Dispensing – With discharge assistant – With discharge volume varying means
Patent
1975-03-19
1976-09-28
Reeves, Robert B.
Dispensing
With discharge assistant
With discharge volume varying means
222368, G01F 1100, G01F 1110
Patent
active
039826732
ABSTRACT:
A ball having a variable volume cavity therein is integrally machined on a haft which is rotatably supported between two bearings. The ball is maintained in intimate sliding contact with a hopper seal at all times. An air-operated actuator is used to rotate the shaft and ball 180.degree. to place the ball in its load and unload positions. The variable volume cavity allows volumetric adjustments to be safely made even when dispensing sensitive explosive powders, such as lead azide. A hopper containing the explosive powder supply is bearing-mounted above the ball and funnel on two vertical shafts. The weight of the hopper maintains intimate contact between an electrically conductive plastic seal insert in the bottom of the hopper and the surface of the ball on which it rests and prevents leakage of powder during fill and discharge of the ball cavity.
REFERENCES:
patent: 774326 (1904-11-01), Kelly
patent: 2820577 (1958-01-01), Winters
patent: 3253496 (1966-05-01), Beach et al.
patent: 3278090 (1966-10-01), Wahl
patent: 3353722 (1967-11-01), Mehta
Hartman Wayne J.
Lestage Joseph C.
Van Brussel William R.
Edelberg Nathan
Erkkila A. Victor
Reeves Robert B.
Scherbel David A.
The United States of America as represented by the Secretary of
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