Variable differential pressure unloading valve apparatus

Details Variable differential pressure unloading valve apparatus Variable differential pressure unloading valve apparatus

1976-12-20

1978-09-19

Cline, William R.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

137491, 251 29, 60418, G05D 1610

Patent

active

041146379

ABSTRACT:
Variable differential pressure control apparatus is used in a hydraulic system including a pump, an accumulator for receiving hydraulic fluid under pressure from the pump and for discharging hydraulic fluid to a work device, and an unloading valve in the circuit between the pump and the accumulator for regulating pressure of the fluid to the accumulator. The control apparatus is connected with the unloading valve for opening and closing the latter and is adjustable (1) for selectively setting the maximum fluid pressure to the accumulator and (2) for selectively setting the variation between the maximum pressure to the accumulator, at which pressure the unloading valve will open, and the minimum pressure to the accumulator at which pressure the unloading valve will close for recharging the accumulator.

REFERENCES:
patent: 2241665 (1941-05-01), Herman
patent: 2758811 (1956-08-01), Peterson
patent: 3024732 (1962-03-01), Nyman
patent: 3578018 (1971-05-01), Dillon et al.
patent: 3788339 (1974-01-01), Denker

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