Ultrasonic dispersion nozzle having internal shut-off mechanism with barrier fluid separation
US4930700A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1988 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Oct 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S482/901
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An ultrasonic nozzle includes an atomizing surface for producing an atomized liquid spray; a liquid-feed passageway for supplying the process liquid to the atomizing surface, the passageway having a first diameter section and a second fluidly connected smaller diameter section, with a shoulder defined therebetween; an internal shut-off assembly for preventing the supply of process liquid to the atomizing surface, the shut-off assembly including a shut-off rod slidably positioned within the passageway and having a sealing end adapted to cooperate with the shoulder to prevent the supply of process liquid to the atomizing surface, an actuator piston connected with the opposite end of the shut-off rod and slidable within a cylinder bore that is in fluid communication with the passageway, and a valve actuator for slidably moving the piston and shut-off rod in the passageway between a first closed position in which the supply of liquid to the atomizing surface is prevented and a second open position in which the supply of liquid to the atomizing surface is permitted; a barrier fluid provided in the cylinder bore between the passageway and the piston at a pressure higher than that of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.