Float valve for a christmas tree watering system
US6966334B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jun 24, 2003 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | May 24, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7485
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The float valve has a water inlet, a perforated bottom surface and a lift valve mounted between the water inlet and the bottom surface. A float and a rocker arm are used to raise and lower the disc of the lift valve in response to a water level inside the housing. The valve seat has a first vertical axis and the water inlet has a second vertical axis and the first and second vertical axes are parallel to each other and are spaced apart a distance corresponding substantially to a radius of the valve seat. In another feature, a stud on the rocker arm interferes with the valve stem when the float is in a down position, for leaning the valve stem away from the axes of the valve seat and of the water inlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.