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:
May. 08, 2012
Filed:
Oct. 10, 2008
Koichi Kido, Tokyo, JP;
Tetsuro Sugiura, Tokyo, JP;
Hiroki Furuta, Tokyo, JP;
Ebara Corporation, Tokyo, JP;
Abstract
To provide an operation control device for a vacuum pump and a method for stopping the operation of the vacuum pump that make it possible to effectively remove products, resulting from solidification and liquefaction of gas in a casing and possibly hindering the rotation of a pump rotor, so that the vacuum pump may be started normally. An operation control devicefor a vacuum pump having a pump rotordisposed in a casingfor free rotation includes a pump rotor control sectionfor controlling the rotation of the pump rotor. The pump rotor control sectionhas a function to, after a pump stop action has been taken, rotate the pump rotorin forward and/or reverse directions according to a predetermined timing pattern and then stop the pump rotor