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. 22, 1985
Filed:
Apr. 09, 1984
Yorishige Maeda, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A composite oil-ring comprises a pair of rail rings and an expander-spacer ring. The expander-spacer ring is laterally extending U-shaped in cross section providing rail supporting legs and an inwardly open channel between the legs of the U. The expander-spacer ring is integrally formed with a plurality of axially extending rail engaging portions circumferentially spaced at the inner periphery of each of the legs, and has a plurality of slots extending radially cut from the inner peripheries of the legs. Also, the rail engaging portions may have circumferential central portions with the same curvature as that of the rail rings and circumferential end portions with a smaller curvature than that of the rail rings. Such structure reduces the abrasion of the composite oil-ring and prevents an independent movement of the rail rings.