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:
Jul. 27, 2004
Filed:
Mar. 01, 2001
Hitoshi Hongu, Hyogo, JP;
Hiroyuki Hayashikawa, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A gas laser oscillator comprising a laser gas pressure controller for controlling the pressure of laser gas in laser gas chamber to be constant, an electromagnetic valve for supplying laser gas into the laser gas chamber from a gas bottle so that the laser gas within the laser gas chamber is maintained constant, detection means for detecting that the cycle period of open/close actions of the electromagnetic valve became longer than a reference value, and an alarm display controller which issues an alarm. In a gas laser oscillator of the present invention, even such a micro vacuum leak that hardly ill-affects the laser output can be detected with ease while the gas laser oscillator is in operation. This makes it possible to apply an appropriate maintenance work beforehand on the vacuum seal. Thus, reliable gas laser oscillators can be offered in accordance with the present invention.