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:
Feb. 21, 2012
Filed:
May. 22, 2009
Yohsuke Kawasaki, Yamanashi, JP;
Yohsuke Kawasaki, Yamanashi, JP;
Canon Anelva Corporation, Kawasaki-shi, JP;
Abstract
To provide a cold cathode ionization vacuum gauge that does not have a complicated structure and can induce discharge in a short time even after the cold cathode ionization vacuum gauge is used for a long time. A cold cathode ionization vacuum gauge has a rod-like anode, a measuring element enclosure (cathode)arranged to surround the anode, and a magnetdisposed on the outer periphery of the cathode. A discharge trigger supporting electrodehaving a projectiondirected toward the center axis of the anodeis disposed in a discharge spaceof the cathode. The discharge trigger supporting electrodeis removably disposed on the cathode, and the distance between the tip of the projectionof the discharge trigger supporting electrodeand the anodeis equal to or more than 0.3 mm.