Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1985-12-06
1987-10-06
Garrett, Robert E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91422, 605471, 60554, 13762569, F15B 910, F15B 1108, B60T 1300, B60T 1320
Patent
active
046974970
ABSTRACT:
A hydraulic amplifier valve assembly having an input end (where, for example, a brake pedal force may be applied) and an ouput end includes a valve housing and an amplifier piston which is slidably received in the housing only along that end portion which is oriented towards the input end. The other terminal length portion of the amplifier piston which is oriented towards the ouput end continuously projects from the valve housing and carries a pressure conduit nipple and a return conduit nipple. The valve housing is a sheet metal construction formed of a plurality of interconnected elements. This housing includes an outer, rotationally symmetrical, generally cup-shaped sheet metal housing shell and a sheet metal inner cylinder sleeve which extends inside the housing shell coaxially therewith and at a radial distance therefrom, approximately over the entire length of the housing shell. The input-side end of the cylinder sleeve is connected to the housing shell in such a manner that an annular space, which is hermetically sealed towards the input end, is defined between the housing shell and the cylinder sleeve. The amplifier piston has a tubular portion which is open towards the input end and which is slidably received in the annular space.
REFERENCES:
patent: Re30663 (1981-06-01), Schnitzius
patent: 3075499 (1963-01-01), Prather
patent: 3793829 (1974-02-01), Swanson
patent: 3886746 (1975-06-01), Farr
patent: 3977193 (1976-08-01), Hayashida et al.
patent: 4227371 (1980-10-01), Takeuchi
patent: 4379423 (1983-04-01), Leineweber at al.
patent: 4516470 (1985-05-01), Warnecke et al.
patent: 4548037 (1985-10-01), Farr
patent: 4638719 (1987-01-01), Leineweber et al.
Leineweber Gunter
Warnecke Rolf
Garrett Robert E.
Kapsalas George
Volkswagen Aktiengesellschaft
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