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. 13, 2007
Filed:
Aug. 15, 2005
Reinhard Riedl, Finning, DE;
Reinhard Riedl, Finning, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A power tool includes an electric motor () located in the tool housing () and capable of rotation in both clockwise and counterclockwise directions, a brush carrier () carrying at least two brushes () that electrically contacts the commutator () of the motor (), an actuation member () accessible from outside of the housing () for rotating the brush carrier () relative to the housing () in a circumferential direction (U) of the commutator () between clockwise rotational position and counterclockwise rotational position, and a device for preloading the brush carrier () in both clockwise and counterclockwise rotational positions and having at least one spring member () for biasing the brush carrier () both in the circumferential direction (U) and the axial direction of the commutator ().