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:
Apr. 19, 1994
Filed:
May. 14, 1993
Yuichi Takabayashi, Hiratsuka, JP;
Kabushiki Kaisha Komatsu Seisakusho, Tokyo, JP;
Abstract
A plasma torch is provided with a sharply converging nozzle which can prevent the lower end of the torch from making contact with a workpiece which has concavities and convexities during the cutting of the workpiece with the plasma torch. An upper portion (1a) of the nozzle (1) is provided with an outwardly directed flange (1h) so as to make close contact with a seat surface (2d) formed in the inner periphery of the lower portion of the cap (2), so as to ensure electrical conduction between the nozzle (1) and the cap (2) and to secure to a torch body (8) the nozzle (1) and components (3, 4, 5) contained in the nozzle (1). O-rings (6, 6a, 9) provide seals for the cooling water passage (7). The lower end of cylindrical portion (1a) of the nozzle (1) below the flange (1f), as well as the conical portion (1b), constitutes part of the exterior surface of the plasma torch, while the apex angle (.theta..sub.1) of the nozzle structure is made smaller so that the nozzle structure is more sharply tapered.