Measuring needle with non return valve function
US8528430B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 2011 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Jan 25, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L19/0007
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for measuring pressure or temperature in a heating or a cooling system and where the device is a measuring needle complete (1) comprising a measuring needle housing (6) with one cavity (20) and a spring-loaded non return valve (8), where the non return valve, in a measuring position, has an open communication with the probe (10) via the measuring needle housing and a hose nipple, via a hose, to a measuring instrument. This open communication is closed immediately as soon as the measuring is completed and the measuring needle (1) is removed from the measuring nipple. After measuring, due to this immediate closing, leakage of the enclosed fluid that exists in the complete measuring needle (1) and the measuring hose (5) is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.