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:
Nov. 10, 1998
Filed:
Jan. 22, 1997
Hidetoshi Oyama, Toyonaka, JP;
Toshinori Hongu, Nishinomiya, JP;
Koji Hamamoto, Himeji, JP;
Junzo Tanimoto, Marugame, JP;
Abstract
An arc welding machine which is capable of feeding a welding wire stably at low and a high speeds. The arc welding machine includes a welding wire feed rate setting section; a welding wire feed motor; a welding wire feed motor driving section which supplies electric power required for driving said welding wire feed motor; and a welding wire feed control section which uses, as a control frequency, a frequency other than a frequency of an input power supply or a frequency twice as high or three times as high, or a wire feed control section which selects a low control frequency for feeding a welding wire at a low rate and a high frequency for feeding the welding wire at a high rate, or a welding wire feed control section which selects a high control frequency for feeding the welding wire at a low rate and a low frequency for feeding the welding wire at a high rate.