Center compensating master cylinder

Details Center compensating master cylinder Center compensating master cylinder

1990-02-02

1991-03-12

Look, Edward K.

Power plants

Pressure fluid source and motor

Pulsator

60588, 60533, B60T 1120

Patent

active

049989502

ABSTRACT:
A dual chamber master cylinder has a center compensation valve for fluid compensation of the secondary pressurizing chamber, eliminating lip seal damage to the secondary pressurizing piston seal that can occur when a bypass port is provided in the wall of the secondary pressurizing chamber. Center compensation is accomplished through a passage connecting the secondary pressurizing chamber, under control of the compensation valve, to a common compensation chamber for both the primary and the secondary pressurizing chambers. In the preferred embodiment the common compensation chamber is the quick take-up chamber of the master cylinder. This provides quick take-up pressure to both pressurizing chambers upon initial master cylinder actuation.

REFERENCES:
patent: 3068651 (1960-07-01), Shutt
patent: 3659421 (1972-05-01), Wilson et al.
patent: 4550567 (1985-11-01), Schaefer
patent: 4553395 (1985-11-01), Price et al.
patent: 4621498 (1986-11-01), Schaefer
patent: 4707989 (1987-11-01), Nakamura et al.

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