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:
Aug. 31, 1993
Filed:
Mar. 16, 1992
Takayuki Matsumoto, Gunma, JP;
Yasuhiro Tsukagoshi, Ota, JP;
Sanden Corporation, Gunma, JP;
Abstract
A variable displacement mechanism for a scroll type compressor opens and closes a communication path between the suction chamber and a pair of intermediately located sealed spaces. The variable displacement mechanism includes a piston valve member slidably disposed within a cavity. The piston valve selectively opens and closes the communication path between the suction chamber and intermediately located sealed spaces. A conduit permanently links the discharge chamber to the upper end surface of the piston valve so that, even when the communication path is established, the upper end surface of the piston valve is constantly exposed to discharge pressure.