Pressure differential control valve for compressed air system
US5458676A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1994 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | Apr 28, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/004
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A compressed air system includes an air dryer which dries compressed air before the compressed air is communicated to a reservoir. The air dryer includes a desiccant which is purged by using air stored in the reservoir. A pressure reference purge control valve is installed between the air dryer and the reservoir and includes a housing which defines a pressure reference volume. A pressure which is a function of the highest pressure level communicated to the reservoir is trapped in the reference volume. The valve permits purging only until a pressure is reached which is a predetermined pressure drop below the reference pressure level, whereupon purging is terminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.