The present invention relates to a protection safety shield assembly for heavy duty vehicles such as industrial lifting trucks, lorry cranes, tractors and alike. More particularly, a protection safety shield to protect the operator of heavy duty vehicles in working condition of a vehicle and fold the shield in non working condition and thus prevents it from getting damaged in the uneven or sloped regions.
Background of Invention
Heavy weights lifting trucks are employed in industrial applications generally to lift and move industrial products from one location to another. Usually in the mechanical industry, when lifting or moving heavy weights or loads, exposes the operator of the machine like lorry to danger of getting seriously injured due to accidents, since these load lifting machines routinely have an open operator area without any protective screening or materials separating the operator from the material being handled.
Various protective devices have been designed for different vehicles to protect the operators from bodily harm. Tractors have had attachable cabs designed to be mounted to the vehicles in front of the operator's seat to protect the operator from wind and to deflect engine heat away from the operator. Tractors or bulldozers that are in danger of being struck by falling objects, such as trees or portions of buildings, have had protective covers mounted to the vehicles to deflect objects away from the operator's compartment and to protect the operator from injury. Similarly, forklifts have had overhead guards installed to protect their operators from falling objects. Motorcycles have had transparent bulletproof windshields designed to protect the drivers. However, no design has provided a readily foldable shield that moves with the material handling apparatus to be constantly inter-positioned between the materials being handled and the operator.
In prior art available solutions, there is no seating provision for Operator & very poor visibility during load handling while slewing 360 degree since Operator has to stand on side of the machine while doing crane operation. This also tends to occurrence of accidents.

This problem of the lack of safety/ protection for machine operators is solved by the apparatus comprised in the present invention.The current invention provides safety to operator giving the choice of using front protection shield when machine is in working condition & easily folding front protection shield when machine is not lifting any load.
Objective and Summary of the Invention
The main objective of the present invention is to overcome the limitations of the prior art. The current invention is generally related to industrial lifting trucks including lorry crane and the like and it deals with a foldable front protection safety shield for the operator of vehicle.
An objective of the present invention is to provide a protection safety shield for heavy duty vehicles, which prevents the them from getting crushed both in case of heavy bodies falling upon the them, and in case of tilting of the vehicle about a longitudinal axis, which may occur, in particular, in workplaces where the ground is uneven or sloped, such as in quarries, and the like.
Another objective of the present invention is to provide a protection safety shield for heavy duty vehicles that provides safety to operator with a choice of using front protection shield when crane is in working condition & folding the shield when not lifting the load and the machine is being taken from one site to another.
Another objective of the present invention is to provide a protection safety shield for heavy duty vehicles allowing 360 degree visibility for the operator sitting comfortably on rotating superstructure mounted cabin.
Yet another objective of the present invention is to provide a protection safety shield for heavy duty vehicles with components: a V —belt pulley shaft, Crank lever, Crank handle, Spur gear at both sides, sliding spur gear rack on the both sides, locking lever, locking spur gear and a protection shield.
Yet another objective of the present invention is to provide a protection safety shield for heavy duty vehicles are made of materials using IS2062-2006; E250(Fe410W) 'B', IS:5429-1979 & NYLATRON/NSM.

Yet another objective of the present invention is to provide a method of working of the protection safety shield with internal mechanism with following steps:
1. Crank lever engages to V -belt pulley shaft, such that the Crank fever rotate in the Clock wise direction;
2. Spur gear at both sides will also rotate clock wise direction and spur gear also engages with the sliding spur gear rack on the both sides;
3. Thereafter, the sliding spur gear racks move upward, simultaneously with the racks fixed with the protection shield also moves upward direction;
4. When the protection shield reaches the desired position to the operator by rotating the crank lever locking lever slightly rotate upward to relieve from slot and pull RHS and put in the second slot to lock the protection shield;
5. Same exercise will be repeated for protection shield to move Home position.
These and other objectives of the present invention will be apparent from the drawings and descriptions herein. Every object of the invention is attained by at least one embodiment of the invention. However, no embodiment necessarily meets every object set forth herein.
Brief description of the Invention
The present invention will be described in more detail hereinafter with the aid of the description which relates to preferred embodiments of the invention explained with reference to the accompanying schematic drawings, in which:
Figure 1 illustrates the side view of the protection shield with respect to the operator cabin of the invention outlining various components of the shield.
Figure 2 illustrates the front view of the shield of the invention in the open position.
Figure 3 illustrates the back view of the shield of the invention in the open position.
Figure 4 illustrates the back view of the shield of the invention in the folded/ closed position.

Figure 5 illustrates the side view of the protection shield assembly of the invention with respect to the position of the boom and the operator cabin in a lorry crane.
Detail Description of the Invention
The basic invention and the general field of the invention is described and illustrated herein below with certain schematic drawings and schematic scheme(s) associated with the construction and functioning of the proposed foldable protection shield for the operator of the vehicle.
The industrial lifting trucks including lorry crane have boom assembly without an operator cabin such that the operator often handling the machine is at a risk of accident due to falling of heavy weights. In prior art available solutions, there is no seating provision for operator & offers poor visibility during load handling while slewing 360 degree. Generally, the operator has to stand on side of the machine while handling the machine or crane operation. This often leads to occurrence of fatal accidents.
The current invention aims at providing a foldable front protection safety shield for an open operator cabin of vehicle including various cranes with boom assembly. The protection safety shield provided herein is for open cabin of a lorry crane, which prevents the cabin from getting crushed both in case of heavy bodies falling upon the cabin, and in case of tilting of the vehicle about a longitudinal axis, which may occur, in particular, in workplaces where the ground is uneven or sloped, such as in quarries, and the lilte. Further the protection safety shield provides safety to operator with a choice of using front protection shield when crane is in working condition & folding the shield when not lifting the load and the machine is being taken from one site to another. The invention shield allows 360 degree visibility for the Crane operator sitting comfortably on rotating superstructure mounted cabin.
Basically Lorry crane is high speed 360 degree rotational crane with carry deck facility. Such crane is very useful where one has to shift load from one place to other in short interval of time. In the invention crane, when the operator wants to lift load through crane, he climbs up & sit in open cabin, unfolds or opens the protection shield & then use the crane for loading & unloading purpose. After completion of his work the operator folds the protection shield & gets down from the cabin seat to ground. Basically the locking lever at unlock position is

released and then Crank lever is operated to move the protection shield up. Further the crank lever is held till again locking lever is moved to the lock position.
In a preferred embodiment of the invention the protection safety shield is provided with 5 components: a V -belt pulley shaft, Crank lever, Crank handle, Spur gear at both sides, sliding spur gear rack on the both sides, locking lever, locking spur gear and a protection shield and is made of materials using IS2062-2006; E250(Fe410W) 'B', IS:5429-1979 & NYLATRON/NSM and/or the combination of these materials enlisted herein.
10 In another preferred embodiment of the invention the method of working of the protection safety shield with internal mechanism with following steps:
• Engaging a crank lever to V -belt pulley shaft, such that said Crank lever rotate in
Clock wise direction;
15 • Rotating a spur gear at both sides of assembly in clock wise direction and spur gear
also engages with the sliding spur gear rack on the both sides;
• Said sliding spur gear racks move upward, simultaneously with the racks fixed with
the protection shield also moving in the upward direction;
• Rotating the crank lever locking lever slightly rotate upward to relieve from slot and
20 pull RHS and put in the second slot to lock the protection shield when the protection
shield reaches the desired position to the operator;
• Same exercise will be repeated for protection shield to move back to home position.
Referring now to the figures with the Figure 1 illustrating the side view of the protection 25 shield with respect to the operator cabin outlining various components of the shield; including a Crank lever (1), Spur gear (2), sliding spur gear rack (3), locking lever 0(4), locking spur gear (5), a protection shield (6), V -belt pulley shaft (7), Crank handle (8).
Figure 2 illustrating the front view of the shield of the invention in the open position 30 including a protection shield (6) in an open or unfolded position providing protection to the operator as shown herein.
6

Figure 3 illustrating the back view of the shield of the invention in the open position including a protection shield (6) in an open or unfolded position providing protection to the operator as shown herein.
Figure 4 illustrating the back view of the shield of the invention in the folded/ closed position; including the locking lever (4) used in the invention to lock the shield in open position and Crank handle (8) used operate the shield in unfolded / folded position as desired.
Figure 5 illustrating the side view of the protection shield of the invention with respect to the position of the boom and the operator cabin in a lorry crane.
Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternate embodiments of the invention, will become apparent to persons skilled in the art upon reference to the description of the invention. It is therefore contemplated that such modifications can be made without departing from the spirit or scope of the present invention as defined.

We Claim:

A protection safety shield (6) for heavy duty vehicles comprises of:
• a crank lever (1);
• a spur gear (2);
• a sliding spur gear rack (3);
• a locking lever (4);
• a locking spur gear (5);
• a V-belt pulley shaft (7); and
• a crank handle (8);
wherein said protection shield (1) is a foldable shield.
A protection safety shield (6) for heavy duty vehicles as claimed in claim 1, wherein said protection shield (6) is used when the vehicle lifts the load and folds when the vehicle does not carry any load.
The method of working of the protection safety shield (6) for heavy duty vehicles as claimed in claim 1 comprising steps :
• engaging said crank lever (1) to said V-belt pulley shaft (7);
• rotating said spur gear (2) at both sides of said shield (6) in clock wise direction;
• moving upwards said sliding spur gear rack (3);
• locking said protection shield(6);
wherein said crank lever (1) rotates in clock wise direction when said crank lever (1) is engaged with said V-belt pulley shaft(7). Said spur gear (2) rotates in clock wise direction and said sliding spur gear rack (3) moves in upward direction.
The method of working of the protection safety shield (6) for heavy duty vehicles as claimed in claim 3, wherein said protection shield (6) comes to a locked condition by rotating said crank lever (1) and said locking lever (4) in upward direction to relieve from a slot and pull it to right hand side, thereafter putting it in a second slot.

The method of working of the protection safety shield (6) for heavy duty vehicles as claimed in claim 3, wherein said spur gear (2) is engaged with said sliding spur gear rack (3).
The method of working of the protection safety shield (6) for heavy duty vehicles as claimed in claim 3, wherein said protection shield (1) moves back to initial position by repeating steps of bringing it to the locking condition.
The protection safety shield (6) for heavy duty vehicles as claimed in claim 1, wherein said protection shield (6) provides 360 degree visibility to the operator.
The protection safety shield (6) for heavy duty vehicles as claimed in claim 1,
wherein said heavy duty vehicles are selected from industrial lifting trucks, lorry
cranes and tractors.