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:
Sep. 07, 2021
Filed:
Nov. 09, 2017
Hilti Aktiengesellschaft, Schaan, LI;
Konrad Artmann, Schondof, DE;
Thomas Schaefer, Obermeitingen, DE;
Markus Hartmann, Mauerstetten, DE;
Norbert Daam, Oberdiessen, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A power tool () is provided, especially a hammer drill and/or a chiseling hammer drill, including a percussive mechanism () with a percussive element () to generate a percussive pulse onto a tool (), the element being reversibly movable along a longitudinal axis (R) by a magnetic field in order to generate the percussive pulse, and including at least a first and a second coil device () to generate the magnetic field. Each coil device () has at least a first coil ring () with a first radius (R) and a second coil ring () with a second radius (R), whereby the first radius (R) of the first coil ring () is greater than the second radius (R) of the second coil ring (), so that a space (S) is formed, at least in certain areas, between the at least first and second coil rings (), whereby a fluid (L), especially an air stream, that serves to cool the coil device () can flow through the space.