Drain valve
US6109289A · kind A · utility
7Cited by
0References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1999 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Aug 18, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/3105
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A drain valve of an air braking system for vehicles has a drainage piston, a main sump and auxiliary sump. Moisture passes from the main sump to the auxiliary sump in response to pressure at a signal port which closes off air supply through ports. A reduction in pressure at the signal port causes the ports to be reconnected and allows moisture to be expelled through the drainage outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.