Nozzle assembly for HVLP spray gun
US5344078A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Apr 22, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B7/0815
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved nozzle assembly for an HVLP paint spray gun. The nozzle assembly includes at least an air cap and a fluid tip, and preferably also includes a baffle for uniformly distributing air flow through the nozzle assembly. The fluid tip has a conical front end which terminates at a fluid discharge orifice adjacent a vertex. The fluid tip is positioned to extend to and to be in axial alignment with an opening in the air cap. The fluid discharge orifice is located at substantially the front face of the opening. The fluid tip and the air cap form an annular air discharge opening. The conical front end of the fluid tip has a vertex angle of from 60.degree. to 90.degree., and preferably about 60.degree.. The air cap has a thin wall surface surrounding the opening and has an annular interior surface surrounding the opening in the shape of a frustum of a right circular cone having a vertex angle of from 100.degree. to 150.degree. and preferably of from about 124.degree. to about 128.degree.. The design of the air cap interior and of the fluid tip maximize the energy in the low velocity air prior to interaction with fluid discharged from the nozzle to optimize atomization efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.