Dosing and discharging device for flowable media including powder/air dispersions
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United States of America Patent
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-
May 2, 2000
Issued Date -
N/A
app pub date -
Apr 1, 1997
filing date -
Apr 2, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dosing device (17) for the medical administration of powder (16) through the nose or mouth has a valve body (27) which is movable in a discharge channel (22) between two valve seats (25, 26). During suction, the spherical valve body (27) is raised from the lower, container-sealing valve seat (26) and moved by a flow drag to the upper valve seat (25), so that it closes the discharge channel (22) and terminates dosing. The formation of the air/powder dispersion can be assisted in that the air subsequently sucked into the container is directed onto or into a powder supply or to a powder receiver in a pre-chamber fillable by tilting the device for pre-dosing.
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