Dual center-port master cylinder

Details Dual center-port master cylinder Dual center-port master cylinder

1994-11-14

1995-12-26

Lopez, F. Daniel

Power plants

Pressure fluid source and motor

Pulsator

60589, B60T 1120

Patent

active

054776813

ABSTRACT:
A dual master cylinder having a bore of uniform diameter extending through an open end thereof and slidably supporting therein a pair of tandem pistons defining a pair of pressurizing chambers. Fuel input is controlled by center-port poppet valves, and the relative disposition of inlet and outlet brake fluid passages are reversed compared to conventional master cylinders to facilitate master cylinder recession into a vacuum booster without requiring long, angled brake fluid passages and to require a shorter and lighter housing. The inlet and outlet passages are positioned so that seals do not slide over fuel passage ports during operation, eliminating seal wear caused thereby and allowing the ports to be larger, thus reducing back pressure and improving compensation when the pistons are returning to, or are in, an unstroked position.

REFERENCES:
patent: 3216194 (1965-11-01), Yardley
patent: 4417445 (1983-11-01), Furuta
patent: 4688382 (1987-08-01), Farr
patent: 5042254 (1991-08-01), Schonlau et al.
patent: 5046316 (1991-09-01), Steffes et al.

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