Valves and valve actuation – Fluid actuated or retarded – Dashpot or fluid controlled retarder or timer
Patent
1988-01-29
1989-10-10
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
Dashpot or fluid controlled retarder or timer
251 614, 251 615, 251122, 251331, 251333, 2513352, 251360, F16K 31126, F16K 31122
Patent
active
048726389
ABSTRACT:
A slow acting pneumatically operated valve which uses gas pressure and/or pneumatic pressure acting on a diaphragm to counteract the force of a coiled spring, thereby activating a double tapered fluorocarbon plastic poppet against a fluorocarbon plastic valve seat. Actuation of the poppet must be extremely slow and uniform such that fluid in the affected supply line does not experience shocks which can be transmitted to other supply line components. Actuation speed is restricted by use of a damping piston attached to the opposite end of the poppet stem, which restricts the flow of hydraulic fluid to opposite sides of the piston chamber during an actuation cycle. The double taper poppet incorporates an extremely low angle of incidence to the valve seat. Valve opening increases very slowly during the initial opening travel and decreases slowly during final closing travel, thereby further reducing the potential for fluid system shocks.
REFERENCES:
patent: 1115244 (1914-10-01), Reynolds
patent: 1223326 (1917-04-01), Marsh
patent: 1874135 (1932-08-01), Spoor
patent: 1911905 (1933-05-01), Knowlton et al.
patent: 2528822 (1950-11-01), Dunn
patent: 2579334 (1951-12-01), Plank
patent: 2655041 (1953-10-01), Jacobsson
patent: 2675204 (1954-04-01), Johnson
patent: 2985424 (1961-05-01), Anderson et al.
patent: 3367367 (1968-02-01), Moriyama
patent: 3620251 (1971-11-01), Bowen
patent: 3661175 (1972-05-01), Tillman
patent: 3730215 (1973-05-01), Conery et al.
patent: 3732889 (1973-05-01), Conery et al.
patent: 3850405 (1974-11-01), White
patent: 3853145 (1974-12-01), Judd
patent: 4180239 (1979-12-01), Valukis
patent: 4535967 (1985-08-01), Babbitt et al.
patent: 4721284 (1988-01-01), Banhard
Funk Larry
Thompson Raymon F.
Semitool Inc.
Walton George L.
LandOfFree
Slow acting fluid valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Slow acting fluid valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slow acting fluid valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1952608