High-pressure sensor
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United States of America Patent
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Jul 25, 2000
Grant Date -
N/A
app pub date -
Jun 28, 1999
filing date -
Jul 14, 1998
priority date (Note) -
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Abstract
A high-pressure sensor specially for monitoring pulsating hydraulic pressure impulses, as for example in injection systems of combustion engines is provided with a pressure space shaped balloon-like before the diaphragm part, enabling optimal measuring signals to be combined simultaneously with significantly reduced mechanical forces in the welded joint. In addition, welding techniques are proposed enabling a gapless internal welding zone to be achieved, so that notch effects and migratory cracks resulting from these and leading to fractures are obviated. As optimal connection between measuring head and threaded body a two-stage welding routine is proposed first an internal weld is performed by electrical upset welding and then external welding by electron beam, inert gas or laser welding.
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