Motors: expansible chamber type – With motive fluid valve – Both inlet and exhaust controlled by motive fluid pressure...
Patent
1979-12-20
1981-09-08
Michalsky, Gerald A.
Motors: expansible chamber type
With motive fluid valve
Both inlet and exhaust controlled by motive fluid pressure...
60553, 60554, 91461, 1376256, F15B 13042, F15B 1314
Patent
active
042878136
ABSTRACT:
Booster providing both hydraulic feed-back and hydraulic feel-back in a two-stage operation in which we boost-brake a vehicle. Concentric, nesting, inner and outer control parts include, as the sliding outer part, a brake-pedal-connected input signal spool or sleeve for developing a desired signal pressure varying linearly along the length of, and therefore according to the sliding position of, the sleeve; the inner part constitutes a captive, telescoping metering spool with its ends in corresponding ends of the spool sleeve. At one end, the metering spool is given the desired signal as a first stage pressure to respond to; the spool's response constitutes the second stage, by metering an actual pressure and applying it at the other end of the spool sleeve and spool, whereby hydraulic feed-back comes on in the second stage at actual pressure to responsively control the other end of the metering spool, and whereby hydraulic feel-back in the second stage comes on at the same actual pressure to exert itself on the other end of the spool sleeve and therefore react against the brake pedal.
REFERENCES:
patent: 4015619 (1977-04-01), Shore et al.
Chatterjea Probir K.
Shore Daniel B.
AuBuchon F. David
Gaines John W.
International Harvester Company
Kamp Ronald C.
Michalsky Gerald A.
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