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:
Jan. 17, 1989
Filed:
May. 18, 1987
Applicant:
Inventor:
Yorishige Maeda, Toyota, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ; F16J / ;
U.S. Cl.
CPC ...
277139 ; 267-15 ; 277141 ; 277160 ; 277215 ; 277216 ;
Abstract
A three-piece oil-ring comprises a pair of side rails and an expander disposed between the side rails. The expander extends in a circumferential direction and has waves in a radial direction. At both sides of radially inner portions of the expander side rail engaging portions protrude in an axial direction and extend in a circumferential direction. A slot in the expander is provided between the paired side rail engaging portions. The slot may have a rib at a longitudinally central portion of the slot. Due to the slot and the rib, the oil-ring can have an appropriate rigidity, thereby decreasing oil consumption.