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. 16, 1985
Filed:
Mar. 27, 1984
Applicant:
Inventors:
Assignee:
Hilti Aktiengesellschaft, Schaan, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B / ; B25D / ;
U.S. Cl.
CPC ...
173 48 ; 74 2 / ; 173109 ; 173116 ; 408-9 ;
Abstract
In an electropneumatic drill or chipping hammer with an air cushion transmitting driving force of an exciter piston to a percussion piston, a clutch is provided to interengage a drive motor with the exciter piston. The clutch can be selectively engaged by an axially displacing holding sleeve which positions a tool on the front end of the drill or hammer.