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. 19, 2011
Filed:
Aug. 26, 2008
Alexander John, Rankweil, AT;
Bernhard Sander, Munich, DE;
Albert Binder, Buchs, CH;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A hand-held power tool () includes a linear motor () having a rotor () which is movable along a percussion axis (A) in an axially limited manner between two reversal points (W) and which can be driven by the striking piston () of the power tool with the intermediary of an air spring (), sensors designed for determining the actual state of the rotor () and connected to a computer () connected via power electronics () to at least one field coil () of the linear motor (), with the rotor () being displaced against a contact element () at least at one reversal point (W) and being pressed against the contact element electromagnetically; and a control process for the hand-held power tool.