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:
Dec. 10, 1991
Filed:
Feb. 28, 1991
Dale F Engelhardt, Orland Park, IL (US);
Christian A Wehlus, Burbank, IL (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A stud for securing a cylinder liner to a head has a modified thread form engaging a threaded hole in the stud with an interference fit. The thread is rolled and all threads have the same pitch diameter except the endmost thread. Three relief channels are formed in the threads and extend axially from the stud end through several threads while some full threads remain to engage the hole. The relief channels decrease hoop stress in the threaded hole and allow debris developed during installation to escape from the thread interface to prevent entrapment therein.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile