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:
Jul. 21, 1992
Filed:
Sep. 10, 1990
Koji Hatanaka, Saitama, JP;
Kazuhisa Iizasa, Saitama, JP;
Jidosha Kiki Co., Ltd., Tokyo, JP;
Abstract
A self temperature control type glow plug includes first and second resistor elements and a sheath. The sheath diameter of a first portion of the sheath in which the first resistor element is embedded is set to be smaller than the sheath diameter of a second portion of the sheath in which the second resistor element is embedded, wherein the ratio of the latter diameter of the former diameter ranges from 1.3:1 to 2:1. A tapered portion of the sheath joining the first and second sheath portions encloses a gap larger than at least the sheath diameter of the portion in which the first resistor element is embedded between the first and second resistor elements. The first and second resistor elements are connected to each other within the gap through a connecting means having a substantially zero resistance.