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. 06, 1988
Filed:
Feb. 25, 1987
James A Kammeraad, Holland, MI (US);
K-Line Industries, Inc., Holland, MI (US);
Abstract
A slitted tubular valve guide is provided with a substantially spiral groove along its entire length. At each point of intersection between the spiral groove and the slit, the ends of the groove segments immediately adjacent the slit are offset by an amount sufficient to create a discontinuity in the groove. The spiral groove is, therefore, divided into a number of inclined, decoupled groove segments incapable of flowing lubricating oil along their linear extent to the combustion chamber. The tubular valve guide is rolled from flat stock having inclined parallel groove segments preformed in the surface.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile