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:
Sep. 25, 1990
Filed:
Apr. 13, 1989
Applicant:
Inventors:
Hans-Ulrich Haefner, Cologne, DE;
Manfred Klotz, Kahl/Main, DE;
Wilhelm Strasser, Bergisch Gladbach, DE;
Assignee:
Leybold Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
62 555 ; 62127 ; 417901 ;
Abstract
Method and apparatus for checking the operation of a refrigerator-operator cryogenic pump. The method for checking the operation of a refrigerator-operated cryogenic pump having a cold head with at least one refrigerating unit that is equipped with a pump surface. Various data of the cryogenic pump, particularly the net refrigerating power of the refrigerating unit, are interrogated under various operating conditions and these data are compared to rated data. The method and apparatus are also directed to a diagnostic apparatus with which the interrogation is implemented.