Pressure sensor for installation in a wall element subjected to

Details Pressure sensor for installation in a wall element subjected to Pressure sensor for installation in a wall element subjected to

1984-07-05

1986-05-13

Myracle, Jerry W.

Measuring and testing

Internal combustion engine or related engine system or...

Compression

73754, 338 36, G01M 1500

Patent

active

045878404

ABSTRACT:
To provide an unyielding support surface for a film-type, typically thick-film resistor (10) made of pressure-responsive resistance material, an unyielding pressure-tight mass of insulating material, for example a melt of glass, ceramic, or suitable plastic, is introduced into a wall portion of a wall element (11) in which a fluid pressure medium, such as high-pressure fluid for injection to a Diesel engine, is retained. The insulating mass is, preferably, formed as a plug element, for example retained within a metal screw which, simultaneously, can form a venting screw for the fuel injection system. One or two electrical conductors (12, 13) pass through the plug element, which if a metal screw, surrounds the insulating mass, the resistance element can extend over the edge of the metal which, then, can form a ground or return connection. The surface of the plug element is either flush with the surface of the wall or, for example, forms a laterally relieved slot extending parallel to the axis of the plug, which slot may be filled with a protective pressure-transmitting compound and covering the electrical resistance element there located, so that the end surface of the screw and pressure-transmitting filler will be flush with the wall (11) confining the pressure medium.

REFERENCES:
patent: 3122919 (1964-03-01), Kendrick
patent: 3270562 (1966-09-01), Ehrenreich et al.
patent: 4027536 (1977-06-01), Heggie

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