Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1977-01-19
1983-04-12
Hershkovitz, Abraham
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
60552, 91378, F15B 910
Patent
active
043794238
ABSTRACT:
A hydraulic amplifier having a housing provided with pressure and return conduits, an amplifier piston, and a control slide. The piston is slidably arranged in an axial bore of the housing and itself has a blind axial bore within which the control slide is arranged. The piston and slide together constitute a unit which is free of pressure equalization and which is provided with two sets of passages for selectively placing the face of the piston in communication with the pressure and return conduits, respectively, depending on the axial position of the slide in the blind bore of the piston. The passages are asymmetrical with respect to the peripheral surface of the slide and are so constructed and arranged that whichever set of passages is closed, the slide is pressed radially against the closed passage under the influence of certain pressure differences which prevail in the hydraulic amplifier. This makes it possible to construct the component parts of the hydraulic amplifier with relatively coarse tolerances.
REFERENCES:
patent: 2407097 (1946-09-01), Porter
patent: 2583242 (1952-01-01), Turkenkopf
patent: 2916882 (1959-12-01), Spalding
patent: 2946195 (1960-07-01), Hare
patent: 3073340 (1963-01-01), Hancock
patent: 3313383 (1967-04-01), La Tendresse
patent: 3682199 (1972-08-01), Bader
patent: 3802568 (1974-04-01), Plura
patent: 3805529 (1974-04-01), Lech
patent: 3827242 (1974-08-01), Belart
patent: 3827759 (1974-08-01), Belart
patent: 3845693 (1974-11-01), Meyers
patent: 3899890 (1975-08-01), Adams
ATZ (Automobiltechnische Zeitschrift), 75 (1973) 7, pp. 261-263.
Leineweber Gunther
Warnecke Rolf
Hershkovitz Abraham
Volkswagenwerk AG
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