Solenoid operating pump
First Claim
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1. A pump for moving a fluid comprising:
- a housing including a body having an inside wall surrounding a chamber, a plurality of longitudinal ribs on said inside wall, a first end having inlet passage means open to the chamber, and a second end having outlet passage means open to the chamber;
first one-way valving means cooperating with the first end to allow forward flow of fluid through the inlet passage means into the chamber and restrict reverse flow of fluid through the inlet passage means out of the chamber;
piston means located in the chamber movable in a forward direction to move fluid out of the chamber through the outlet passage means and allow fluid to flow into the chamber through the inlet passage means and movable in a reverse direction toward the first one-way valving means, said ribs spacing the piston means from the inside wall, said piston means including magnetic means and passage means allowing fluid to flow through the piston means;
second one-way valving means movably mounted on the piston means allowing fluid to flow through the passage means in the piston means on reverse movement of the piston means and restricting flow of fluid through the passage means in the piston means on movement of the piston means in the forward direction; and
solenoid means mounted on the housing operable to sequentially move the piston means in forward and reverse directions.
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Abstract
A pump for moving fluid, as blood, having a cylindrical body defining a chamber. A piston movably located in the chamber carries a one-way valve movable to an open position to allow fluid to flow into the chamber and movable to a closed position to pump fluid from the chamber. One or more solenoids operate to reciprocate the piston in the chamber to pump fluid from the chamber. A one-way valve in an inlet passage to the chamber functions to allow the flow of fluid into the chamber and restrict reverse flow of the fluid out of the chamber through the inlet passage.
51 Citations
38 Claims
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1. A pump for moving a fluid comprising:
- a housing including a body having an inside wall surrounding a chamber, a plurality of longitudinal ribs on said inside wall, a first end having inlet passage means open to the chamber, and a second end having outlet passage means open to the chamber;
first one-way valving means cooperating with the first end to allow forward flow of fluid through the inlet passage means into the chamber and restrict reverse flow of fluid through the inlet passage means out of the chamber;
piston means located in the chamber movable in a forward direction to move fluid out of the chamber through the outlet passage means and allow fluid to flow into the chamber through the inlet passage means and movable in a reverse direction toward the first one-way valving means, said ribs spacing the piston means from the inside wall, said piston means including magnetic means and passage means allowing fluid to flow through the piston means;
second one-way valving means movably mounted on the piston means allowing fluid to flow through the passage means in the piston means on reverse movement of the piston means and restricting flow of fluid through the passage means in the piston means on movement of the piston means in the forward direction; and
solenoid means mounted on the housing operable to sequentially move the piston means in forward and reverse directions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- a housing including a body having an inside wall surrounding a chamber, a plurality of longitudinal ribs on said inside wall, a first end having inlet passage means open to the chamber, and a second end having outlet passage means open to the chamber;
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15. A pump for moving a fluid comprising:
- a body having a first end, a second end, and an inside wll surrounding a chamber, a first end member mounted on the first end of the body, said first end member having an inlet passage open to the chamber;
first one-way valving means located in the passage allowing fluid to flow through the passage into the chamber and restrict the flow of fluid through the passage out of the chamber;
a second end member mounted on the second end of the body, said second member having an outlet passage open to the chamber;
a piston located in the chamber, said piston having a passage, said piston having a core of magnetic material;
a plurality of longitudinal ribs on the inside wall of the body, said ribs spacing the piston from the inside wall;
second one-way valving means mounted on the piston allowing fluid to flow through the piston passage on movement of the piston toward the first end member and restricting the flow of fluid through the piston passage on movement of the piston toward the second end member; and
solenoid means operable to move the piston in the chamber to move fluid through the chamber. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
- a body having a first end, a second end, and an inside wll surrounding a chamber, a first end member mounted on the first end of the body, said first end member having an inlet passage open to the chamber;
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25. A pump for moving a fluid comprising:
- housing means including a body having an inside wall surrounding a chamber, first end means having inlet passage means open to the chamber, and second end means having outlet passage means open to the chamber;
first one-way valving means located in the inlet passage means to allow forward flow of fluid through the inlet passage means into the chamber and restrict reverse flow of fluid through the inlet passage means out of the chamber, means movably mounting the first one-way valving means on said first end means;
piston means located in the chamber movable in a forward direction to move fluid out of the chamber through the outlet passage means and allow fluid to flow into the chamber through the inlet passage means, said piston means being movable in a reverse direction toward the first one-way valving means, said piston means including a magnetic means and passage means allowing the fluid to flow through the piston means during movement thereof in said reverse direction;
longitudinal rib means between said inside wall and piston means allowing limited flow of fluid between the piston means and said inside wall during movement of the piston means in said chamber;
second one-way valving means movably mounted on the piston means allowing fluid to flow through the passage means in the piston means on reverse movement of the piston means and restricting flow of fluid through the passage means in the piston means on movement of the piston means in the forward direction;
means movably mounting the second one-way valving means on the piston means and solenoid means associated with the housing means operable to sequentially move the piston means in the forward and reverse directions. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
- housing means including a body having an inside wall surrounding a chamber, first end means having inlet passage means open to the chamber, and second end means having outlet passage means open to the chamber;
Specification