Pumps – Condition responsive control of drive transmission or pump... – Adjustable cam or linkage
Patent
1974-11-08
1976-07-13
Freeh, William L.
Pumps
Condition responsive control of drive transmission or pump...
Adjustable cam or linkage
F04B 4900
Patent
active
039690385
ABSTRACT:
A pressure regulator for an adjustable pump has an adjustable member for regulating the amount of fluid delivered by the pump. The position of the adjustable member is adjusted by two pistons of different diameters acting from opposite sides of the adjustable member and in which pressure of the fluid delivered by the pump is directed through a passage controlled by a control valve to one of the cylinder bores in which one of the pistons is closely guided. The control valve is movable by the fluid pressure between a neutral position in which fluid from the pump is prevented from flowing into the cylinder bore of the one piston, and two working positions, in one of which fluid from the pump will flow to the cylinder bore of the one piston while part of the fluid will flow over a throttle to a space at atmospheric pressure, and in the other of which fluid will flow unthrottled from the cylinder bore of the one piston to the aforementioned space.
REFERENCES:
patent: 2662543 (1953-10-01), Stacey
patent: 3067693 (1962-12-01), Lambeck
patent: 3669570 (1972-06-01), Himmler
patent: 3809500 (1974-05-01), Staudenrausch
Bosch Paul
Fricke Hans-Jurgen
Nonnenmacher Gerhard
Freeh William L.
LaPointe G. P.
Robert Bosch G.m.b.H.
Striker Michael J.
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