Rotary expansible chamber devices – With changeable working chamber magnitude – Intermeshing rotary members
Patent
1983-01-21
1985-01-08
Vrablik, John J.
Rotary expansible chamber devices
With changeable working chamber magnitude
Intermeshing rotary members
418 26, 418 27, 418171, F04C 210, F04C 1504
Patent
active
044925395
ABSTRACT:
A gerotor pump or rotary fluid power transmission having a displacement control device for changing the volume of fluid delivered. The displacement control device operates by changing the eccentric position between the inner and outer rotors. The inlet and outlet ports of the pump are kept separate to maintain a unidirectional flow from the inlet to the outlet port across open mesh crossover zone. The closed mesh crossover zone is moved relative to the open mesh crossover zone and maintains separation between the inlet and outlet ports. As the eccentric position of the outer rotor relative to the inner rotor is changed, the volume of fluid transferred from the inlet port to the outlet port over the open mesh crossover zone is varied between a minimum and maximum amount. In one embodiment, the displacement control device is manually shifted. In another embodiment the deplacement control device is hydraulically shifted to control the displacement of the pump in response to the increasing or decreasing demand of the hydraulic system supplied by the pump.
REFERENCES:
patent: 2490115 (1949-12-01), Clarke
patent: 2588032 (1952-03-01), O'Brien
patent: 2685842 (1954-08-01), Hufferd
patent: 2898862 (1959-08-01), Brundage
patent: 3007418 (1961-11-01), Brundage
patent: 3022741 (1962-02-01), Brundage
patent: 3728048 (1973-04-01), Ratliff, Jr.
patent: 4097204 (1978-06-01), Palmer
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