Fluid handling – Line condition change responsive valves – Safety cut-off requiring reset
Patent
1992-05-08
1993-09-07
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
Safety cut-off requiring reset
137462, 137498, 137517, F16K 1728
Patent
active
052419843
ABSTRACT:
An elastically movable valve having a through hole is installed at a required position in the path of a fluid. At the time of normal operation, the fluid is allowed to pass through the through hole, but if the fluid pressure is increased to a certain level over that of normal operation, the valve is elastically deformed by this high fluid pressure allowing it to come into contact with its valve seat and stopping the fluid flow.
Since it has no sliding part for the motion of a movable valve. The dust are not generated and, the fluid used in a fluid circuit requiring a high degree of cleanness is always guaranteed to have a high degree of cleanness. As there is no space for the fluid to stagnate, the new fluid is not partially contaminated with the previous fluid after exchanging fluid.
In addition to the first described structure, a bypass flow path is mounted connecting the space between the elastically movable valve (first valve) and its valve seat to the flow path on the downflow side of the valve seat, and a second movable valve is arranged allowing opening or closing of the bypass flow path.
By mounting the second movable valve in the bypass flow path, the response of transition from fluid flow stopping to fluid flow resumption becomes fast.
REFERENCES:
patent: 2687745 (1954-08-01), Hackett
patent: 3106937 (1963-10-01), Sands
patent: 3683957 (1972-08-01), Sands
patent: 4022244 (1977-05-01), Oman
patent: 4141379 (1979-02-01), Manske
Nakamura Mituo
Onjohji Takashi
Donaldson Richard L.
Hepperle Stephen M.
Hiller William E.
Texas Instruments Incorporated
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