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:
Oct. 22, 1991
Filed:
Sep. 10, 1990
Koji Hatanaka, Higashimatsuyama, JP;
Takashi Aota, Higashimatsuyama, JP;
Jidosha Kiki Co., Ltd., Tokyo, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A ceramic heater type glow plug includes a U-shaped ceramic heater consisting of a resistive ceramic material, a hollow metal holder, an external connecting terminal, a power control resistor, and a connecting unit. The hollow metal holder has a distal end portion for supporting the ceramic heater via insulating members. The external connecting terminal is insulatingly supported at a rear end of the metal holder. The power control resistor is arranged between one of terminal caps at a rear end side of the ceramic heater housed in the metal holder and the external connecting terminal and performs power supply control with respect to the ceramic heater. The connecting unit connects another one of the terminal caps at the rear end side of the ceramic heater to the metal holder. The power control resistor consists of a metal material having a larger positive resistance temperature coefficient than that of the resistive ceramic material constituting the ceramic heater. The connecting unit includes a hollow metal sleeve for insulatingly housing the power control resistor. The rear end of the metal sleeve is caulked to the rear end of the metal holder while the external connecting terminal is fitted in the metal sleeve via an insulating member.