Multidose delivery pump
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United States of America Patent
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-
Jan 6, 2004
Grant Date -
Jun 26, 2003
app pub date -
Nov 1, 2002
filing date -
Apr 13, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a delivery pump to be coupled to the neck of a container filled with a liquid to be delivered comprising: a hollow body defining a suction and compression chamber for the liquid having a suction duct for the liquid, a tight piston sliding in the hollow body, a delivery duct for the liquid communicating with the suction and compression chamber; calve mechanism adapted to regulate inflow and outflow of liquid into and from the suction and compression chamber, elastic mechanism arranged between the tight piston and the hollow body. The delivery pump comprises first constraint mechanism fixed to the hollow body and selectively cooperating with second constraint means fixed to the tight piston to define the stroke of said tight piston. The stroke can be varied according to the mutual position of the first and second constraint mechanism.
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