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. 23, 1989
Filed:
Feb. 05, 1988
Applicant:
Inventors:
Bert E Bergstrom, Sandviken, SE;
Hans E Lindberg, Sandviken, SE;
Assignee:
Sandvik AB, Sandviken, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23G / ;
U.S. Cl.
CPC ...
10140 ; 1014 / ; 408222 ; 409 74 ;
Abstract
A combined drilling and threading tool comprises a shank having a conical front portion defined by hole-cutting edges, and spirally curved ribs disposed rearwardly of the edges. A row of thread-cutting teeth is disposed along the leading edge of each rib. Each tooth includes a thread-cutting edge facing in the direction of tool rotation, and a side surface extending away from the direction of rotation. The side surface is shaped to produce axial and radial clearance relative to the thread being cut. Each tooth terminates at a location intermediate the leading and trailing edges of its associated rib.