Nozzle method and apparatus
US4749125A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1987 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Jan 16, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B5/0255
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A nozzle apparatus and method for electrically charging and dispensing fluids and other flowable materials, comprising a fluid reservoir and a housing. The housing includes walls which define a chamber having an elongated slot at the tip thereof. The slot is resiliently compressible. The reservoir communicates with the chamber such that the fluid is introduced into the chamber at a controlled rate and a low hydrostatic pressure. A shim is placed within the chamber slot partially occluding fluid flow through the slot. The shim and the amount of compression of the slot defines with precision the size and shape of the slot. The shim and fluid are electrically connected to a high voltage source through the housing. The fluid forms a meniscus about the housing slot whereby upon actuation of the high voltage source, the fluid is dispensed as one or more charged fluid paths or a plurality of charged droplets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.