Pressure swirl atomizer with closure assist
US8523089B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2011 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Aug 1, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B1/3452
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pressure swirl atomizer includes a nozzle having an exit orifice and a plurality of tangential swirl channels and a pintle that is movable within a pintle bearing between a closed position that closes the exit orifice and an open position that opens the exit orifice. The atomizer also has a pole piece having a channel, and the pole piece and the pintle are separated by an air gap when the pintle is in the closed position. A space between the pintle and the pintle bearing, the air gap, and the channel together form at least a part of a return path. Fluid from the tangential swirl channels drains through the return path when the pintle is in the closed position. To open the atomizer, a solenoid generates a magnetic force when energized, attracting the pintle toward the pole piece into the open position. A check valve disposed in the return path generates a fluid back pressure when the solenoid is de-energized to push the pintle toward the closed position. The fluid back pressure helps prevent the pintle from getting stuck in the open position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.