Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1992-07-22
1993-11-02
Look, Edward K.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
92 99, 92101, F15B 910
Patent
active
052575721
ABSTRACT:
A vacuum brake power booster is described wherein the return movement of a valve piston actuating a control valve is limited by a U-shaped element (17) slidable into a control housing (11). In order to improve the ventilation of the working chamber of the brake power booster initiated on actuation and to shorten the booster's response time, exit areas (42, 43, 44, 45) of ventilation ducts (38, 39, 40, 41) permitting an air flow into the working chamber (3) are formed radially outwardly of an area in the control housing (11) between the arms of the U-shaped element (17), the exit areas being confined by the outside walls (34, 35, 36, 37, 46, 47, 48, 49) of air evacuation ducts (28, 29, 30, 31) interconnecting the working chamber (3) and a vacuum chamber(4).
REFERENCES:
patent: 4587885 (1986-05-01), Boehm
patent: 4598625 (1986-07-01), Belart
patent: 4619185 (1986-10-01), Mori et al.
patent: 4951550 (1990-08-01), Ohki et al.
patent: 4953446 (1990-09-01), Fecher et al.
patent: 5076142 (1991-12-01), Steer et al.
patent: 5121674 (1992-06-01), Uyama
Graichen Michael
Jakobi Ralf
Alfred Teves GmbH
Lewis J. Gordon
Look Edward K.
Nguyen Hoang
Seitter Robert P.
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