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. 19, 2019
Filed:
Dec. 04, 2015
Komatsu Industries Corporation, Kanazawa-shi, Ishikawa, JP;
Yoshihiro Yamaguchi, Kaga, JP;
Keita Kondo, Komatsu, JP;
Shigeo Morimoto, Yokohama, JP;
Katsuo Saio, Hiratsuka, JP;
KOMATSU INDUSTRIES CORPORATION, Ishikawa, JP;
Abstract
A center pipe is used in a plasma torch for plasma cutting including a base portion and an electrode. The center pipe is inserted into the electrode and supplies cooling water into the electrode. The center pipe includes a pipe body and a contact piece. The pipe body is electrically connected to an electrical power source outside of the plasma torch via the base portion. The pipe body includes a cooling water channel therein. The pipe body is formed with an electrically conductive body. The contact piece is provided on the external circumferential surface of the pipe body and energizes the electrode through contact with the internal circumferential surface of the electrode. The contact piece has elasticity to produce a counterforce when pressed in the radial direction of the pipe body. The contact piece is formed with an electrically conductive body.