Timed shut-off mixing water valve
US4768553A · kind A · utility
10Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 19, 1988 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | Jan 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87088
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball clutch mechanism couples a faucet knob to the splined end of a valve stem for releasing the valve stem when the knob is fully depressed. A dashpot damped return spring urges the valve stem toward valve closed position when the clutch mechanism releases. The same dashpot controlled return spring closes the valve if the knob is released either before or after full travel inward. Rotation of the knob rotates the valve stem to determine water temperature by mixing hot and cold supplies. Check valves control passages that are provided to vent the lines during fluid flow and to drain the lines when the system is serviced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.