Liquid level detecting device and method of manufacturing same
US7703322B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2006 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Mar 30, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid level detecting device for detecting liquid level contained in a tank includes a float and an arm that moves in a prescribed manner when liquid level changes, a permanent magnet for forming a magnetic field, a hall IC for generating an electric signal in response to the motion of the magnetic field, a rotary member linked with the arm and the permanent magnet for moving the magnetic field relative to the hall IC as the float and the arm move, a terminal member for connecting the hall IC to an outside control circuit; and a mold body including a resinous holder for holding the hall IC and the terminal member. The resinous holder includes a sheath for insulating the hall IC from heat and mechanical stress generated when the mold body is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.