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. 02, 2005
Filed:
Dec. 13, 2002
Sadamitsu Harada, Gifu, JP;
Katsuki Aoi, Aichi, JP;
Sadamitsu Harada, Gifu, JP;
Katsuki Aoi, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A non-resonance type knock sensor is provided which comprises a support member having a main body portion in the form of a hollow post and a radially outward flange portion at an axial end of the main body portion, the main body portion having an abutment at an outer circumferential periphery thereof, a piezoelectric element having a hole through which the main body portion extends and placed on the flange portion, a weight having a hole through which the main body portion extends and placed on the piezoelectric element, and an elastic device disposed between the abutment and the weight to produce an elastic force for pressing the weight and the piezoelectric element against the flange portion and thereby fixing the weight and the piezoelectric element to the support member.