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. 20, 2009
Filed:
Mar. 14, 2003
Naoaki Fukuda, Osaka, JP;
Akikazu Kitagawa, Osaka, JP;
Takashi Kawahara, Osaka, JP;
Hitachi Zosen Corporation, Osaka, JP;
Abstract
In a laser machining system, gas is injected while air is inducted from the rear of a plurality of injection nozzles () disposed in the space between the machining head () and the workpiece (M) and disposed at stipulated intervals in the direction in which the laser light passes, so as not to disturb the machining gas, thus preventing the adhesion of dust arising during laser machining to optical components () within the head (). A light receptor () that receives light reflected or dispersed due to adhered contamination is disposed upstream of the optical components () within the head (), and a determination part () compares the light reception value against a preset threshold value.