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:
Apr. 11, 2017
Filed:
Aug. 06, 2012
Martyn A. Matthiesen, Fremont, CA (US);
Jianhua Chen, Sunnyvale, CA (US);
Matthew P. Galla, Holly Springs, NC (US);
Anthony Vranicar, Santa Clara, CA (US);
Wayne Montoya, Redwood City, CA (US);
Christopher Pasma, Mountain View, CA (US);
Martyn A. Matthiesen, Fremont, CA (US);
Jianhua Chen, Sunnyvale, CA (US);
Matthew P. Galla, Holly Springs, NC (US);
Anthony Vranicar, Santa Clara, CA (US);
Wayne Montoya, Redwood City, CA (US);
Christopher Pasma, Mountain View, CA (US);
Littlefuse, Inc., Chicago, IL (US);
Abstract
A circuit protection device includes a substrate with first and second electrodes connected to the circuit to be protected. The circuit protection device also includes a heater element. A sensing element facilitates an electrical connection between the first and second electrodes. A flux material is provided around the sensing element. In a preferred embodiment, the flux contains a first component that is a polar material and a second component that is a non-polar material. A spring element exerts a force on the sensing element. The sensing element resists the force applied by the spring element. Upon detection of an activation, or fault, condition, the sensing element loses resilience and no longer resists the force exerted by the spring element, resulting in the spring element severing the electrical connection between the first and second electrodes. The flux allows the spring element to sever the electrical connection without dragging the sensing element.