Power boost mechanism

Details Power boost mechanism Power boost mechanism

1975-11-07

1977-02-01

Cohen, Irwin C.

Motors: expansible chamber type

With motive fluid valve

Pulsator actuator for valve

91391R, F15B 13042, F15B 1702

Patent

active

040056406

ABSTRACT:
A hydraulic booster is disclosed which includes a piston which is actuated by fluid pressure communicated into the booster working chamber from an accumulator by a spool valve. An operator actuated input rod generates fluid pressure in a control chamber when the booster is actuated. The pressure generated in the control chamber shifts the spool valve to a position admitting fluid pressure in the working chamber. An exhaust passage including a relief valve communicates said accumulator chamber with said control chamber. The accumulator includes a piston adapted to bias the relief valve into its open position when the fluid pressure level in the accumulator chamber is below a predetermined value.

REFERENCES:
patent: 3633363 (1972-01-01), Larsen
patent: 3831491 (1974-08-01), Thomas
patent: 3838629 (1974-10-01), Meyers
patent: 3915066 (1975-10-01), Thomas et al.
patent: 3921502 (1975-11-01), Lauer et al.

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