Air conditioner test gauge with pressure zone markings
US4829829A · kind A · utility
5Cited by
5References
10Claims
0Family size
Inventor
Key dates
| Filing date | Jul 22, 1988 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | Jul 22, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/3662
- 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.