Pump made of plastic for dispensing products from containers
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United States of America Patent
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Jul 20, 1999
Issued Date -
N/A
app pub date -
Nov 7, 1996
filing date -
Mar 10, 1995
priority date (Note) -
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Abstract
An all plastic pump for liquids has an elastic bellows in the shape of a spiral incorporates an integral spring. The turns of the bellows are arranged with contracted areas of the spiral formed with a protruding stiffening rib and sidewalls having a convex outwardly projection region.
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Cited Art Landscape
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