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:
Nov. 11, 2003
Filed:
Apr. 04, 2002
Applicant:
Inventor:
Shunji Muta, Saitama, JP;
Assignee:
Zexel Valeo Climate Control Corporation, Osato-gun, JP;
Primary Examiner:
Int. Cl.
CPC ...
F04B 1/20 ;
U.S. Cl.
CPC ...
F04B 1/20 ;
Abstract
The outer diameter &PHgr;d of a top face-side end portion of pistons is made slightly smaller than the outer diameter &PHgr;d of a hollow cylindrical portion of the pistons other than the top face-side end portion . Thus, the tilt load of a top face-side portion of the piston is divided and distributed, and at the same time, lubricating oil is held at the top face-side end portion of the piston