Automatic addition of a corrosion inhibitor to a coolant system by osmotic pressure
US4357236A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 1979 |
| Grant date | Nov 2, 1982 |
| Priority date | — |
| Expiry date | May 17, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P11/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A device for the automatic addition of a corrosion inhibitor to a cooling system, such as in an automobile engine, utilizing osmotic pressure. The device includes a container for a concentrated corrosion inhibitor solution with a semi-permeable osmotic membrane in contact with and separating the inhibitor solution from the coolant in the overflow reservoir. With properly inhibited coolant, the osmotic pressures balance, but if the level of inhibitor in the coolant drops, water passes through the membrane to force inhibitor solution through an overflow tube or opening to mix with the coolant and raise the inhibitor level therein to a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.