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:
Feb. 25, 2014
Filed:
Nov. 07, 2005
Klaus Fischer, Nagold, DE;
Erich Werner, Wannweil, DE;
Klaus Fischer, Nagold, DE;
Erich Werner, Wannweil, DE;
Erbe Elektromedizin GmbH, Tübingen, DE;
Abstract
The invention relates to an HF surgical instrument for treating, in particular for cutting and coagulating, biological tissue by means of an HF current. The HF surgical instrument comprises an HF generator for supplying an HF current to a cutting electrode and at least one control device for interrupting an HF current circuit. The control device comprises a current monitoring device, which detects the amplitude of the HF current and then generates a first switch-off signal when the HF current decreases over a defined period of time and/or the HF current falls below a threshold value characterizing a state of the treated tissue, as well as an arc monitoring device, which generates a second switch-off signal when an arc is formed between the cutting electrode and the tissue. The control device is configured in such a way that the HF current circuit is interrupted in response to the first switch-off signal or the second switch-off signal.