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:
Jul. 03, 2012
Filed:
Jun. 04, 2007
Iwao Uchikado, Isesaki, JP;
Iwao Uchikado, Isesaki, JP;
Sanden Corporation, Isesaki, JP;
Abstract
A reciprocating fluid machine () includes pistons () reciprocated in respective cylinder bores (). Each piston includes, as a lateral surface () thereof, a cylindrical section () disposed in sliding contact with the corresponding cylinder bore with a coating layer () therebetween, ring groove sections () fitted with respective piston rings (), and tapered sections () each formed between the cylindrical section and the corresponding ring groove section and inclined from the cylindrical section toward the ring groove section so as to be gradually set apart from the cylinder bore. The coating layer is also formed on each tapered section in such a manner as to be gradually set apart from the cylinder bore.