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:
Jun. 26, 2001
Filed:
Jul. 30, 1999
Shigeru Umeda, Ayase, JP;
Obara Corporation, Ayase, JP;
Abstract
An X type electric welding machine with an electrode pressing force that is not susceptible to the wear of electrodes or variation of deflection of gun arms which varies every pressing force. An accurate electrode pressing force can be obtained for an electrode pressing force set by a simple controller. The X type electric welding machine includes at least two gun arms each having electrodes at tip ends thereof which oppose each other. The gun arms are connected to each other at a connection part on which at least one gun arm is rotatably pivoted. A reduction gear is disposed separately from the connection part of the gun arms and a motor is connected to the reduction gear. A power transmission mechanism is provided at an output side of the reduction gear for rotating one of the gun arms, wherein the power transmission mechanism includes a swing arm fixed to an output shaft of the reduction gear and a link formed between the swing arm and one of the gun arms. The swing arm and the link are connected to each other so that an output from a shaft of the motor and an electrode pressing force applied by one of the electrodes that is transmitted to the one of the electrodes from a tip end of the swing arm by way of the link, have a substantially linear proportional relation.