Rotary expansible chamber devices – Interengaging rotating members – Like rotary members
Patent
1993-05-28
1994-08-09
Bertsch, Richard A.
Rotary expansible chamber devices
Interengaging rotating members
Like rotary members
418150, F01C 118
Patent
active
053360699
ABSTRACT:
In a fluid pump, a pair of rotors having different rotation phases and designed to come into slidable contact with each other are rotatably contained in a rotor housing so as to be brought into slidable contact with a housing inner wall, and a large arcuated surface having the same radius of curvature as that of a housing inner circumferential surface and a small arcuated surface having a radius of curvature obtained by subtracting a radius of the large arcuated surface from a distance between axes of the rotors are formed on an outer circumferential surface of each of the rotors. A transitional surface crossing a virtual boundary line extending from a rotor center at an angle of 45.degree. with respect to central axes of the large and small arcuated surfaces, which transitional surface is an outer surface, of the outer circumferential surface of each of the rotors, located between the large and small arcuated surfaces, is formed by an outer transitional surface constituted by a plurality of continuous convex surfaces extending from an intersection between the virtual boundary line and the transitional surface to an edge of the large arcuated surface and an inner transitional surface constituted by a plurality of continuous concave surfaces extending from the intersection to an edge of the small arcuated surface.
REFERENCES:
patent: 3817667 (1974-06-01), Winkelstrater et al.
patent: 4648817 (1987-03-01), Mariani
patent: 5039289 (1991-08-01), Eiermann et al.
Bertsch Richard A.
Freay Charles G.
Ogura Clutch Co. Ltd.
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