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:
Apr. 27, 2004
Filed:
Oct. 04, 2001
Nippon Piston Ring Co., Ltd., Saitama, JP;
Abstract
A compression piston ring capable of reducing excessive surface pressure at a gap and adjacent portion thereto during engine operation, and capable of being produced at a low cost. The compression piston ring has generally circular shape without any notched portion. The compression piston ring has a dimensional requirements in that d /a ranges from 40 to 60, and d /h ranges from 30 to 55, in which d represents an inner diameter of the piston ring, a represents a radial length between inner and outer peripheral surfaces of the piston ring, and h represents an axial length of the outer peripheral surface. The compression piston ring is particularly available as a first compression piston ring for a supercharging type diesel engine providing high engine pressure.