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. 07, 2005
Filed:
Apr. 02, 2003
Kazuhiko Takai, Isesaki, JP;
Kazuhiko Takai, Isesaki, JP;
Sanden Corporation, Gunma, JP;
Abstract
A variable displacement compressor and a displacement control valve for use in such compressors, varies the displacement of the compressor by closing or opening a control path between a discharge chamber or a suction chamber and a crank chamber. The valve includes a valve body for closing or opening the control path; a control rod; and a rod passage receiving the control rod. A first end of the control rod is affixed to the valve body, and the control rod extends from the valve body to a solenoid for urging the valve body to close or open the control path. The control rod is tapered, such that a first cross-sectional area of the control rod proximate to the valve body is greater than a second cross-sectional area of the control rod proximate to the solenoid to close or open the control path. A method for manufacturing such compressors includes the steps of providing a displacement control valve, wherein the valve comprises a valve body, a control rod, a rod passage receiving the control rod, wherein a first end of the control rod is affixed to the valve body and the control rod extends from the valve body to the solenoid for urging the valve body to close or open the control path; and tapering the control rod. The rod is tapered, such that a first cross-sectional area of the control rod proximate to the valve body is greater than a second cross-sectional area of the control rod proximate to the solenoid for urging the valve body to close or open the control path.