Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1998-07-20
2000-06-13
Rivell, John
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
251 33, 251 36, 251 50, F16K 3700, F16K 31363, F16K 3142
Patent
active
060736518
ABSTRACT:
A valve includes a device for shutting off a valve interior. The shutoff device is positioned by a piston which is guided in a cylinder and forms a first chamber and a second chamber in the cylinder. The second chamber communicates with the valve interior through a throttle path, so that the shutoff device is movable in a damped manner in both closing and opening directions.
REFERENCES:
patent: 2038167 (1936-04-01), Farmer et al.
patent: 2329001 (1943-09-01), Robinson
patent: 2329011 (1943-09-01), Robinson
patent: 3971412 (1976-07-01), Wierzbicki
patent: 4482127 (1984-11-01), Hafele
patent: 5873561 (1999-02-01), Bourkel et al.
Conrads Hermann-Josef
Laurer Erwin
Model Jurgen
Preiss Ullrich
Greenberg Laurence A.
Lerner Herbert L.
Rivell John
Siemens Aktiengesellschaft
Stemer Werner H.
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