Measuring and testing – Dynamometers – Responsive to force
Patent
1985-09-25
1987-08-18
Chapman, John
Measuring and testing
Dynamometers
Responsive to force
73 35, 73115, 73754, 73DIG4, 310338, G01L 116, G01L 2310
Patent
active
046868615
ABSTRACT:
The present invention relates to a gasket type pressure sensor mounted on a vibrating body such as a cylinder head of an engine generating vibration derived from knocking and fuel injection, and used to detect pressure fluctuation by means of piezoelectric elements. An object of the present invention is to prevent an oil- and water-leakage from a portion of the gasket type pressure sensor and eliminate caulking and electrical shortcircuiting. This is accomplished by placing a presser metal portion between the piezoelectric elements and the seam of a metal case which encloses them.
REFERENCES:
patent: 3151258 (1964-09-01), Sonderegger et al.
patent: 4227403 (1980-10-01), Dooley et al.
patent: 4524625 (1985-06-01), Takeuchi
patent: 4566316 (1986-01-01), Takeuchi
Chapman John
NGK Spark Plug Co. Ltd.
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