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. 16, 2019
Filed:
Apr. 07, 2014
Ateliers Busch SA, Chevenez, CH;
Ateliers Busch SA, Chevenez, CH;
Abstract
The present invention relates to a pumping method in a pumping system (SP) comprising: a primary dry screw-type vacuum pump () with a gas entry orifice () connected to a vacuum chamber () and a gas exit orifice () leading into a conduit () before coming out into the gas outlet () of the pumping system (SP), a non-return valve () positioned in the conduit () between the gas exit orifice () and the gas outlet (), and an ejector () connected in parallel to the non-return valve (). According to this method, the primary dry screw-type vacuum pump () is put into operation in order to pump the gases contained in the vacuum chamber () through the gas exit orifice (); in a simultaneous way, the ejector () is fed with working fluid, and the ejector () continues to be fed with working fluid all the time that the primary dry screw-type vacuum pump () pumps the gases contained in the vacuum chamber () and/or all the time that the primary dry screw-type vacuum pump () maintains a defined pressure in the vacuum chamber (). The present invention also relates to a pumping system (SP) able to be used for implementing this method.