Dispensing – Supply containers with traps – With trap chamber cutoffs
Patent
1987-06-25
1989-03-14
Shaver, Kevin P.
Dispensing
Supply containers with traps
With trap chamber cutoffs
222447, 222501, 222546, 141340, G01F 1128
Patent
active
048118699
ABSTRACT:
A device for dispensing a predetermined amount of powder from a storage chamber and including a lower measuring chamber. The amount of powder delivered from the measuring chamber is rigourously constant from dispensing stroke to dispensing stroke. The capacity of the measuring chamber can be finely adjusted in accordance with a graduation scale. The dispenser includes a pair of valves and a pusher rod actuating the valves, the lower valve closable under gravity, the upper valve being biased by a single coil spring mounted around the rod. The biasing coil spring is shielded by a sleeve from both chambers, so that the powder never comes in contact with the coil spring.
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Huson Gregory L.
Shaver Kevin P.
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