Balanced dual-lobe vane pump with radial inlet and outlet partin

Details Balanced dual-lobe vane pump with radial inlet and outlet partin Balanced dual-lobe vane pump with radial inlet and outlet partin

1990-09-28

1991-11-12

Bertsch, Richard A.

Rotary expansible chamber devices

With supply or exhaust passage in working member

Supply and exhaust passages in working member

418 15, F04C 1502

Patent

active

050643622

ABSTRACT:
A vane-type rotary hydraulic machine that comprises a housing, a rotor mounted within the housing and having a plurality of radially extending peripheral slots, and a plurality of vanes individually slidably mounted in the rotor slots. A cam ring within the housing surrounds the rotor and has a radially inwardly directed surface forming a track for sliding engagement with the vanes. Symmetrical diametrically opposed fluid pressure cavities are formed between the cam ring surface and the rotor, and fluid inlet and outlet passages in the housing are coupled to the fluid pressure cavities. Both of the fluid inlet and outlet passages comprise housing fluid passages that open to side faces of the rotor radially inwardly of the fluid pressure cavities, and fluid passages extending radially through the rotor between outer ends opening at the periphery of the rotor between adjacent slots and an inner end opening axially at the side faces of the rotor for communication with the housing fluid passage as a function of rotation of the rotor.

REFERENCES:
patent: 1792026 (1931-02-01), Nichols
patent: 1913758 (1933-09-01), Hapkins
patent: 2348428 (1944-05-01), Tucker
patent: 2736267 (1956-02-01), Mosbacher
patent: 2985110 (1961-05-01), Burt et al.
patent: 3256831 (1966-06-01), Eickmann
patent: 3639091 (1972-02-01), Lewicki

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