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:
Jun. 20, 1978
Filed:
Apr. 25, 1977
William J Hildebrandt, West Simsbury, CT (US);
The Stanley Works, New Britain, CT (US);
Abstract
A power boring bit is made by steps including the forming of an elongated shaft member so as to provide a shaft portion and a pointed tip portion at one end which has cutting surfaces which extend along a portion of the axial length thereof and a generally axially extending planar shoulder portion spaced from the point of the tip portion which has a radial distance less than the circle of rotation of maximum radius of the tip portion. A disc is provided with a coaxial aperture and a channel extending from the circumference to the aperture with a portion of the disc being bent upwardly to provide the cutting lip. The disc is seated on the shaft member so that the cutting lip terminates closely adjacent the shoulder portion and intermediate the width thereof and thus lies inwardly of the circle of rotation of maximum radius. The disc may be formed by stamping and punching and may also be formed so as to provide a spur at the periphery thereof. The disc may be ground after assembly on the shaft member to provide the cutting edge on the cutting lip portion and on the spur.