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:
Oct. 12, 1993
Filed:
Jun. 12, 1992
Jeffrey R Angel, Oxford, MI (US);
LeRoy R Boza, Metamora, MI (US);
Progressive Tool & Industries Co., Southfield, MI (US);
Abstract
A resistance welding gun which is adapted to prevent asymmetrical impacting of two or more metal sheets to be welded. The resistance welding gun includes a pair of rotatably connected arms, each of which has a corresponding working end and actuation end. An electrode tip is located at each working end to provide a pair of opposed welding electrodes, while a cylinder is attached to the actuation ends of the arms to provide rotation therebetween. Between the actuation ends there is provided an equalizing mechanism including a crank and a pair of linkages which serve to equalize the movement of the arms about their pivot. In cooperation with the pivot of the arms, the crank establishes a fixed or datum point at which the electrode tips of the resistance welding gun are targeted such that, when properly positioned on opposite sides of the metal sheets, the electrode tips contact the metal sheets substantially simultaneously and apply substantially equal forces to the opposite sides of the metal sheets. As a result, the equalizing mechanism substantially prevents unilateral contacting and asymmetrical impacting by the electrode tips on the metal sheets.