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. 15, 2008
Filed:
Feb. 11, 2005
Gerhard Roth, Rheinstetten, DE;
Gerhard Roth, Rheinstetten, DE;
Bruker BioSpin GmbH, Rheinstetten, DE;
Abstract
A cryostat () with a first helium tank () which contains helium at an operating temperature T<3K, and a second helium tank () which is connected to the first helium tank () and contains liquid helium at an operating temperature T>3K, wherein a cooling means () is provided in the first helium tank () which generates an operating temperature T<3K in the first helium tank (), wherein the cooling means () is designed as a Joule-Thomson valve with downstream heat exchanger from which pumped helium is transported to a room temperature region outside of the cryostat () is characterized in that a refrigerator () is provided whose cold end () projects into the second helium tank () and the supplied helium is returned during normal operation in a closed loop along the refrigerator () and into the second helium tank (), thereby being pre-cooled and liquefied at the cold end () of the refrigerator (). The inventive cryostat minimizes helium consumption, thereby permitting continuous measuring operation.