Rotary expansible chamber devices – With mechanical sealing – By changing working member or cylinder relative position
Patent
1984-10-22
1986-03-04
Vrablik, John J.
Rotary expansible chamber devices
With mechanical sealing
By changing working member or cylinder relative position
418133, 418270, 291564R, F04C 200, F04C 1500, B23P 1500
Patent
active
045738904
ABSTRACT:
In a vane pump, the cam ring must be fixed to an annular recessed portion of the housing in such a way that there exists no eccentricity between the cam ring and the rotor. To eliminate an eccentricity, a pair of semicircular grooves are formed on the inner circumference of the annular recessed portion diametrically opposed to the center thereof; a pair of semicircular grooves are formed on the outer circumference of the cam ring also diametrically opposed to the center thereof so as to provide two locating pin holes in cooperation with the two housing grooves, respectively; a pair of locating pins are pressure fitted, respectively, to the locating pin holes. Further, it is possible forcibly correct an eccentricity by selecting a locating pin having a diameter appropriately larger than that of the pin hole. The two locating pin holes are arranged in the direction of belt tension to eliminate the eccentricity due to belt tension.
REFERENCES:
patent: 1722616 (1929-07-01), Williams
patent: 2733687 (1956-02-01), Schmid
patent: 3491699 (1970-01-01), Yowell
patent: 4201521 (1980-05-01), Carlson
patent: 4470768 (1984-09-01), Konz
Hadama Shigeyuki
Sugizaki Kyoichi
Atsugi Motor Parts Co. Ltd.
Vrablik John J.
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