Motors: expansible chamber type – Constantly applied motive fluid with controlled venting – Fluid vented through working member
Patent
1988-01-19
1989-04-25
Garrett, Robert E.
Motors: expansible chamber type
Constantly applied motive fluid with controlled venting
Fluid vented through working member
91372, 91377, 91410, 188359, F15B 910, F15B 1115
Patent
active
048236772
ABSTRACT:
A cylindrical casing accommodates an operator pistion and a power piston separated by a fixed barrier which serves to define with the former a reservoir and with the latter a power chamber. A piston rod affixed to the operator piston extends through the barrier into manual brake actuating relation with the power piston. Hydraulic fluid under pressure is introduced to the reservoir from which it flows through barrier passages, past a check valve, into the power chamber and out through venting ports formed in the piston rod. To apply vehicle brakes linked to the power piston, the operator piston is manually propelled toward the barrier, and the power piston is thus forced away from the barrier by the piston rod, resulting in rapid transfer of hydraulic fluid from the reservoir to the power chamber. The venting ports then close, such that the power chamber is pressurized to exert a brake power assisting hydrostatic force on the power piston. Also included are provisions for developing feedback forces to afford operator brake feel.
REFERENCES:
patent: 1846089 (1932-02-01), Davis
patent: 1854367 (1932-04-01), Bragg et al.
patent: 1921590 (1933-08-01), Staude
patent: 3075355 (1963-01-01), Baker
patent: 3327590 (1967-06-01), Johnson
patent: 3515031 (1970-06-01), McPherson
patent: 3961561 (1976-06-01), Knutson
patent: 4679680 (1978-07-01), Komatz
Cahill Robert A.
Garrett Robert E.
General Electric Company
Kapsalas George
Kuch Bailin L.
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