Low power electromagnetic pump
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 24, 2002
Grant Date -
Dec 6, 2001
app pub date -
Jul 24, 2001
filing date -
Jun 18, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electromagnetic pump including a housing having an interior fluid containing region, a check valve operatively flow in a direction from an inlet toward an outlet and blocking fluid flow in a direction from the outlet to the inlet, an electromagnet carried by the housing located external to the fluid containing region, and a barrier of fluid impervious material for isolating the electromagnet from the fluid. An armature movable in the housing through pumping and return strokes has a pole portion located for magnetic attraction by the electromagnet and has a plunger portion extending from the pole portion. The armature plunger and pole portions have formations crimped together to secure the plunger and pole portions together. The barrier or an end surface of the armature pole portion are shaped to enhance separation of the barrier and armature pole portion at the beginning of the return stroke. The housing is provided with shims for adjustment of the delivered stroke volume.
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