Claims
- 1. A rotary bell cup for atomizing particulate material including paint comprising:a generally conical overflow surface having a generally constant flow angle defining a radially inward central axial opening and a radially outward atomizing edge having a bevel; a central flat portion disposed between said conical overflow surface and said radially inward central axial opening; and a deflector having a deflection surface of generally rotational symmetry disposed in front of said central opening having a rear flat surface with a plurality of passageways disposed therethrough opposite said central opening and said rear flat surface being generally parallel to said central portion, and a rear conical surface being generally parallel to said conical overflow surface.
- 2. A rotary atomizer bell cup of claim 1 including a frustoconical rear cover disposed behind said conical overflow surface.
- 3. A rotary atomizer bell cup of claim 2 including a plurality flushing apertures leading from said central axial opening providing flushing fluid to said frustoconical rear cover.
- 4. A rotary atomizer bell cup of claim 1 wherein the flow angle of said conical overflow surface is more than 60 degrees at all points between the deflector and the atomizing edge.
- 5. A rotary atomizer bell cup of claim 1 wherein paint flow along the overflow surface between the deflector and atomizing edge is substantially laminar.
- 6. A rotary atomizer bell cup of claim 1 wherein paint atomized by said rotary atomizer has a deviation in particle size less than 50 microns.
- 7. An assembly as set forth in claim 1 wherein said bevel on said radially outward atomizing edge is disposed upon an outside surface surrounding said overflow surface.
- 8. An assembly as set forth in claim 1 wherein said generally conical overflow surface includes a constant surface between said central portion to said radially outward atomizing edge.
- 9. A rotary bell cup for atomizing particulate material including paint comprising:a generally conical overflow surface having a flow angle defining a radially inward central axial opening and a radially outward atomizing edge having a bevel surrounding said conical overflow surface; a central flat portion disposed between said conical overflow surface and said radially inward central axial opening; a rear cover disposed behind said overflow surface having a frustoconical shape; a plurality of flushing apertures conveying from said central axial opening flushing fluid to said frustoconical rear cover for cleaning said rear cover; and a deflector having a deflection surface of generally rotational symmetry disposed in front of said central opening having a rear flat surface generally parallel to said central portion and a rear conical surface generally parallel to said conical overflow surface.
- 10. A rotary atomizer bell cup of claim 9 wherein the flow angle of said conical overflow surface is more than 60 degrees at all points between the deflector and the atomizing edge.
- 11. A rotary atomizer bell cup of claim 9 wherein paint flow along the overflow surface between the deflector and atomizing edge is substantially laminar.
- 12. A rotary atomizer bell cup of claim 1 wherein paint atomized by said rotary atomizer has a deviation in particle size less than 50 microns.
- 13. An assembly as set forth in claim 9 wherein said bevel on said radially outward atomizing edge is disposed upon an outside surface surrounding said overflow surface.
- 14. An assembly as set forth in claim 9 wherein said generally conical overflow surface includes a constant surface between said central portion to said radially outward atomizing edge.
Parent Case Info
This application claims priority to U.S. Provisional Patent Application Ser. No. 60/079,565, filed Mar. 27, 1998 and is a continuation of Ser. No. 09/271,477 now U.S. Pat. No. 6,189,804 filed Mar. 17, 1999 now U.S. Pat. No. 6,189,804.
US Referenced Citations (25)
Foreign Referenced Citations (1)
Number |
Date |
Country |
251232 |
Sep 1962 |
AU |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/079565 |
Mar 1998 |
US |
Continuations (1)
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Number |
Date |
Country |
Parent |
09/271477 |
Mar 1999 |
US |
Child |
09/769706 |
|
US |