Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1989-12-29
1991-01-29
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303 10, B60T 832, F04B 2102
Patent
active
049881477
ABSTRACT:
The pump having a housing with a bore for receiving a pump cylinder having a pump piston, which is drivable by a cam. An outlet valve housing is disposed, coaxially with the cylinder, in an enlarged portion of the bore. An annular chamber formed thereby encompasses the outlet valve and is closed off by a cap. The pump piston cylinder, the outlet valve and the cap are retained by a closure screw in the pump housing, which screw is screwed into the bore portion. In combination with a pump outlet bore embodied as a throttle, the annular chamber acts as a damper chamber for the brake fluid that in this type of pump is pumped discontinuously. Because of the damper chamber and pump outlet bore, pressure vibrations of the brake fluid reduced, and an impetus toward vibration of the vehicle body during a pump operation is avoided, so that noise generation in the interior of the vehicle is largely suppressed.
REFERENCES:
patent: 3756666 (1973-09-01), Leiber
patent: 4354715 (1982-10-01), Farr et al.
patent: 4568131 (1986-02-01), Blomberg et al.
patent: 4730879 (1988-03-01), Adachi et al.
patent: 4779936 (1988-10-01), Farr
patent: 4887870 (1989-12-01), Siegel
patent: 4892363 (1990-01-01), Burgdorf
Butler Douglas C.
Greigg Edwin E.
Robert & Bosch GmbH
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