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. 15, 1997
Filed:
Aug. 08, 1995
Applicant:
Inventors:
Bruce D Caldwell, Hitchcock, TX (US);
Paul D Duncan, League City, TX (US);
John H Fricker, Seabrook, TX (US);
Rick C Hunter, Friendswood, TX (US);
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F17C / ; F25D / ;
U.S. Cl.
CPC ...
62 501 ; 62 507 ; 622593 ; 62 492 ;
Abstract
Disclosed is an apparatus for storing and delivering a liquid cryogen. The apparatus is a dewar having a rotating liquid cryogen intake, a rotating gas supply/vent, and a rotating capacitance gauge. The rotating capacitance gauge comprises two elongated plates having outer edges shaped concentrically with the inner profile of the dewar on both ends that are electrically isolated from but fastened to one another with a small gap therebetween and electrical leads to the exterior of the dewar.