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. 31, 2023
Filed:
Oct. 15, 2020
Applicant:
Littelfuse, Inc., Chicago, IL (US);
Inventors:
Efrem Fesshaie, Norwich, GB;
Paulius Kabisius, Kaunas, LT;
Assignee:
Littelfuse, Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01C 7/02 (2006.01); H05B 3/14 (2006.01); H02H 9/02 (2006.01);
U.S. Cl.
CPC ...
H05B 3/146 (2013.01); H02H 9/026 (2013.01); H05B 2203/02 (2013.01);
Abstract
A pPTC heating device having areas with different power densities distributed over the surface of the device. The device is constructed using a base layer composed of a pPTC material having a layer of sectioned conductive plates disposed over and under the layer of pPTC such as to control the path of the current through the device, thereby controlling resistance of the device and the power density of the device.