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:
Oct. 15, 1991
Filed:
Jul. 27, 1990
Applicant:
Inventor:
David C Hageman, Chagrin Falls, OH (US);
Assignee:
Premier Industrial Corporation, Cleveland, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
408230 ; 408199 ;
Abstract
Disclosed is a spotweld removal tool adapted for removing spotwelds which join two or more layers of sheet metal to thereby free the sheet metal layers from one another. The spotweld removal tool comprises a split point twist drill having a central cutting tip (38) having leading edges (44 and 46) and defined by flared walls (56 and 58), recessed surfaces (64 and 66) adjoining the flared walls and peripheral cutting flats (40 and 42).