FIELD OF APPLICATION
The present invention relates to a remote controlled pneumatically operated top
lids and rear cover of a tanker carrying dusty products like lime dust, etc.
BACKGROUND OF THE INVENTION
Pouring and dispensing lime dust into lime tanker (RMH-102) from different
bunkers is a difficult task especially in rainy season. To pour lime dust, a person
has to climb on top of lime tanker and then he has to open two heavy metallic
top covers one by one. At the time of dumping at site he has to come at rear of
the hutch and open several mounting bolts manually. This is also a difficult task
because opening and closing of those bolts in rusted condition require
considerable manual effort.

SUMMARY OF THE INVENTION
The main object of the present invention is to provide pneumatically operated
top and rear lids of a tanker which can be opened and closed from a remote
position.
This object can be achieved by moving antifriction sliders using a pair of
pneumatic cylinders.
Thus the present invention provides a remote controlled pneumatically operated
top lids and rear cover opener and closer (A) of a tanker comprising:
pneumatically operated horizontally sliding doors for opening / closing
the top lids;
pneumatically operated C-clamps for locking and unlocking the rear
cover; and
two pairs of double acting pneumatic cylinders, each pair of said
cylinders pivotally mounted on said tanker top and the rear cover
respectively for automatically opening and closing said top lids and
said rear covers.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The present invention can now be described with reference to the figures of the
accompanying drawings where
Figure 1 shows the sliding shield of the present invention for the tanker.
Figure 2 shows an air circuit diagram for the sliding shield of the
present invention.
Figure 3 shows the 'C' clamp arrangement for locking the rear lid of the tanker.

DETAILED DESCRIPTION
The known method of closing and opening of the top and rear lids of a lime
tanker is a manually operated method.
In the present invention a pneumatic door opener and closer (1A) provides
motive power for opening and closing a door (11). For top lid operation two
numbers double acting pneumatic cylinders (1.2) pivotally mounted on the
tanker and its arm (1.3) is coupled to horizontal sliding doors (1.1). For rear
cover two numbers similar double action pneumatic cylinders are pivotally
mounted on the rear lid and their arms are coupled with a specially designed 'C'
clamp (3.1) to lock the rear cover. The arrangement of the 'C' clamp locking is
illustrated in Figure 3.

For top door operation the cylinder (1.2) apply a force to the top sliding covers
(1.1) in one direction to open the doors and in the opposite direction to close the
doors. For rear door operation the pneumatic cylinders mounted in rear lid apply
force in one direction to unlock the rear lid and in opposite direction to lock the
rear cover.
The sliding shield or cover and its air circuit diagrams are illustrated respectively
in Figures 1 and 2.
As best seen in Fig. 2, an air tank (2.1) holds air at the elevated pressure. The
pressurized air is fed through an air flow regulator (2.2) to a direction control
valve (2.2) which is mounted on the driver's cabin of the tanker Double acting air
cylinder (1.2) has a piston which is movable in opposite directions depending
upon which direction is chosen by the operator through the direction control
valve (2.3). The piston is connected to the arm (1.3) which can move the sliding
door (1.1) in opposite direction.
The near lid also has two similar double acting pneumatic cylinders (not shown)
which operates the 'C' clamps (3.1) to either lock or unlock the rear cover.

WE CLAIM:
1. A remote controlled pneumatically operated top lids and rear cover opener
and closer (A) of a tanker comprising:
pneumatically operated horizontally sliding doors (1.1) for opening
/ closing the top lids;
pneumatically operated C-clamps (3.1) for locking and unlocking
the rear cover; and
two pairs of double acting pneumatic cylinders (1.2), each pair of said
cylinders pivotally mounted on said tanker top and the rear cover
respectively for automatically opening and closing said top lids and
said rear covers.

2. The pneumatically controlled opener and closer (A) as claimed in claim 1,
wherein said first pair of double acting pneumatic cylinders are provided with
arms (1.3) coupled with horizontal sliding doors (1.1) for opening or closing the
doors.
3. The pneumatically controlled opener and closer as claimed in claim 1,
wherein said second pair of double acting pneumatic cylinders are provided with
arms which are coupled with specially designed C-clamps (3.1) to lock or unlock
the rear covers for closing or opening the rear covers.
4. A remote controlled pneumatically operated top lids and rear cover opener
and closer of a tanker, substantially as herein described and illustrated in the
accompanying drawings.