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:
Jun. 17, 2003
Filed:
Oct. 12, 2000
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An orifice ( ) is disposed near the junction of a discharge tube ( ) and a laser gas lead-in pipe ( ). A laser gas relay pipe ( ) is disposed so as to allow the laser gas to flow parallel in the same direction as or in the reverse direction to the flowing direction of laser gas in the discharge tube ( ). The orifice ( ) includes a portion for impeding flow of laser gas, and plural holes for passing laser gas, and at least one of the holes is deviated from the center. The total area of the holes summing up the area of the plural holes provided in the orifice ( ) is at a rate of 0.5 to 0.8 to the sectional area of the discharge tube. The plural holes of the orifice ( ) are nearly circular, and the diameter of each hole is smaller than the radius of the orifice.