Pneumatic booster comprising tubular intake and equalizing...

Details Pneumatic booster comprising tubular intake and equalizing... Pneumatic booster comprising tubular intake and equalizing...

2005-05-31

2005-05-31

Lopez, F. Daniel (Department: 3745)

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

C091S37600A

Reexamination Certificate

active

06899011

ABSTRACT:
A pneumatic brake booster for a motor vehicle, of the type in which the movements of a control rod (38) are able to determine the openings and closings of at least one axial intake valve (52) which is inserted between a pressure source subjected to the pressure (Pa) higher than the first pressure (P1) and a rear chamber (18) of the booster, and of at least one axial equalizing valve (50) which is inserted between a front chamber (16) and the rear chamber (18), to actuate a moving partition (14) inserted between the front chamber (16) and the rear chamber (18), characterized in that it comprises a tubular element (76) of which axially offset transverse faces (78, 80) comprise first elements (82, 84) for sealing the axial intake and equalizing valves (50, 52) and that the control rod (38) is able to operate via two concentric springs (40, 122) having different stiffnesses.

REFERENCES:
patent: 5161451 (1992-11-01), Fecher
patent: 5579675 (1996-12-01), Gautier et al.
patent: 5609087 (1997-03-01), Horikoshi

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