vehicle needs to lock the steering, the Steering lock device is secured at the locking position easily by using the same bolts in storage condition.
Certain features of the invention have been described with reference to the exemplary embodiments. However, the description is not intended to be construed in a limiting sense. Various modifications of the exemplary embodiments as well as other embodiments of the invention, which are apparent to the persons skilled in the art to which the invention pertains, are deemed to lie within the spirit and scope of the invention.
,CLAIMS:WE CLAIM:
1. A mechanical steering lock device comprises a locking plate (1) adapted to be secured on a steering arm (2) such that to lock operational end of the tie-rod (3) so as to lock steering of the vehicle, plurality of holes (4, 5, 6 & 7) being provided with the locking plate (1) to facilitate securing of the locking plate with the steering arm (2) by securing means.
2. The mechanical steering lock device as claimed in claim 1, wherein the locking plate is of U shape.
3. The mechanical steering lock device as claimed in claim 1, wherein the securing means are, for example, bolts adapted to be secured in threaded holes provided in the steering arm.
4. The mechanical steering lock device as claimed in claim 1, wherein a handle (8) is provided on one side of the locking plate to facilitate handling of the locking plate (1).

Dated this 27th day of March, 2020

R. P. Yadav
IN/PA – 954
of sr4ipr Partners
Applicant’s Attorney