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:
Feb. 21, 2012
Filed:
Oct. 26, 2009
Frank E. Liebmann, American Fork, UT (US);
David W. Farley, Orem, UT (US);
Richard W. Walker, Alpine, UT (US);
Michael W. Hirst, Lindon, UT (US);
Allen E. Sjogren, Park City, UT (US);
Frank E. Liebmann, American Fork, UT (US);
David W. Farley, Orem, UT (US);
Richard W. Walker, Alpine, UT (US);
Michael W. Hirst, Lindon, UT (US);
Allen E. Sjogren, Park City, UT (US);
Fluke Corporation, Everett, WA (US);
Abstract
A temperature calibration device uses Peltier cells for heating and cooling. The Peltier cells are connected to a relay that connects the cells to each other in one configuration for heating and a different configuration for cooling. The Peltier cells also receive supply voltages having different magnitudes and polarities for heating and cooling. By changing the manner in which the Peltier cells are connected to each other and using different supply voltages for heating and cooling, the cells are able to operate closer to their specified maximum temperature differential without sacrificing the useful life of the cells.