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, 2007
Filed:
May. 06, 2004
Peter Hugh Birch, Horsham, GB;
David Alan Turrell, Burgess Hill, GB;
Malcolm William Gray, Crawley, GB;
Neil Turner, Godalming, GB;
Peter Hugh Birch, Horsham, GB;
David Alan Turrell, Burgess Hill, GB;
Malcolm William Gray, Crawley, GB;
Neil Turner, Godalming, GB;
The BOC Group plc, Windlesham, Surry, GB;
Abstract
A seal assembly for the protection of a static seal device for use in a vacuum pump. The seal assembly comprising at least two components which are sealingly connected together, an o-ring seal, which is engaged between the two components to prevent transfer of fluid to and from the pump between these two components and a fluid channel. The fluid channel being in the plane of the o-ring and located between the o-ring seal and a process gas flow path. The fluid channel provides a path for a barrier gas to be routed when the apparatus is in use. The channel being connectable to an external source of barrier fluid and having an outlet in fluid communication with the pump swept volume.