Hermetic mounting system for a pressure transducer
US5186055A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1991 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Jun 3, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49103
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure transducer (50) of the type utilizing a diaphragm (8) with strain sensitive elements (14) formed in the diaphragm surface where the strain sensitive elements (14) are connected to an electronics assembly (4) to produce an electrical output in response to deflection of the diaphragm (8). A diaphragm assembly (26) is bonded to an intermediate support member (28) which is in turn bonded to a main support member (32) which is joined to a support collar (42) and hermetically sealed thereto with a sealing glass (40) where each element (2, 28, 32, 42) has a substantially matched coefficient of thermal expansion so as to reduce any induced thermal stresses and resultant measurement errors where the sealing glass (40) and the support collar (42) have a greater coefficient to produce a compressive type seal at high temperature. A pressure fitting (58) is joined to the external fluid pressure to be measured where the fluid is conducted to the diaphragm (8) through a plurality of passageways (30, 34, 56) in the support elements (28, 32, 44). A main housing (48) encloses the pressure sensing assembly (2) and support members (28, 32, 42) thereby providing protection from the environme…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.