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:
Jun. 04, 1991
Filed:
Aug. 21, 1989
Toshinori Aihara, Kanagawa, JP;
Atsugi Motor Parts Company, Limited, Kanagawa, JP;
Abstract
In a variable-delivery vane-type rotary compressor, a rotational displacement of an adjust member relative to a front member fixedly closing a front end of a cam ring varies a compression starting point of a rotary vane in a working chamber formed in the cam ring. The rotational displacement of the adjust member is controlled by an adjust member actuating unit in response to a pilot pressure applied to the adjust member actuating unit from a pilot pressure applying unit. The pilot pressure applying unit includes a first passage communicating the adjust member actuating unit with a valve unit, a second passage communicating an induction chamber with the valve unit, and a third passage communicating a discharge chamber with the valve unit. The valve unit, when it is most displaced in a first direction, fully blocks the communication between the adjust member actuating unit and the induction chamber through the first and second passages while allowing the communication between the adjust member actuating unit and the discharge chamber through the first and third passages for applying a pressure within the discharge chamber to the adjust member actuating unit as the pilot pressure. On the other hand, the valve unit, when it is most displaced in a second direction opposite to the first direction, fully opens the communication between the adjust member actuating unit and the induction chamber through the first and second passages for applying a pressure within the induction chamber to the adjust member actuating unit as the pilot pressure.