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:
Nov. 01, 2022
Filed:
Feb. 16, 2021
Applicant:
Littelfuse, Inc., Chicago, IL (US);
Inventors:
Jianhua Chen, Sunnyvale, CA (US);
Rimantas Radzys, Chicago, IL (US);
Assignee:
Littelfuse, Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01C 7/02 (2006.01); H01B 1/04 (2006.01); H01C 17/065 (2006.01); H01C 1/14 (2006.01);
U.S. Cl.
CPC ...
H01C 7/027 (2013.01); H01B 1/04 (2013.01); H01C 1/1406 (2013.01); H01C 17/06586 (2013.01);
Abstract
A novel heater is disclosed for a temperature sensitive actuator. The heater is a polymeric positive temperature coefficient (PPTC) device consisting of conductive filler and semi-crystalline polymer. The PPTC heater is strategically designed to have a predetermined self-regulation temperature suited to whatever application utilizes the heater. Physical characteristics of the PPTC heater, such as gap width and thickness, enable the current flow through the heater to be strategically controlled.