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:
Sep. 05, 2006
Filed:
May. 15, 2003
Derek Graeme Madgewick Savidge, West Sussex, GB;
Neil Turner, Surrey, GB;
Graeme Huntley, West Sussex, GB;
Derek Graeme Madgewick Savidge, West Sussex, GB;
Neil Turner, Surrey, GB;
Graeme Huntley, West Sussex, GB;
The BOC Group Plc, Windlesham, GB;
Abstract
A vacuum pump system () for pumping gas from an enclosure () comprises: a vacuum pump unit () having a pump inlet () connectable with an outlet () of such an enclosure and a pump outlet () for exhausting gas; and a chamber () selectively connectable with the pump inlet and the pump outlet, such that, in use, in a first state gas can be pumped from the chamber to the pump inlet by the vacuum pump unit and in a second state gas can be evacuated from the pump outlet to the chamber to reduce pressure at the pump outlet. A method of controlling the vacuum pump system () comprises a first step of pumping gas from the chamber to the pump inlet using the vacuum pump unit and a second step of allowing gas to be evacuated from the pump outlet to the chamber to reduce pressure at the pump outlet.