Pressure generating device with pressure relief means

Details Pressure generating device with pressure relief means Pressure generating device with pressure relief means

1987-02-13

1988-03-08

Look, Edward K.

Power plants

Pressure fluid source and motor

With control means for structure storing work driving energy

60418, F16D 3102

Patent

active

047292210

ABSTRACT:
A pressure generator having a high-pressure accumulator connected to a high-pressure pump by a high-pressure conduit via a first check valve, to store a high-pressure fluid from the high-pressure pump, a charging accumulator connected to the high-pressure pump, for storing a low-pressure fluid and supplying the high-pressure pump with the low-pressure fluid, and a charging pump for supplying the charging accumulator with the low-pressure fluid. The charging accumulator includes leak means for permitting the low-pressure fluid to leak at a low rate. The high-pressure conduit is connected to a storage chamber of the charging accumulator by a communication passage in which is disposed a second check valve for preventing a flow of the fluid from the high-pressure conduit toward the charging accumulator. A valve actuator is provided on one of a piston of the charging accumulator and a valve member of the second check valve, in order to open the second check valve after the fluid in the charging accumulator has leaked out. A valve control device may be provided as to hold the second check valve open for a suitable time immediately after the high-pressure pump is started.

REFERENCES:
patent: 868718 (1907-10-01), Smith
patent: 2764999 (1956-10-01), Stanbury
patent: 3587233 (1971-06-01), Fischbach

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