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:
Jan. 31, 1995
Filed:
Aug. 19, 1993
Applicant:
Inventors:
Ralph C Longsworth, Allentown, PA (US);
Ajay N Khatri, Allentown, PA (US);
Assignee:
APD Cryogenics, Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B / ;
U.S. Cl.
CPC ...
62 511 ;
Abstract
A device for cryogenic refrigerating of an object below the triple point temperature of the cryogen. The device includes a housing in which is placed a porous plug. A liquid cryogen is supplied to one side of the plug at a pressure greater than the triple point of the cryogen. A pressure below the triple point is maintained on the other side of the porous plug. The cryogen flows through the plug and forms a solid on the supply side of the plug. The solid cryogen provides cooling by sublimation on a continuous basis to a cold station thermally coupled to the plug.