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:
Apr. 25, 1978
Filed:
Jan. 10, 1977
Robert Lovell, Naples, FL (US);
John K Stott, Toronto, CA;
Other;
Abstract
A reconditionable drill bit assembly comprising a drill bit body having a thrust face at one end and a head section separably connected to the drill bit body, the head section including a working face and an opposite rear face engaging the thrust face of the drill bit body, a plurality of bores extending through the head section and opening on the working face, the bores including a tapered seat portion adjacent the working face and a generally cylindrical section extending from the seat portion to the rear face, a tapered carbide cutting insert seated in the seat portion and a back-up pin located in the cylindrical section engaging the inner end of the cutting insert and the thrust face to hold the cutting insert in place whereby the cutting inserts are replaceable by separating the head section the drill bit body and removing the back-up pins and the cutting inserts through the cylindrical sections of the bores.