Rotary expansible chamber devices – With changeable working chamber magnitude – By cylinder or cylinder portion pivotal movement
Patent
1983-08-29
1986-01-28
Husar, Stephen F.
Rotary expansible chamber devices
With changeable working chamber magnitude
By cylinder or cylinder portion pivotal movement
418 27, F01C 2116
Patent
active
045668701
ABSTRACT:
In an adjustable vane-type pump, there is provided an idle stroke adjusting device for variation of the pre-compression. The device comprises a laterally arranged adjustable supporting element having a substantially planar supporting surface bearing against the curved supporting surface area of the cam ring. The plane of the supporting surface of the supporting element is inclined relative to the plane which is defined by the joint axis of the delivery-limiting device and the pressure-control device as well as by the rotor axis. The curved supporting surface area of the cam ring is formed by the cylindrical peripheral surface of the cam ring. By using this extremely straightforward idle stroke adjusting device, wherein the idle stroke adjustment changes in response to the output pressure and the flow rate, respectively, a more favorable noise emission over the entire operating range of the pump is accomplished.
REFERENCES:
patent: 2975717 (1961-03-01), Rynders et al.
patent: 3107628 (1963-10-01), Rynders et al.
patent: 3664776 (1972-05-01), Mills et al.
patent: 3918855 (1975-11-01), Bornholdt
Husar Stephen F.
IT&T Industries, Inc.
Raden James B.
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