Electromagnetic pump with increased accuracy
AssigneeMikuniadec Corporation
InventorsKubota Kenichi, Takehana Norio, Sato Kiyoshi, Maita Katuya
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Abstract
An enabling an easy increase in the accuracy of a plunger stroke is provided in an electromagnetic pump, in which an inner yoke and a plunger constitute a magnetic circuit, and where an electromagnetic force acts on the magnetic circuit so that a magnetic gap between the inner yoke and the plunger is diminished. The plunger is reciprocated within a cylinder by the electromagnetic force and a restoration force of a spring. In such an electromagnetic pump, the stroke of the plunger is limited by two planes of respective members disposed opposite each other with the cylinder being disposed therebetween.
Claims8
An electromagnetic pump comprising:
- a cylinder;
- a plunger being reciprocated in a first direction and then in an opposite second direction within said cylinder;
- a magnetic circuit including an inner yoke and said plunger, said inner yoke and said plunger being spaced apart by a magnetic gap;
- magnetomotive force means acting on said magnetic circuit to stroke said plunger in said first direction to reduce said magnetic gap between said inner yoke and said plunger;
- a spring providing a restoration force to return said plunger in said opposite second direction;
- and
- stroke limiting means to limit the stroke of said plunger in said first direction;
- said stroke limiting means including two members having respective planes thereof disposed opposite each other with the cylinder being interposed between said respective planes.
Dependencies are inferred from the claim text.