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:
Oct. 04, 2016
Filed:
Mar. 08, 2011
Noriaki Ayuzawa, Chiyoda-ku, JP;
Masahide Hama, Chiyoda-ku, JP;
Yutaka Kitazume, Chiyoda-ku, JP;
TPR Co., Ltd., Tokyo, JP;
Abstract
A combination oil ring prevented from freeze up of the side rails and spacer expander, that is, a combination oil ring of the present invention provided with a top and bottom pair of side railsandand a spacer expanderhaving large numbers of top piecesand bottom pieces arranged separated in the axial direction and circumferential direction and alternating in the circumferential direction, connecting piecesconnecting adjoining top piecesand bottom pieces, and ear partsandformed rising up at the inner circumference side ends of the top piecesand bottom piecesfor pushing against the side railsand, in which combination oil ring, groovesandare formed in at least one surfaces of top surfaces of the top piecesand bottom surfaces of the bottom pieces, and through holesandby which the groovesandare communicated are formed in the ear partsand