Rotary expansible chamber devices – Positively actuated vane
Patent
1997-06-30
1999-11-02
Vrablik, John J.
Rotary expansible chamber devices
Positively actuated vane
F04C 2344
Patent
active
059758686
ABSTRACT:
A vane pump includes a rotatable rotor in a housing. The rotor has radial slots and radially movable vanes in the slots engage a contour ring that extends around the rotor and defines the bore. End faces of the bore having sealing surfaces closing the bore. One sealing surface has intake and delivery openings which are assigned to intake and discharge regions around the bore. Each region is located between two adjacent vanes as the vanes rotate through the regions. The contour ring surrounds the vanes and is shaped for forming an enlarging intake region, a following, decreasing precompression region and a later following, decreasing discharge region. The intake and discharge regions are connected with the intake and delivery openings, respectively. The precompression region volume changes so that the kinematic precompression is in a delivery cell between two vanes at that region is greater than a desired precompression. The intake opening has a widening which extends in the direction of rotation and opens into the precompression region to diminish an otherwise steep increase in the pressure in the precompression region to bring that pressure to a desired value.
REFERENCES:
patent: 3790314 (1974-02-01), Swain et al.
patent: 4610614 (1986-09-01), Haga et al.
patent: 5466135 (1995-11-01), Draskovits et al.
Patent Abstracts of Japan, vol. 10, No. 291, Oct. 3, 1986 & JP 61 106991 (Toyoda Mach Works Ltd.) May 24, 1986.
Patent Abstracts of Japan, vol. 16, No. 206, May 15, 1992 & JP 04 031682 (Toyoda Mach Works Ltd.), Feb. 3, 1992.
Luk Fahrzeug--Hydraulik GmbH & Co. KG
Vrablik John J.
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