Rotary expansible chamber devices – Working chamber surface expressed mathematically
Patent
1986-05-13
1987-12-15
Vrablik, John J.
Rotary expansible chamber devices
Working chamber surface expressed mathematically
F04C 18344
Patent
active
047129875
ABSTRACT:
The endless camming inner 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, has a cam profile including an increasing radius portion along which the amount of protrusion of each vane from the rotor gradually increases with movement of the vane, and a decreasing radius portion along which the amount of protrusion of each vane from the rotor gradually decreases with movement of the vane. The increasing radius portion and the decreasing radius portion are continuously arranged in the order mentioned and in the moving direction of the vanes. The increasing radius portion terminates in a first half of the whole circumferential length of the one cycle performing portion of the endless camming inner peripheral surface. The cam profile of the one cycle performing portion of the camming surface is calculated by the use of a single equation.
REFERENCES:
patent: 2791185 (1957-05-01), Bohnhoff et al.
patent: 4480973 (1984-11-01), Ishizuka
patent: 4501537 (1985-02-01), Ishizuka
Diesel Kiki Co. Ltd.
Vrablik John J.
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