Fluid dispenser
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 31, 1990
Issued Date -
N/A
app pub date -
Aug 7, 1987
filing date -
Oct 28, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vacuum-tight and pressure-tight closed storage space in a container is constructionally combined with a thrust piston pump projecting thereinto and a drag piston slidably guided therein and in the initial position of the thrust piston pump is hermetically sealed by an exhaust valve mechanically closed in forcibly controlled manner. The drag piston is adapted to the thrust piston pump in such a way that the storage space can be emptied substantially free with the thrust piston pump.
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