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. 06, 2026
Filed:
May. 03, 2022
Nhk Spring Co., Ltd., Yokohama, JP;
Asato Yamamoto, Yokohama, JP;
Tadashi Tokiwa, Yokohama, JP;
NHK SPRING CO., LTD., Kanagawa, JP;
Abstract
A laser welding apparatus includes a laser medium, an excitation light source and a control unit. The control unit supplies drive power to the excitation light source to inject excitation energy to the laser medium. The control unit supplies preliminary excitation power, which is smaller than pulsed drive power, to the excitation light source over a preliminary supply time, which is longer than a pulse width of the drive power before welding the first weld to be welded. After the preliminary supply time elapses and then an interval, the pulsed drive power is supplied to the excitation light source to weld the first weld.