High-pressure sensor
US6092426A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1999 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Jun 28, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M63/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.