Device for automatic addition of a corrosion inhibitor to a coolant system
US4273744A · kind A · utility
4Cited by
11References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1979 |
| Grant date | Jun 16, 1981 |
| Priority date | — |
| Expiry date | Oct 16, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P2011/068
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for the automatic addition of corrosion inhibitor into an automobile coolant system when the coolant mixture is diluted by water having an undesirable level of corrosiveness. The device is in the form of a hydrometer having a hollow stem adapted to receive a quantity of a corrosion inhibitor and having openings in the stem wall allowing contact of the liquid in the coolant system with the corrosion inhibitor when the specific gravity of the coolant liquid decreases below a predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.