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:
Apr. 18, 2006
Filed:
Aug. 03, 2004
Applicant:
Raffaele Correale, Turin, IT;
Inventor:
Raffaele Correale, Turin, IT;
Assignee:
Varian S.p.A., Turin, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 21/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to an ionisation vacuum gauge for measuring the residual pressure of a gaseous material remaining in a container (), more particularly after operation of a vacuum pump. The gauge comprises an electron-emitting cathode (), a grid () for accelerating the electrons emitted by the cathode and a plate () collecting the ions and/or the ionised positive molecules of the gas, wherein said plate is placed outside said grid. Measuring the plate current by a galvanometer allows determining the value of the residual pressure inside the container.