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:
Apr. 20, 1982
Filed:
May. 21, 1980
Martin Richter, Freising, DE;
Wolfgang Regelsberger, Munich, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
In a device which can be used as a hammer drill or a chipping hammer, a percussion mechanism is located within a working cylinder in the housing of the device. A tool can be placed in one end of the working cylinder and the tool can be rotated without any percussive action or it can be given a combined rotative and percussive action. The percussive action is transmitted over a driving mechanism to an actuating piston which reciprocates a percussion piston through an intermediate air cushion. The drive mechanism includes a driving shaft with a disk pivotally connected to the shaft and in engagement with the actuating piston for selectively effecting the percussive action on the tool.