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. 09, 1994
Filed:
Feb. 18, 1993
Hiroyuki Yokoyama, Takasaki, JP;
Sanden Corporation, Isesaki, JP;
Abstract
A variable displacement, scroll-type compressor comprising a housing having fluid inlet and outlet ports. A fixed scroll member, placed within the housing, comprises a first plate from which a first spiral element extends. An orbiting scroll member comprises a second plate from which a second spiral element extends. A pair of holes are formed through said first plate. A pair of bypass passages place intermediately located sealed-off fluid pockets in communication with a suction chamber. A pair of cylinders are formed within respective bypass passages. A valve member having a first and a second axial end is slidably disposed within each of the cylinders so as to close and open the corresponding bypass passage. A spring is disposed within the cylinder so as to urge the valve member to open the bypass passage. The valve member receives pressure at its first axial end from the intermediately located sealed-off fluid pocket. A three-way electromagnetic valve selectively controls communication between the second axial end of the valve member and either the suction chamber or the discharge chamber.