Proximity sensing head
US4408159A · kind A · utility
27Cited by
2References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1981 |
| Grant date | Oct 4, 1983 |
| Priority date | — |
| Expiry date | Apr 2, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A proximity sensor includes a housing having one compartment which houses the components of an oscillator control circuit and another compartment which houses a sensing head including a ferrite core and oscillator coil assembly. An end cap closes the open end of the sensing head compartment. A fluid passage is provided in the end cap which permits fluid to flow around the oscillator coil assembly. A relatively thick seal assembly is interposed between the one compartment and the oscillator coil assembly to prevent the passage of fluid into the one compartment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.