External pneumatic cushion system for air cylinder
AssigneeDenis Comact Chicoutimi Inc.
InventorsAndr{acute over (e)} Gagnon, Gilles Harvey
Life of this patent
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Abstract
A system by which the air exhausted from either end of a pneumatic cylinder is directed, by an arrangement of control valves, to external surge tanks of appropriate volume where it is compressed to produce a deceleration effect at the end of each stroke before being released to the atmosphere.
Claims6
A system for producing a controlled deceleration of piston travel, at either or both ends of a piston stroke, in an air cylinder having pressure/exhaust ports, and being used to move an external load in a mostly linear path, said system comprising:
- a) an air pressure supply line to the pressure/exhaust ports of said cylinder;
- b) control valve means in said supply line causing piston travel and stroke reversal on receipt of an electrical signal;
- and
- c) an exhaust circuit for each cylinder port including a pressure surge tank, admission and venting valve means connected to said surge tank;
- said admission and venting valve means causing back pressure to be applied against said piston travel or vented to the atmosphere on receipt of an electrical signal;
- said control valve means and said admission and venting valve means causing start and reversal of said piston travel and a controlled deceleration thereof.
A system for producing a deceleration near one or both ends of the piston stroke of an air cylinder adapted for displacing a load, said cylinder having pressure/exhaust ports, said system comprising:
- a) means providing electrical signals in response to position of the load;
- b) control valve means activated by said signals and connected to said cylinder to reverse working pressure and piston travel;
- c) pressure surge tanks receiving exhaust air selectively from either port of said cylinder through admission valve means activated by said signals;
- d) venting valve means connected to said surge tanks to cause build up or release of back pressure generated at each piston stroke, said venting valve means being actuated simultaneously with said control valve means by said electrical signals.
Dependencies are inferred from the claim text.