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:
Nov. 13, 2018
Filed:
Nov. 04, 2015
C. & E. Fein Gmbh, Schwaebisch Gmuend-Bargau, DE;
Bernd Mayer, Ellwangen, DE;
Anatoli Pankraz, Schwaebisch Gmuend, DE;
Adrian Vogt, Oechsen, DE;
Norbert Woecht, Boebingen an der Rems, DE;
C. & E. Fein GmbH, Schwaebisch Gmuend-Bargau, DE;
Abstract
An impact screwdriver having a housing includes an impact mechanism including a hammer interacting with an anvil for driving a tool, wherein the hammer is arranged on a drive shaft so as to be axially movable and preloaded in the axial direction, and wherein the hammer is driven by the drive shaft via a driver and is preloaded counter to the force of a spring element in order to trip and to transmit a rotary impulse to the anvil when a particular rotation angle is exceed, wherein the hammer and the anvil are mounted in a manner electrically insulated from one another and are connected to a voltage source, and wherein a sensor is provided for monitoring a current flow between the hammer and anvil during contact thereof for determining a contact duration between the hammer and anvil.