Expansible chamber devices – Plural flexible wall working members
Patent
1991-06-17
1992-10-13
Look, Edward K.
Expansible chamber devices
Plural flexible wall working members
92 99, 913692, 91376R, F01B 1902, F15B 910
Patent
active
051541068
ABSTRACT:
A pneumatic brake booster of the tandem type for the brake boosting of motor vehicles, comprises a movable hub (15) driving a push rod (11) by of a reaction disk (17), a closed containment composed of a front shell (1) on the same side as the master cylinder and of a rear shell (3) on the same side as the actuating pedal, which define a front chamber and a rear chamber separated by a separating element (5) having an annular partition (9), and a front piston (25) and a rear piston (35) respectively arranged coaxially in the front and rear chambers. These chambers are themselves respectively divided by a sealing diaphragm (27, 37) fixed to each of the pistons (25, 35), in order to define, within each of these, a sub-chamber of constant pressure (21, 31) and a sub-chamber of variable pressure (23, 33), the pistons (25, 35) being movable in the axial direction under the effect of the differences in the pressures prevailing between the sub-chambers of each chamber. The annual partition (9) of the separating element (5) is simply put in place and bears on the bottom of the rear shell (3) of the containment, and the pistons (25, 35) are fixed to one another and to the movable hub (15).
REFERENCES:
patent: 2989035 (1961-06-01), Stelzer
patent: 3897718 (1975-08-01), Gardner et al.
patent: 4173172 (1979-11-01), Ohmi
patent: 4345506 (1982-08-01), Ohomi
patent: 4495854 (1985-01-01), Hibino
patent: 4516474 (1985-05-01), Ochiai
patent: 4882980 (1989-11-01), Arino et al.
patent: 5046398 (1991-09-01), Hamamiya et al.
Castel Philippe
Pressaco Pierre
Bendix Europe Services Techniques
Decker Ken C.
Look Edward K.
Nguyen Hoang
Palguta Larry J.
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