Rotary expansible chamber devices – Working chamber surface expressed mathematically
Patent
1984-03-15
1986-04-22
Smith, Leonard E.
Rotary expansible chamber devices
Working chamber surface expressed mathematically
418201, F01C 116, F01C 124
Patent
active
045839271
ABSTRACT:
A male and female screw rotor mechanism for use in compressors or the like, in which a female rotor (F) is formed with an addendum (Af) on the outer side of a pitch circle of each tooth thereof and a male rotor (M) is formed with a dedendum (Dm) on the inner side of a pitch circle at each root thereof complementarily to the addendum (Af) of the female rotor: the male rotor (M) including in the following side tooth profile thereof an arc (d1-e1) having the center thereof at the intersection (m) of the pitch circle (Pm) of the male rotor and a line connecting the centers (Of, Om) of the female and male rotors; the female rotor (F) including in the leading side tooth profile thereof a curve (d2-c2) generated by the point (d1) on the male rotor having an outer diameter (Tm) of the dimension of about 1.37.times.CD; and the female rotor having the addendum (Af) formed at a rate of about 1.7% to 2.3%; provided that the points (d1, d2) are located on the line connecting the centers of the male and female rotors and CD is a distance between the rotor centers.
REFERENCES:
patent: 3423017 (1969-01-01), Schibbye
patent: 3773444 (1973-11-01), Koch
patent: 3787154 (1974-01-01), Edstrom
patent: 4028026 (1977-06-01), Menssen
patent: 4088427 (1978-05-01), Emanuelsson
patent: 4140445 (1979-02-01), Schibbye
patent: 4350480 (1982-09-01), Bammert
patent: 4406602 (1983-09-01), Kasuya
patent: 4435139 (1984-03-01), Astberg
Kabushiki Kaisha Kobe Seiko Sho
Obee Jane E.
Smith Leonard E.
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