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:
Apr. 28, 1987
Filed:
Oct. 25, 1984
Shogo Asano, Yokohama, JP;
Juhei Takahashi, Yokohama, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A knock sensor has a substrate having a projection at the center of one surface thereof and a bore at the center thereof, a vibrating plate having a bore at the center thereof and having a plate rigidifying projection means at the center portion of one surface thereof, the central portion being welded to the projection on the substrate, a piezoelectric ceramic element having a bore in the center thereof and electrodes on opposite faces thereof and secured to the other surface of the vibrating plate, and a terminal having a lead projection extending through the bore in the substrate, the bore in the vibrating plate and the bore in the piezoelectric ceramic element and connected to the electrode on the face of the piezoelectric ceramic element which faces away from the vibrating plate.