Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1995-11-17
1998-08-04
Lee, Kevin
Fluid handling
Line condition change responsive valves
Direct response valves
251 50, F16K 1702
Patent
active
057879265
ABSTRACT:
An overload preventive device is capable of preventing elevation of preload pressure due to sticking action or break-through load of a hydraulic cylinder of a press machine. A delay valve for opening when the internal pressure of the load detecting circuit is lower than the minimum pressure to be maintained continuously over a specified time is interposed between a hydraulic pump for supplying pressurized oil of a specified pressure to a load detecting circuit.
REFERENCES:
patent: 2693931 (1954-11-01), Leisy et al.
patent: 3578019 (1971-05-01), Turolla
patent: 4530371 (1985-07-01), Arav
Mukumoto Eiichi
Nagata Yuuki
Komatsu Industries Corp.
Konan Electric Company Limited
Lee Kevin
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