The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 1985
Filed:
Jun. 03, 1983
Katsuichi Yamamoto, Saitama, JP;
Diesel Kiki Co., Ltd., Tokyo, JP;
Abstract
A variable-displacement vane compressor has a pump housing and a cylindrical rotor supported on a drive shaft and rotatably disposed in the pump housing. The rotor has a plurality of vanes movably fitted in respective slits formed in the rotor and having radially outward ends slidable against an inner peripheral camming surface of the pump housing. Certain ones of the vanes are made of a ferromagnetic material and can be retracted back into the slits in response to energization of an electromagnetic coil to thereby reduce the volume of a fluid discharged from pump working chambers in the pump housing. When the electromagnetic coil is de-energized, all of the vanes are slidably held against the inner peripheral camming surface to discharge the compressed fluid in an increased volume.