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:
Jul. 11, 2017
Filed:
Jan. 15, 2015
Trumpf Werkzeugmaschinen Gmbh + Co. KG, Ditzingen, DE;
Walter Thiel, Schwaikheim, DE;
Alexander Heinz, Vaihingen an der Enz, DE;
TRUMPF Werkzeugmaschinen GmbH + Co. KG, Ditzingen, DE;
Abstract
An electroadhesion gripper for retaining workpieces includes a first spiral electrode having a plurality of turns and a second spiral electrode having a plurality of turns, the two spiral electrodes being arranged so as to be at least partially bifilar. The electroadhesion gripper has a diode by which the first and second spiral electrodes are connected to each other. Portions of the first and second spiral electrodes are connected in series by the diode, and an entirety of the connected portions of the first and second spiral electrodes has a perceptible inductivity. The gripper is driven with an alternating-current (AC) voltage and an occupation state and wear degree of the gripper can be determined during the AC voltage cycle.