Pneumatic cylinder motor with end-of-travel cushioning mechanism

Details Pneumatic cylinder motor with end-of-travel cushioning mechanism Pneumatic cylinder motor with end-of-travel cushioning mechanism

1984-09-13

1987-10-20

Garrett, Robert E.

Motors: expansible chamber type

Working member position responsive motive fluid control

Exhaust control

91443, 91471, 91519, 92 11, 92 85B, 188284, 188286, F15B 1522, F15B 1100, F01B 1102, F16F 948

Patent

active

047006110

ABSTRACT:
A cushioning mechanism in a pneumatic cylinder utilizing a supplied air pressure, and a method of cushioning a piston in the pneumatic cylinder. Cushioning chambers are provided at opposite ends of a cylinder body of the pneumatic cylinder. Respective differential pressure valves and relief valves are provided between each of the cushioning chambers and an air supply. A cushioning member is disposed between each cushioning chamber and a cylinder bore. Air supplied under pressure from the air supply is stored in one of the cushioning chambers. When the piston is displaced to push the cushioning member, the air in the cushioning chamber is compressed to cushion the piston. As the cushioning member is moved a prescribed interval, the cushioning chamber is vented to atmosphere.

REFERENCES:
patent: 2430597 (1947-11-01), Acton
patent: 3476014 (1969-11-01), Churchill et al.
patent: 4195552 (1980-04-01), Neff
patent: 4208879 (1980-06-01), Segawa
patent: 4210064 (1980-07-01), Beerens
patent: 4216700 (1980-08-01), Iida
patent: 4240620 (1980-12-01), Tunkers
patent: 4241632 (1980-12-01), Seo
patent: 4262695 (1981-04-01), Iizumi
patent: 4455923 (1984-06-01), Muller
patent: 4500075 (1985-02-01), Tsuchiya et al.
Yeaple, F. D. Hydraulic and Pneumatic Power and Control, McGraw Hill Book Co.; New York, N.Y. 1966, pp. 263-270, 272-273.

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