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:
Dec. 31, 2013
Filed:
Apr. 21, 2009
Applicant:
Masaki Hayashi, Okaya, JP;
Inventor:
Masaki Hayashi, Okaya, JP;
Assignee:
Teikoku Piston Ring Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J 9/06 (2006.01); F16J 9/00 (2006.01); F16J 9/12 (2006.01); B60T 11/236 (2006.01); F02F 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A combined oil ring includes an oil ring having upper and lower rails formed integrally at an outer circumferential side of the oil ring to slide on a cylinder wall; a coil expander installed at an inner circumferential side of the oil ring to force the oil ring radially outwards; and a side rail installed at an upper side of the oil ring and having no torsion along an axial direction of the oil ring.