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:
Dec. 16, 2008
Filed:
Mar. 06, 2003
Takayoshi Honma, Hamamatsu, JP;
Hiroshi Tsuchiya, Hamamatsu, JP;
Hirofumi Kan, Hamamatsu, JP;
Hamamatsu Photonics K.K., Hamamatsu-shi, Shizuoka, JP;
Abstract
Guard electrodeswhich are electrically connected with a conductive portion of a cooling water passagethrough connection linesare respectively provided in the middle of a water inlet pipeconnected with a water inlet master pipeand a water outlet pipeconnected with a water outlet master pipein M pieces of semiconductor laser units. At this time, since the guard electrodehas a potential equal to the conductive portion of the cooling water passage, the electric current hardly flows between the guard electrodeand the conductive portion of the cooling water passage. As a result, rusting is inhibited in the M pieces of semiconductor laser units, and a clogged piping is prevented in the cooling water passage