Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1974-10-24
1976-06-15
Cohen, Irwin C.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
91447, 91468, 91DIG2, F15B 13042, F16K 3136, F16K 31122
Patent
active
039630455
ABSTRACT:
A control apparatus for use with cylinder assemblies for cushioning the piston as it reaches the end of its stroke so as to control the speed at which the piston approaches the cylinder ends and to prevent damage to the cylinder assembly. The control apparatus includes a body which has an inlet port that is adapted for connection to the cylinder assembly and an outlet port that is aligned with the inlet port and is adapted to vent to atmosphere or for line connection. An expansion chamber is provided within the body and includes a valve for controllably venting the chamber. A first passageway connects the inlet port, outlet port and expansion chamber, and a second passageway connects the inlet port and the first passageway for controlling flow between the inlet port and expansion chamber. A spool-type valve element is provided which moves within the first passageway and controllably opens and closes the inlet port in response to the pressure in said expansion chamber so as to create the cushion in the cylinder. The air pressure in the chamber slowly vents through the valve means in the expansion chamber so as to permit controlled seating of the piston in the cylinder.
REFERENCES:
patent: 2051732 (1936-08-01), McKee
patent: 2541464 (1951-02-01), Davies
patent: 2823648 (1958-02-01), Wood
patent: 3016046 (1962-01-01), Backofen
patent: 3072107 (1963-01-01), Cassell
patent: 3138174 (1964-06-01), Gilpin
patent: 3227179 (1966-01-01), Rosaen
patent: 3563262 (1971-02-01), Wood
patent: 3575204 (1971-04-01), McMurry
Cohen Irwin C.
Geren Gerald S.
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