Fluid sprinkling – spraying – and diffusing – Slinger or splasher; or deflector rotated relative to effluent – Disc impeller type or bowl-like slinger or deflector
Reexamination Certificate
1997-02-05
2001-12-11
Scherbel, David A. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Slinger or splasher; or deflector rotated relative to effluent
Disc impeller type or bowl-like slinger or deflector
C239S224000, C239S591000, C239S700000, C239S703000, C239S704000, C239S708000
Reexamination Certificate
active
06328224
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to rotary coating material dispensers. It is disclosed in the context of a rotary dispenser for a stream of fluidized powder coating material. However, it is believed to have utility in other applications as well.
Various types and configurations of rotary coating material dispensers are known. There are, for example, the rotary coating material dispensers illustrated and described in U.S. Pat. Nos. 3,536,514; 4,037,561; 4,114,564; 4,381,079; 4,447,008; 5,353,995; and, 5,433,387; “Aerobell™ Powder Applicator ITW Automatic Division,” and, “Aerobell™ & Aerobell Plush™ Rotary Atomizer, DeVilbiss Ransburg Industrial Liquid Systems.” No representation is intended that a complete search has been made of the prior art, or that no better art references than those listed are available.
SUMMARY OF THE INVENTION
According to the invention, a dispensing device for a coating material includes an outer portion including a first, inner surface. The outer portion has a central passageway for mounting the outer portion on a rotary shaft for rotating the dispensing device. The dispensing device further includes an inner portion having a second, outer surface shaped complementarily to the first surface and a somewhat bell- or cup-shaped third, inner surface. Means are provided for retaining the inner portion in the outer portion with the first and second surfaces in engagement.
Illustratively, the outer portion is constructed from a first material having mechanical strength to withstand the stresses attending rotation of the dispensing device but being relatively less inert to the movement of coating material across it. The inner portion is constructed from a second material relatively more inert to the movement of coating material across the third surface.
Additionally illustratively, the first and second portions both extend to a circular discharge edge of the dispensing device.
Further illustratively, the apparatus comprises a third portion having a fourth surface cooperating with the circular discharge edge to define an annular discharge slot.
Additionally illustratively, the third portion is constructed from the second material.
Further illustratively, the means for retaining the inner portion in the outer portion comprises means for retaining the third portion in spaced apart relation to the second portion to define the annular discharge slot.
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Aerobell™ Powder Applicator ITW Automatic Division.
Aerobell™ & Aerobell Plus™ Rotary Atomizer, DeVilbiss Ransburg Industrial Liquid Systems.
Barnes & Thornburg
Evans Robin O.
Illinois Tool Works Inc.
Scherbel David A.
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