Flexible dispenser with bladder
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United States of America Patent
Stats
-
Nov 18, 1997
Grant Date -
N/A
app pub date -
May 31, 1995
filing date -
May 31, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dispenser for fluid material includes a flexible container. A piston is adapted for movement within the container. An expansible bladder is connected to the piston. A first flow restrictor allows flow of displacement fluid only from outside the container into the interior of the bladder. A second flow restrictor allows flow of material only from within an interior portion of the container external to the bladder to outside the container. The container also preferably includes a rod supported in the container, the piston being movable on the rod. In another embodiment the bladder is connected to a collar movable on the rod.
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