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. 21, 1987
Filed:
Oct. 03, 1985
Applicant:
Inventor:
Yorishige Maeda, Toyota, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277139 ; 267-15 ; 277141 ; 277215 ; 277216 ;
Abstract
A three-piece oil-ring with 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. Flat portions are located at radially inner portions of the expander. At a plurality of the flat portions protrusions extend radially inward. The protrusions contact a bottom surface of an oil-ring groove of a piston and prevents overlapping of the ends of the expander. The protrusion may be provided with holes at both sides thereof and a wire may be passed through the holes to prevent overlapping of the ends of the expander.