Dispensing – With discharge assistant – Actuated by pressure of or suction on material to be dispensed
Patent
1984-03-23
1986-04-08
Rolla, Joseph J.
Dispensing
With discharge assistant
Actuated by pressure of or suction on material to be dispensed
222 71, 7386435, B65D 8854
Patent
active
045807035
ABSTRACT:
A precision fluid measuring apparatus is provided which is simple to operate and manufacture, but which permits precise measurement of fluid quantities in a closed system. A flow passageway is defined by a conduit having three sets of apertures wherein the first set of apertures is located at one end of the conduit and the other two sets of apertures are located at the other end of the conduit. A blocking member is positioned in the flow passageway of the conduit and between the second and third sets of apertures. An envelope is provided which surrounds the three sets of apertures and which is slidable along the conduit between an upstream and a downstream position. Collars are provided which seal the first set of apertures and the second set of apertures when the envelope is in the downstream position. The collars provide a hermetic seal between the envelope and the conduit. Further, grooves are provided on the conduit to defeat the hermetic seal in the envelope in the vicinity of the first set of apertures when the envelope is in the downstream position.
Noland Kenneth
Rolla Joseph J.
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