Rotary expansible chamber devices – Working chamber surface expressed mathematically
Patent
1982-07-07
1984-11-06
Vrablik, John J.
Rotary expansible chamber devices
Working chamber surface expressed mathematically
418259, F04C 1800
Patent
active
044809735
ABSTRACT:
The endless camming peripheral surface of the pump housing, which performs one cycle of suction, compression and discharge of fluid in cooperation with the vanes and the rotor, comprises an increasing radius portion along which the amount of protrusion of each vane gradually increases with movement of the vane, and first and second decreasing radius portions along which the amount of protrusion gradually decreases with movement of the vane, the three portions being successively arranged in the order mentioned in the advancing direction of the vanes. Each of the three portions has such a cam profile that the velocity of radial movement of each vane varies at a rate gradually decreasing as the vane approaches the terminating end of the portion. Preferably, the above one-cycle performing portion further includes one or two constant radius portions located between the above three portions, along which the amount of protrusion of each vane is kept substantially constant with movement of the vane.
REFERENCES:
patent: 2347944 (1944-05-01), Fowler
patent: 2832199 (1958-04-01), Adams et al.
patent: 3717423 (1973-02-01), Petersen et al.
patent: 3890071 (1975-06-01), O'Brien
Diesel Kiki Co. Ltd.
Olds T.
Vrablik John J.
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