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:
Nov. 03, 1998
Filed:
Apr. 29, 1997
Applicant:
Inventor:
Vladimir Andreyevich Mikheev, Bicester, GB;
Assignee:
Oxford Instruments (UK) Limited, Oxon, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62610 ;
Abstract
A refrigerator for cooling a sample comprises a container for holding liquid helium refrigerant to cool the sample. First cooling means is provided for cooling a condensation region with liquid helium coolant whereby helium refrigerant condenses on the condensation region and collects in the container. A sorption pump pumps gaseous helium refrigerant from the container. Second cooling means is provided for cooling the sorption pump with the liquid helium coolant. The first and second cooling means are connected in series with a source of the liquid helium coolant.