Float-responsive valve with premature closure prevention
US7243669B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 18, 2004 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Aug 14, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7722
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A float-responsive valve includes a valve actuator that is selectively responsive to operation of a float to move from a first position to a second position in which the valve actuator holds the valve element in its open position. When the valve actuator is in the second position thereof, fluid pressure that would otherwise tend to force the valve element toward its seat is essentially incapable of closing the valve element. Preferably, a force vector applied through a flapper-type valve actuator forms an essentially nonnegative, more preferably generally collinear, angle with a bisector line passing through a pivot axis of the valve actuator and a primary contact point between the valve actuator and the flapper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.