Air conditioner test gauge with pressure zone markings
US4770044A · kind A · utility
15Cited by
4References
15Claims
0Family size
Inventor
Key dates
| Filing date | Mar 16, 1987 |
| Grant date | Sep 13, 1988 |
| Priority date | — |
| Expiry date | Mar 16, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L7/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A refrigerant system gas pressure check gauge with a valve head opening having a valve pin and shaped to fit on and over the low pressure suction side valve fitting of a refrigeration system, auto or home, with colored zones and safety markings with worded indications including safety danger warnings. The colored zones and safety markings directly match precise pressure zones on the valve stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.