Patent · US Expired

Method and apparatus for checking the operation of a refrigerator-operated cryogenic pump

US4958499A · kind A · utility

35Cited by

3References

11Claims

0Family size

Assignee

Leybold GmBH · DE

Inventors

Hans-Ulrich Haefner · Cologne, DE
Manfred Klotz · Paderborn, DE
Wilhelm Strasser · Bensberg, DE

Key dates

Filing date	Apr 13, 1989
Grant date	Sep 25, 1990
Priority date	—
Expiry date	Apr 13, 2009

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S417/901
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.