Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1980-09-26
1983-07-19
Maslousky, Paul E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91369A, 92 86, 92 98D, 92 99, 92248, F15B 910, F01B 1900, F16J 300
Patent
active
043937497
ABSTRACT:
A vacuum actuated type booster device for assisting master cylinder of automobile braking system. The device has a booster shell, a booster piston reciprocatably received by the booster shell, a diaphragm connected at the inner peripheral portion thereof to the rear side of a disc portion of the booster piston and at the outer peripheral portion thereof to the peripheral wall of the booster shell, a first and a second working chambers defined in the booster shell by the booster piston and diaphragm, a vacuum source with which the first and the second working chambers are normally communicated and an input rod slidably mounted in the booster piston. The second working chamber solely is brought into communication with the atmosphere as the input rod is moved forwardly so that the booster piston is driven forwardly by the pressure differential between the first and the second working chambers. The booster piston is constituted by a piston body with windows formed in the disc portion thereof and a porous thin-walled member covering the windows. The diaphragm contacts the porous thin-walled member to close the windows.
REFERENCES:
patent: 1885851 (1932-11-01), Mckee
patent: 3263618 (1966-08-01), Carpenter
patent: 3933950 (1976-01-01), Cuttitta et al.
patent: 4292887 (1981-10-01), Ohta et al.
Maslousky Paul E.
Nissin Kogyo Kabushiki Kaisha
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