Fluid sprinkling – spraying – and diffusing – Distributor having thermal expansion joint – differentially...
Reissue Patent
2008-05-27
2008-05-27
Nguyen, Dinh Q. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Distributor having thermal expansion joint, differentially...
C239S079000, C239S081000, C239S132000, C239S139000, C239S591000
Reissue Patent
active
09790585
ABSTRACT:
The present invention discloses a thermal spray apparatus with improved thermal efficiency and wear resistance in both the nozzle and barrel combustion chamber. Specifically, disclosed herein is a thermal spray apparatus for spraying substrate coatings, comprising a high velocity oxygen fuel (HVOF) gun wherein said gun includes a combustion chamber generating heated flow therefrom and a nozzle downstream from said chamber. The nozzle and/or chamber contain a first layer of material heated by the flow, and a second layer of material which contacts the first layer when said first layer is heated. The first layer has a thermal conductivity that is lower than said second layer and preferably a lower thermal expansion coefficient. In use, the contact of the first heated layer of material with the second layer operates to remove heat from the first layer therein providing automatic/self-regulating temperature control of the HVOF apparatus.
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Goodfellow-Tungsten Carbide/colalt Material Information, Internet document, www.goodfellow.com.
Goodfellow Material Information for Copper, internet document, www.goodfellow.com.
Coon Gerald L.
Nguyen Dinh Q.
Tafa, Incorporated
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