Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1979-08-31
1981-09-08
Maslousky, Paul E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91369B, 91374, F15B 910
Patent
active
042878110
ABSTRACT:
A brake booster of the stroke enlarging type wherein a power piston operated by the pressure difference existing on opposite sides thereof is moveable relative to a control piston provided with a control valve for controlling the difference of the pressure, and the power piston and the control piston are engageable to be immovable relative to each other by means of a locking member after the pressure difference has reached a predetermined value. The power piston is so constructed as to be able to advance a larger distance than the control piston, while the pressure difference is small, to move the output member by a larger amount in comparison to a small amount of advancement of the input member of the booster. The locking member is normally retained at the retracted position by means of a spring and is advanced, against the action of the spring, when the pressure difference on opposite sides of the power piston has reached the predetermined value, to engage the power piston with the control piston so they move together and prevent the output member from remaining stationary upon advancement of the input member caused by to a retraction of the power piston relative to the control piston.
REFERENCES:
patent: 3143930 (1964-08-01), Ayers, Jr.
patent: 3183789 (1965-05-01), Stelzer
patent: 3452646 (1969-07-01), Abbott et al.
patent: 3845692 (1974-11-01), Takeuchi
Katagiri Masayoshi
Ogura Osamu
Aisin Seiki Kabushiki Kaisha
Maslousky Paul E.
Toyota Jidosha Kogyo Kabushiki Kaisha
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