Variable displacement pump
AssigneeMicro Matic USA, Inc.
InventorJoseph M. Lisiecki
Life of this patent
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Abstract
Provided are apparatuses and methods for a variable displacement pump. An apparatus may include a motor having both a clockwise rotation and a counterclockwise rotation. An eccentric mechanism comprising a first eccentric and a second eccentric, the second eccentric being rotatable within the first eccentric. A stop mechanism including at least one stop plate configured to limit a rotational movement of the second eccentric within the first eccentric. A piston operably coupled to the eccentric mechanism, wherein a displacement of the piston is mechanically adjustable based on a relative rotational position of the first eccentric and the second eccentric. A housing configured to support the motor, the eccentric mechanism, the stop mechanism, and the piston.
Claims20
A variable displacement pump, comprising:
- a motor having both a clockwise rotation and a counterclockwise rotation;
- an eccentric mechanism comprising a first eccentric and a second eccentric, the second eccentric being rotatable within the first eccentric;
- a stop mechanism including at least one stop plate configured to limit a rotational movement of the second eccentric within the first eccentric;
- a piston operably coupled to the eccentric mechanism, wherein a displacement of the piston is mechanically adjustable based on a relative rotational position of the first eccentric and the second eccentric;
- and
- a housing configured to support the motor, the eccentric mechanism, the stop mechanism, and the piston.
A method of dispensing a liquid using a variable displacement pump, the method comprising:
- operating a motor to rotate in a first direction to achieve a first dosage;
- rotating an eccentric mechanism comprising a first eccentric and a second eccentric to adjust a displacement of a piston;
- limiting rotational movement of the second eccentric within the first eccentric using a stop mechanism;
- displacing the liquid using the piston to dispense the liquid through an outlet;
- and
- monitoring motor rotations with a rotation sensor to ensure accurate dosage.
Dependencies are inferred from the claim text.