Rotary displacement machines having rotors of asymmetrical...

Details Rotary displacement machines having rotors of asymmetrical... Rotary displacement machines having rotors of asymmetrical...

2005-02-16

2009-12-01

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Working chamber surface expressed mathematically

C418S190000, C418S201300

Reexamination Certificate

active

07625191

ABSTRACT:
Rotary displacement machine having a housing and at least two twinned rotors of asymmetrical profile, the twinned rotors each made of a core on which projects a helicoidal thread which extends above the core like a tooth. The helicoidal thread having a first predetermined dimension in a direction radial to the longitudinal axis of the twinned rotors and above the surface of a rotor. The machine having a first flank with a position and length of arc predetermined such that the shape of the first flank and the shape of the second flank each connect to one of the opposite ends of a connecting segment which constitutes a helicoidal surface. The connecting segment having a second predetermined dimension in a direction radial to the longitudinal axis of the twinned rotors such that the ratio of the second dimension over the first dimension ranges between 0.005 and 0.1.

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