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US 9,427,756 B2Granted
Powder feed assembly for an enriched air flame spray apparatus and associated method
OwnerViacheslav E. Baranovski, Andrew V. Baranovskiinventors
Life of this patent
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Abstract
A powder feed assembly comprises a powder hopper and a selectively rotating blade. The powder hopper has a wall and a floor together forming a chamber. A circumferential horizontal gap is defined between the wall and the floor to enable powder to exit the chamber. The selectively rotating blade has a body portion positioned within the chamber and one or more blade portions at least partially extending into the gap.
Claims15
A powder feed assembly comprising:
- a powder hopper having a wall and a floor together forming a chamber, a circumferential horizontal gap being defined between the wall and the floor to enable powder to exit the chamber;
- a selectively rotating blade having a body portion positioned within the chamber and one or more blade portions at least partially extending into the gap;
- a receiving funnel positioned to receive powder exiting the chamber through the gap and to supply the received powder to a hose;
- and
- a porous bushing having a plurality of holes defined therein, a size of the holes selected to permit a carrier gas to exit the chamber through the porous bushing but to not permit the powder to exit the chamber through the porous bushing, the porous bushing being positioned between the chamber and an inner volume of the receiving funnel.
2 more elements
A method of feeding powder comprising:
- placing a desired amount of a powder into a powder hopper of a powder feed assembly, the powder hopper having a wall and a floor together forming a chamber, a circumferential horizontal gap being defined between the wall and the floor to enable at least some of the powder to exit the chamber;
- selectively rotating a blade of the powder feed assembly to cause at least some of the powder to exit the chamber through the gap, the blade having a body portion positioned within the chamber and one or more blade portions at least partially extending into the gap;
- receiving, into a receiving funnel, powder exiting the chamber through the gap;
- supplying the received powder to a hose;
- and
- equalizing the pressure between the receiving funnel and the chamber using a pressure-equalizing pipe fluidly connecting the chamber and the receiving funnel;
- wherein the powder feed assembly further comprises a porous bushing having a plurality of holes defined therein, a size of the holes selected to permit a carrier gas to exit the chamber through the porous bushing but to not permit the powder to exit the chamber through the porous bushing, the porous bushing being positioned between the chamber and an inner volume of the receiving funnel.
4 more elements
Dependencies are inferred from the claim text.