Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1986-12-18
1988-06-14
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303110, 303114, 303119, B60T 832, B60T 842
Patent
active
047507900
ABSTRACT:
An anti-lock hydraulic brake system for vehicles incorporating a master cylinder (21) and wheel brakes, (30, 31) connected to the master cylinder (21) through connecting lines (32, 34), as well as an anti-lock apparatus having sensors for the associated wheel brakes (30, 31) by which, in the event of excessive deceleration of a vehicle wheel, the wheel brake will be disconnected from the master cylinder (21) by a valve (11) and will be connected to a relieving device. The relieving device is composed of a slave cylinder (1), whose piston (2) is in operative engagement with a movable wall of an actuating device operating with vacuum, which movable wall is displaceable to assume a control position in opposition to the force of a resilient element, for example a steel spring, the piston chamber (44) in front of the piston (2) being connected via a by-pass line (35) which contains a valve (23) with the brake line (32, 34) communicating with the intermdeiate chamber (45) of a separating valve ( 11). The valve member (12) of the separating valve (11) is actuatable by the piston (2), while the pressure in the cylinder chamber of the vacuum cylinder housing is variable through a valve so that the movable wall is movable to and fro together with the piston (2).
REFERENCES:
patent: 3477765 (1969-11-01), Perrino
patent: 3552802 (1971-01-01), Packer et al.
patent: 3756664 (1973-09-01), Schlitz et al.
patent: 3788710 (1974-01-01), Von Grunberg et al.
patent: 3790228 (1974-02-01), Adahan
patent: 3901559 (1975-08-01), Inada
patent: 4063785 (1977-12-01), Tribe
patent: 4066301 (1978-01-01), Harries
patent: 4647114 (1987-03-01), Schuett et al.
Alfred Teves GmbH
Butler Douglas C.
Raden James R.
Seitter Robert P.
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