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:
May. 10, 1977
Filed:
Feb. 06, 1976
Applicant:
Inventor:
David B Ballantyne, Southfield, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16B / ;
U.S. Cl.
CPC ...
85 / ; 85 41 ; 85 46 ;
Abstract
A threaded fastener, such as a bolt or a screw, is releasably secured at its shank end in driving relation with a separate hardened thread forming pilot tip whereby during assembly of the threaded fastener into an unthreaded hole in a member, the threaded fastener is power driven to drive the pilot tip which forms threads in the hole into which the threaded fastener follows, the threaded fastener being free to slide axially relative to the pilot tip whereby to attain thread alignment with the threads in the hole before engagement therewith. After the pilot tip exits from the hole, it is removed from this fastener for use with another fastener.