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. 27, 2013
Filed:
Mar. 27, 2009
Shinsuke Itoh, Nagoya, JP;
Shunsuke Maeda, Nagoya, JP;
Masanori Suda, Nagoya, JP;
Toshiyuki Matsuoka, Nagoya, JP;
Shinsuke Itoh, Nagoya, JP;
Shunsuke Maeda, Nagoya, JP;
Masanori Suda, Nagoya, JP;
Toshiyuki Matsuoka, Nagoya, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A glow plug including a pressure sensor () and a heater (). The glow plug includes a position-defining member which defines the positional relationship between the pressure sensor () and the heater () and has a coefficient of thermal expansion greater than that of the heater. The pressure sensor () is fixed at a predetermined sensor reference position relative to the position-defining member. The heater () is held by a heater-holding member () in such manner that an attachment position A of the heater-holding member to the heater can be displaced, with a change in external pressure, relative to a predetermined heater reference position defined by the position-defining member. A displacement transmission member () is arranged between the heater () and the pressure sensor () so as to transmit displacement of the heater () to the pressure sensor (). The coefficient of thermal expansion of the displacement transmission member () is rendered greater than that of the position-defining member.