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. 03, 2015
Filed:
Nov. 30, 2005
Florian Braun, Ostfildein, DE;
Thomas Laubacher, Waiblingen, DE;
Helmut Schneider-könig, Remshalden, DE;
Frank Schnur, Bönnigheim, DE;
Florian Braun, Ostfildein, DE;
Thomas Laubacher, Waiblingen, DE;
Helmut Schneider-König, Remshalden, DE;
Frank Schnur, Bönnigheim, DE;
Norgren GmbH, Fellbach, DE;
Abstract
The invention relates to a compensation cylinder unit that acts as a drive for the electrode arms of a welding device. The unit comprises a cylinder and at least two pressure chambers, which are sub-divided by a piston assembly and which can be alternately supplied with a pressurized medium by means of a valve assembly for controlling the drive displacement. According to the invention, the valve assembly comprises a proportional valve which can be controlled by a control unit, first in accordance with harmonized path signals that represent the position of the piston assembly and then by pressure signals that respectively represent the pressure in the pressure chambers, in such a way that the difference between the pressures that prevail in the pressure chambers in a predeterminable position of the piston assembly assumes a constant value that represents the weight compensation force of at least one electrode arm.