Pneumatic powder metering apparatus with improved powder throttl

Details Pneumatic powder metering apparatus with improved powder throttl Pneumatic powder metering apparatus with improved powder throttl

1983-11-03

1986-02-11

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51438, 406134, 406144, 251121, 251205, 251267, B24C 700

Patent

active

045691614

ABSTRACT:
A gap is formed between a small diameter powder feed supply orifice and a throttling "needle" which is flattened at its working tip end. The needle is vertically adjustable to vary size of the gap. The powder is a finely divided abrasive material which is delivered to a handpiece in the form of a powder/air mixture for use in abrasive jet machining operations, for example. The powder throttling mechanism cooperates with pressurized air directed at the gap from an internal nozzle to entrain the powder for the mixture. The apparatus is vibrated by a ball and raceway mechanism, the ball being propelled therearound by pneumatic pressure. The apparatus is compact; easy to maintain, operate and clean; and requires no electrical power source of any kind.

REFERENCES:
patent: 2524919 (1950-10-01), Meincke
patent: 2766558 (1956-10-01), Black
patent: 2778223 (1957-01-01), Kimbrell
patent: 3563421 (1971-02-01), Coates et al.
patent: 3618263 (1971-11-01), Weijsenburg
patent: 4067150 (1978-01-01), Merrigan
patent: 4381898 (1983-05-01), Rotolico et al.
patent: 4482322 (1984-11-01), Hain et al.
Renken, H. H., "Dual Control Metering Valve", IBM Technical Disclosure Bulletin, vol. 17, No. 11, Apr. 1975.

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