Liquid level sensing device with double-layer flexible tube and packing structure thereof
US11073418B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2019 |
| Grant date | Jul 27, 2021 |
| Priority date | — |
| Expiry date | Jan 1, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/74
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid level sensing device and a packing structure are provided. An outer tube fastener is connected to a signal module. A protective soft tube is connected to the outer tube fastener. An end of a double-layer flexible tube is connected to the protective soft tube. The double-layer flexible tube includes a flexible conductive outer tube and a fluorine-containing plastic inner tube coaxially attached in the flexible conductive outer tube. The fluorine-containing plastic inner tube is made of a flexible material. The flexible conductive outer tube is made of a conductive flexible material to form a grounding layer. A sensing module is disposed in the fluorine-containing plastic inner tube. A magnetic floater is assembled outside the double-layer flexible tube. A hanger is connected to another end of the double-layer flexible tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.