Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1993-04-13
1994-02-08
Rose, Robert A.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51322, 51439, B24C 100
Patent
active
052839850
ABSTRACT:
A fuel and oxygen mixture is combusted within an internal burner combustion chamber at temperatures ranging from 250 psi to 1,000 psi. The products of combustion are directed through a restricting nozzle throat and a supersonic expansion nozzle section into an elongated duct formed by an extended nozzle length. Abrasive particles are introduced into the supersonic flow jet stream near the entrance to the elongated duct to accelerate the particles to extreme velocity, with the combustion pressure maintained sufficiently high to limit the jet stream temperature to that which is insufficient throughout the elongated duct to raise the particle temperatures to the plastic point of the particle material. The temperature of the supersonic gas flow through the elongated duct may be reduced by the introduction of a cooling flow into the jet stream beyond the flow-restricting nozzle throat. The cooling flow may be a flow of water or other liquid coolant or cool compressed air.
REFERENCES:
patent: 2990653 (1961-07-01), Browning
patent: 3854997 (1974-12-01), Peck et al.
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