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:
Mar. 14, 2006
Filed:
May. 02, 2001
Ferdinand Kristen, Gilching, DE;
Hans-werner Bongers-ambrosius, Munich, DE;
Ferdinand Kristen, Gilching, DE;
Hans-Werner Bongers-Ambrosius, Munich, DE;
Hilti Aktiengesellschaft, Furstentum, LI;
Abstract
An electric hand tool apparatus () for driving a drill-like tool, which carries out an at least partial rotational movement, has within a housing (), an electric motor () without or free of collector and slip ring, the rpm of which can be controlled by motor control electronics (), wherein an rpm-dependent clutch () for transferring the torque is disposed in a force transfer path from the electric motor () to a transmission (). Optionally, to prevent an excessively high twisting of the housing (), a sensor () is evaluated and the rpm of the electric motor () is reduced in order to sever the transfer of force by the rpm-dependent clutch ().