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:
Jul. 18, 1978
Filed:
May. 10, 1976
Applicant:
Inventors:
Lothar Herrmann, Metzingen, DE;
Gotthold Schur, Riederich, DE;
Assignee:
Firma Botek Praezisions-Bohrtechnik Schur & Co., Riederich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175383 ; 175384 ; 408162 ;
Abstract
A boring device adapted for deep well drilling wherein a cutting plate is fixed in operative position in a recess of a boring head by means of a clamping bolt. The cutting plate is reversible and its position in the boring head is adapted to be adjusted in a substantially radial direction. The cutting plate has a serrated surface and the bottom of the recess has a matingly serrated surface which when contacting each other enhance the clamping action of the clamping bolt.