Dual piston pump with magnetically actuated pistons
First Claim
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1. A hydraulic pump comprising, in combination:
- a tube, a pair of pistons comprising an upstream piston and a downstream piston, both of said pistons being formed of magnetic material and freely slidably disposed within said tube, connector means connected to said downstream piston and extending through an aperture in said upstream piston, magnetic means for selectively generating magnetic flux to urge said pistons together, each of said pistons having valve means for supporting the fluid flow in one direction through said tube, and first spring means disposed within the tube and connected said connector means for urging said downstream piston toward a downstream direction of said flow, and second spring means between said pistons for urging them apart.
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Abstract
A hydraulic pump has a magnetic tube and two floating pistons within the tube, adapted to be moved in an axial direction within the tube as a result of magnetic flux generated by an electric coil surrounding the tube. Each piston has a valve for allowing fluid flow in one direction through the tube, and spring means acts on the pistons to control their positions. The arrangement allows operation with reduced vibration and pressure fluctuation, less heat and impact during dry running operation, and less heat and impact during high pressure shut-off.
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Citations
10 Claims
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1. A hydraulic pump comprising, in combination:
a tube, a pair of pistons comprising an upstream piston and a downstream piston, both of said pistons being formed of magnetic material and freely slidably disposed within said tube, connector means connected to said downstream piston and extending through an aperture in said upstream piston, magnetic means for selectively generating magnetic flux to urge said pistons together, each of said pistons having valve means for supporting the fluid flow in one direction through said tube, and first spring means disposed within the tube and connected said connector means for urging said downstream piston toward a downstream direction of said flow, and second spring means between said pistons for urging them apart. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
Specification