Hydraulic vehicle servo brake

Details Hydraulic vehicle servo brake Hydraulic vehicle servo brake

1985-06-13

1987-02-17

Reger, Duane A.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

60574, 60591, B60T 1312, B60T 802

Patent

active

046434887

ABSTRACT:
A hydraulic vehicle servo brake comprises a master cylinder (11) accommodating at least one stepped main-piston assembly (12). A booster piston (12') is provided which is acted upon by a controlled pressure with the controlled pressure being delivered by a brake valve (29) governed by the brake pedal. When the brake pedal (13) is not depressed, a valve contained in an annular chamber is opened and connects the annular chamber to the supply reservoir. In the event of slight advance movement of the main-piston assembly (12), the valve (20) will close. In this case, a wheel-slip brake control unit will shut off the annular chamber (19) hydraulically towards the outside. To accomplish a compact design, the booster piston (12') and the tapered main piston part (12") are united to form an integral piston (26) of constant diameter.

REFERENCES:
patent: 3539227 (1970-11-01), Drutchas
patent: 3827242 (1972-11-01), Belart
patent: 4482192 (1984-11-01), Leiber

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