Motors: expansible chamber type – Three or more cylinders arranged in parallel radial or... – Motive fluid bypass to or from assembly
Patent
1981-05-07
1983-10-25
Vrablik, John J.
Motors: expansible chamber type
Three or more cylinders arranged in parallel radial or...
Motive fluid bypass to or from assembly
91491, 91495, 1376252, 251172, F01B 106, F16K 2502
Patent
active
044111908
ABSTRACT:
Improved energy translation devices, such as fluid motors or pumps of the type including an orbiter member operatively coupled between a stator and a rotor, are disclosed which include an individually pressure compensated valving arrangement, telescopically interfitted piston elements having spherical, pressure loaded sealing ends, and a unique counterbalancing mechanism. The valving arrangement has a pair of intercommunicated, freely laterally movable valve bodies adjacent each fluid displacement piston assembly and respectively on opposite sides of the orbiter; each body includes especially designed, opposed fluid chambers therein for receiving pressurized fluid and individually urging each pair of bodies toward the central orbiter to establish a sliding seal with the orbiter and a desired amount of lubricating leakage of fluid adjacent the valve bodies. The respective fluid displacement piston assemblies are advantageously carried between the orbiter and a central shaft, and are formed of relatively shiftable, biased apart tubular pieces each having spherical ends; the respective ends are in mating engagement with complementary structure on the central shaft and the orbiter itself, to achieve a pressure loaded, sliding seal for the piston assemblies. The counterbalancing mechanism includes a differentially weighted, rotatable counterbalancer coupled to the orbiter so that the respective centers of gravity thereof are maintained 180 degrees apart during operation of the device.
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