Pneumatic brake booster for use in a brake system

Details Pneumatic brake booster for use in a brake system Pneumatic brake booster for use in a brake system

2005-07-19

2005-07-19

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

Pulsator

C091S37600A

Reexamination Certificate

active

06918249

ABSTRACT:
A brake booster comprising an envelope (2) having a longitudinal axis (X) formed of a first (4) and of a second (6) shell to define an interior volume divided by moving a skirt into a low-pressure first chamber and a variable-pressure second chamber. A three-way valve (12) actuated by a control rod places the front chamber and the rear chamber in communication at rest and during a braking phase interrupts the communication between the front chamber and the rear chamber and thereafter allows communication of pneumatic fluid at high pressure to the rear chamber. The booster is attached to the master cylinder by a clip-fastening arrangement wherein tabs (52) that radially extend from a sleeve tube (48) are plastically deformable in the radial direction on enter into a passage (54) in a flange (56) of the master cylinder and returning to the initial position when the attachment operation is complete.

REFERENCES:
patent: 4955157 (1990-09-01), Brighton et al.
patent: 5487327 (1996-01-01), Schluter et al.
patent: 6314865 (2001-11-01), Henein et al.

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