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. 31, 1984
Filed:
Nov. 09, 1981
Applicant:
Inventor:
Bernhard Weingartner, Feldkirch, AT;
Assignee:
Hilti Aktiengesellschaft, Schaan, LI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ; B25D / ;
U.S. Cl.
CPC ...
173105 ; 173117 ; 310 50 ;
Abstract
A percussion drill machine includes a drill shaft with a chuck for a drilling tool and a percussion device for imparting percussive force to the drilling tool held in the chuck. Each of the driving shaft and the percussive device has a separate electrical motor. The electrical motors can have a common stator or each motor may have its own stator. Each electrical motor has its own rotor and shaft. The shafts can be arranged coaxially with one being a hollow shaft laterally encircling the other. In another arrangement the shafts can be disposed in laterally spaced parallel relation.