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. 06, 1995
Filed:
Mar. 22, 1994
Applicant:
Inventors:
Josef Obermeier, Peiting, DE;
Michael Selb, Feldkirch, AT;
Assignee:
Hilti Aktiengesellschaft, Schaan, LI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
408226 ; 279 193 ; 279 75 ; 4082 / ;
Abstract
A tool bit, to be inserted into a tool bit chuck of a hand-held tool used for at least one of chiseling, drilling and percussion drilling, has an axially extending chucking shank (10) with a polygon-like cross-section having chamfered corners (13, 14, 15, 16). The chucking shank has two profiled faces disposed diametrically opposite one another and each has a locking groove (19) closed at its axially spaced ends. Two other diametrically opposite profiled faces form entrainment faces (12) with rotary entrainment grooves (11) each having entrainment faces (17, 18) for transmitting torque to the tool bit.