Negative pressure booster

Details Negative pressure booster Negative pressure booster

1991-03-29

1992-09-01

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91533, 92 49, 92 99, 277164, F15B 910

Patent

active

051429640

ABSTRACT:
A negative brake booster having a power piston 8 with a piston unit 8a extending in a radial direction, a cylinder unit 8b provided at a backward position in an axial direction and airtightly and slidably supported on a center plate 4. A front diaphragm 12 is provided between the outer peripheral edge of the piston unit 8a and the front shell 2. A rear power piston with a piston unit 9a extending in a radial direction and a cylinder unit 9b furnished at a backward position in an axial direction, and a rear diaphragm 12 are provided between the outer peripheral edge of the piston unit 9a and the front shell. Further, the rear power piston 9 is connected with the valve body 7 where the flange unit 8c of the front power piston 8 is squeezed between the stepped portion of the outer periphery of the valve body 7 by the rear power piston 9.

REFERENCES:
patent: 2672015 (1954-03-01), Adams
patent: 3420145 (1969-01-01), Stumpe
patent: 4345506 (1982-08-01), Ohome
patent: 4360208 (1982-11-01), Hill et al.
patent: 4587884 (1986-05-01), Tsubouche
patent: 4729289 (1988-03-01), Boehm
patent: 5040450 (1991-08-01), Jakobe

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