Braking systems

Details Braking systems Braking systems

2007-03-13

2007-03-13

Williams, Thomas (Department: 3683)

Fluid-pressure and analogous brake systems

With pump

C303S114100, C188S347000, C188S359000, C060S547100

Reexamination Certificate

active

11006128

ABSTRACT:
A braking system includes a brake actuator which is moveable in a first direction to cause a brake applying member to apply a braking force to a member to be braked. A master valve includes a piston assembly which upon operation of a brake operating member, directs the hydraulic fluid under pressure to the brake actuator to apply the brake. A charging valve is operable in first and second states. The master valve piston assembly includes a pair of coupled pistons separated by a chamber. In a first state, the charging valve connects a source of pressurized hydraulic fluid to the master valve chamber to move the pistons apart, directing a volume of hydraulic fluid to the brake actuator. In a second state, the charging valve connects the chamber to a lower pressure area to allow the pair of pistons to be moved towards one another by a restoring force.

REFERENCES:
patent: 2407097 (1946-09-01), Porter
patent: 4073543 (1978-02-01), Resch
patent: 4183215 (1980-01-01), Weber
patent: 5313795 (1994-05-01), Dunn
patent: 6378958 (2002-04-01), Batchelor
patent: 6543596 (2003-04-01), Martin et al.
patent: 1058024 (2000-12-01), None
patent: 1122455 (2001-08-01), None
patent: 1095835 (1955-06-01), None
patent: 60073134 (1985-04-01), None
patent: WO81/01692 (1981-06-01), None

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