Pump dispenser having inlet and outlet ports which are held closed during periods of non use
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 28, 1992
Issued Date -
N/A
app pub date -
Sep 4, 1990
filing date -
Nov 27, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An atomizing fluid dispenser has a pump chamber defined by a hollow vertical region defined by adjacent portions of interconnected upper and lower cylinders, a vertical member and a piston. The chamber has a first fluid entry port and a second fluid discharge port. The second port is opened and the first port is closed during a downstroke and the first port is opened and the second port is closed during an upstroke. Both ports are closed during periods of non use.
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Family
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Cited Art Landscape
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