Rotary expansible chamber devices – Interengaging rotating members – Helical or herringbone
Patent
1990-07-06
1992-02-18
Bertsch, Richard A.
Rotary expansible chamber devices
Interengaging rotating members
Helical or herringbone
F04C 1816
Patent
active
050889079
ABSTRACT:
Described herein are a couple of female and male screw rotors suitable for use in an oil cooled compressor or the like, the female rotor having a tooth of a profile containing on the trailing side thereof a first tooth surface expressed by a function f(x), generated by a tip end portion located on the trailing side of the opposing male rotor tooth and expressed by an arbitrary function F(x), and a second tooth surface expressed by a function G(x) and extending from the first tooth surface of the function f(x) to the addendum circle of the female rotor tooth, the second tooth surface being profiled in a different shape from the first tooth portion f(x) and having the center of curvature in part thereof located outward of the addendum circle of the female rotor tooth on the anterior side thereof.
REFERENCES:
patent: 3423017 (1969-01-01), Schibbye
patent: 4576558 (1986-03-01), Tanaka et al.
patent: 4679996 (1987-07-01), Tanaka et al.
Bertsch Richard A.
Cavanaugh David L.
Kabushiki Kaisha Kobe Seiko Sho
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