Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1981-06-05
1983-05-10
Rosenthal, Arnold
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
251 33, F16K 31383
Patent
active
043825770
ABSTRACT:
A valve housing with a horizontal partition between an inlet port and an outlet port coacts with a hollow plunger which is vertically displaceable above that partition and has a lower end fitting into an aperture thereof traversed in an upward direction by an incoming fluid. The plunger is guided in a surrounding sleeve threadedly connected at its bottom with the valve housing and at its top with a cap having a boss traversed by a stem which is integral with a control handle threaded onto that boss. The lower end of the stem adjoins an elastic membrane which is clamped between the cap and the sleeve and which bounds a fluid space above an end wall of the sleeve; this space permanently communicates via channels in the sleeve and external flutes in the plunger with the outlet port of the housing and is further connected through a tubular neck of that end wall with the interior of the plunger and thus with the inlet port when the membrane is lifted off this neck. In such a case the pressure of the incoming fluid, acting upon an internal shoulder of the plunger, raises the latter off the partition to establish a direct flow path between the two ports. When the stem is lowered to let the membrane obstruct the neck of the sleeve wall, the plunger returns by hydraulic pressure to its flow-blocking position.
REFERENCES:
patent: 457005 (1891-08-01), McNeil
patent: 1146012 (1915-07-01), Mason
patent: 1571396 (1926-02-01), Darrow
patent: 2328323 (1943-08-01), Bowers et al.
patent: 2655172 (1953-10-01), Owens
patent: 3206158 (1965-09-01), Bloomquist
patent: 4108419 (1978-08-01), Sturman et al.
Bregovic Josip
Valic Josip
Rosenthal Arnold
Ross Karl F.
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