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:
Mar. 21, 1978
Filed:
May. 10, 1976
Harold E McCormick, Ballwin, MO (US);
Ramsey Corporation, St. Louis, MO (US);
Abstract
A one-piece annular oil control piston ring for internal combustion engines is adapted to be received with a peripheral groove in a piston. The ring is of generally U-shaped cross section defined by a pair of opposed sidewalls which project inwardly of the ring from a central peripheral wall thereof. A pair of scraper rims projects outwardly of the ring from the outer face of the peripheral wall. Spring members are cut from the peripheral wall and project between the sidewalls inwardly of the ring a distance sufficiently inwardly of the sidewall edges to enable the spring members to engage the back wall of the piston groove in which the ring is disposed. The spring action of the spring members biases the piston ring outwardly of the groove so that the scraping rims are maintained in scraping engagement with the cylinder walls.