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:
Aug. 08, 1989
Filed:
Jan. 29, 1988
Ching-Jui Ting, Hsin-Chu, TW;
Cheng-Jien Peng, Hsin-Chu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
An electric resistance heating element for heating fluids includes a plurality of ring-shaped members made of a ceramic material having a positive temperature coefficient (PTC) disposed in concentric generally coplanar relationship, one around the other, and spaced apart from each other to form through passages for fluid flow therebetween. Electrode layers are formed at the two opposite ends of each ring and a pair of electrically conductive securing ring members are each securely soldered to a respective one of the electrode layers. Each securing ring member is integrally formed with two diametrical cross members soldered to each ceramic ring-shaped members and with each cross member having spaced grooves radially engaging and positioning the ring-shaped ceramic members. The outer periphery of each securing ring member incorporates a plurality of radially extending lugs for mounting the heating element for use and for making electrical connection between the securing ring member and a power supply.