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:
Sep. 17, 1991
Filed:
Mar. 22, 1990
Nobuyuki Nakajima, Konan, JP;
Diesel Kiki Co., Ltd., Tokyo, JP;
Abstract
A variable capacity vane compressor in which one end face of a side block facing the rotor is formed therein with an annular recess in a bottom of which is formed a second recess. A control element rotatably received in the annular recess for varying the timing of commencement of the compressor. The control element cooperates with the second recess to define therebetween a pressure working space. The control element has a pressure-receiving protuberance slidably fitted in the pressure working space to divide same into a first pressure chamber and a second pressure chamber. A communication passage extends between the first pressure chamber and a low pressure zone. A control valve device is arranged in the communication passage for opening and closing the communication passage in response to suction pressure. A sealing device is provided in the bottom of the annular recess and engages portions of the control element other than the pressure-receiving protuberance. A high pressure-introducing passage introduces high pressure into the first pressure chamber. A restriction passage introduces high pressure into the second pressure chamber. The high pressure-introducing passage has a cross-sectional area larger than the cross-sectional area of the restriction passage. The inner wall of the pressure working space and the pressure-receiving portion defines therebetween a clearance smaller than the cross-sectional area of the restriction passage.