Brake booster with high kick-off emergency valve

Details Brake booster with high kick-off emergency valve Brake booster with high kick-off emergency valve

2005-07-05

2005-07-05

Lopez, F. Daniel (Department: 3745)

Power plants

Pressure fluid source and motor

Pulsator

Reexamination Certificate

active

06912850

ABSTRACT:
A braking device for a motor vehicle, including a master cylinder (2) with a primary piston (3) subjected to an actuating force of an input force exerted by a manual operating member (4) and a boost force exerted by a booster (6) coupled to the manual operating member (4) and an emergency assist valve (VA). Valve (VA) comprises: a reaction piston (19) sliding in a bore (20) of the primary piston (3) and urged toward a position of rest by by an elastic return member (22); a rapid piston (32) having a cross section smaller than the reaction piston (19) and sliding in a sealed manner in a bore (31) of a bushing (30) in bore (200; and a ratio control (27) actuated by a plunger distributor (10) driven by the manual operating member (4). The elastic return member (22) is arranged outside of the primary piston (3) and a transmission element (T) is provided to transmit a return force of the elastic return member (22) to the reaction piston (19).

REFERENCES:
patent: 5921084 (1999-07-01), Gautier et al.

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