Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1986-03-03
1987-10-27
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303116, 188352, B60T 842, F16K 100
Patent
active
047025328
ABSTRACT:
In an hydraulic anti-skid braking system of the pump and de-boost type, the de-boost piston is held in an advanced inoperative position by a volume of fluid trapped in a space and supplied by a pump. A bleed device communicating with the space is held in an open position during initial bleeding of the system by a friction device which acts as a stop and which is releasable when the bleed device is subjected to a predetermined pressure. This enables initial bleeding to be carried out automatically and without an operator operation to open and close a bleed device. The device comprises a pressure-responsive detent which is located in a radial bore in the housing and has a releasable engagement at its inner end in a groove in a spool which comprises the bleed device.
REFERENCES:
patent: 4181370 (1980-01-01), Noeami et al.
patent: 4318460 (1982-03-01), Kosinski
patent: 4340258 (1982-07-01), Farr
patent: 4401348 (1983-08-01), Farr
patent: 4428624 (1984-01-01), Farr
patent: 4474413 (1984-10-01), Farr
patent: 4648664 (1987-03-01), Yardley
patent: 4655513 (1987-04-01), Farr
Butler Douglas C.
Lucas Industries Public Limited Company
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