Lubricated water valve
US4651769A · kind A · utility
1Cited by
8References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 12, 1986 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Mar 12, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86549
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A water valve with a hollow piston axially reciprocable in a cylindrical bore of a surrounding sleeve is provided, for long-term lubrication of the piston, with grease chambers formed as inwardly open peripheral recesses on the inner sleeve surfaces at opposite extremities thereof. The valve is preferably of the single-handle mixing type, the piston being rotatable within the sleeve for selectively connecting a cold-water inlet and/or a hot-water inlet with a common outlet; the region of water flow between these ports is isolated by sealing rings from the two grease chambers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.