Screw rotor mechanism with specific tooth profile

Details Screw rotor mechanism with specific tooth profile Screw rotor mechanism with specific tooth profile

1986-07-10

1987-06-09

Vrablik, John J.

Rotary expansible chamber devices

Working chamber surface expressed mathematically

418201, 74458, F04G 1816

Patent

active

046717501

ABSTRACT:
A screw rotor mechanism which includes a female rotor F having tooth crests each being formed by a leading side arc g2-a2 overlying a tooth tip circle Cf thereof and a following side are a2-b2 having its center at a point 07 on a pitch circle Pf thereof, and a male rotor M having tooth tips each being formed by an arc c1-d1 having its center at an interaxial line passing through axes Of,Om of the female and male rotors F,M. The male rotor M also has tooth bottoms being complementary to tooth female tooth crests or tips and forms no seal grooves thereon. The thus shaped rotors are adapted to be machined with a high efficiency by a gear hobbing machine.

REFERENCES:
patent: 3773444 (1973-11-01), Koch
patent: 4460322 (1984-07-01), Schibbye
patent: 4492546 (1985-01-01), Kasuya
patent: 4508496 (1985-04-01), Bowman
patent: 4527967 (1985-07-01), Ingalls
patent: 4576558 (1986-03-01), Tanaka
patent: 4583927 (1986-04-01), Shigekawa

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