Sight glass apparatus
US7540187B1 · kind B1 · utility
20Cited by
14References
26Claims
0Family size
Inventor
Key dates
| Filing date | Jul 17, 2006 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Jul 18, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sight glass apparatus providing visual information concerning the presence of absence of liquid in a refrigeration system has a sight glass with a pair of clear glass bodies secure to a housing having a chamber for the liquid. The bodies have angled prismatic surfaces. One body includes a convex lenses that directs light to a colored member that reflects a colored toroid image when the chamber is full of liquid. A moisture sensing element is mounted on the sight glass to identify the presence of water in refrigeration and air conditioning systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.