Expansible chamber devices – Displacement control of plural cylinders arranged in...
Patent
1984-02-21
1985-10-22
Freeh, William L.
Expansible chamber devices
Displacement control of plural cylinders arranged in...
91497, 417221, F01B 300, F04B 126
Patent
active
045481245
ABSTRACT:
The invention relates to a hydraulic motor of the type comprising a plurality of cylinder-piston units arranged radially about an eccentric cam made rotatively rigid with a rotating shaft. The cam has a pair of shoes which project axially from opposite sides thereof and engage in guides formed diametrically in a pivotable support and on a rotating shaft, respectively. The shoes engage with such guides to allow for a radial displacement of the cam and provide a rotary connection of the latter to the rotating shaft. The shoes have respective cylindrical cavities formed internally in perpendicular directions to the shaft axis of rotation, cavities which accommodate small pistons whose rods are stationary relatively to the rotating shaft. The small pistons define, on the inside of the respective cavities, two chambers which may be connected to a pressurized fluid supply to control the displacement of the cam in a radial direction to the rotating shaft, thereby changing the swept volumes of the cylinder-piston units.
REFERENCES:
patent: 1274955 (1918-08-01), Sundh
patent: 2404175 (1946-07-01), Holden et al.
patent: 3828400 (1974-08-01), Mason
patent: 3908517 (1975-09-01), Wenbourne
patent: 4195553 (1980-04-01), Klie
patent: 4320692 (1982-03-01), Komiya
Freeh William L.
Josif Albert
Modiano Guido
Riva Calzoni S.p.A.
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