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:
Sep. 11, 1984
Filed:
Jun. 09, 1983
Merle R Showalter, Madison, WI (US);
Automotive Engine Associates, Madison, WI (US);
Abstract
A piston ring and cylinder assembly designed for fully hydrodynamic operation with oil control is disclosed. The rings are loaded in circumferential compression and are flexible. They conform instantaneously to cylinder wall distortions and oil film forces. The elastic properties of the ring, combined with the ring crown geometry maintain oil control (zero oil pumping to the top of the cylinder wall) with fully hydrodynamic conditions between ring and cylinder wall. The cylinder wall is finished to a very smooth surface and may be provided with a number of axial grooves near the top dead center position of the top ring so that oil is positively blown down from the top of the cylinder for oil control.