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:
Feb. 24, 2004
Filed:
Oct. 21, 2002
Applicant:
Inventor:
Roger Artindale Heron, Stagsden, GB;
Assignee:
Oxford Magnet Technology Ltd., Witney Oxon, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B 9/00 ; F01B 2/910 ; F16K 3/900 ; F16K 5/00 ;
U.S. Cl.
CPC ...
F25B 9/00 ; F01B 2/910 ; F16K 3/900 ; F16K 5/00 ;
Abstract
A multiple port rotary valve for flow switching comprises a rotor ( ), a stator ( ), a compressor supply ( ) and a compressor return ( ). Gas is supplied via the compressor supply throughout a switching cycle such that the rotor is lifted away from the stator ( ). The valve further comprises a balance ram to counteract the effect of the differential pressure produced by the compressor supply, such that a gas seal is formed at the rotor/stator interface.