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US 5,484,268 AGranted
Positive displacement centrifugal pump
AssigneeImpact MST Incorporated
InventorRobert P. Swank
Life of this patent
Estimating the term…
Abstract
A positive displacement centrifugal pump comprises (a) a pressure generating mass rotatable about a first axis and radially movable relative to it upon rotation of the mass, (b) a pumping unit, and (c) a flexible, non-elastic tensioning element operatively connected to the mass and operable in the course of rotation of the mass to cause the mass to move radially inwardly toward the axis so as to effect intake and/or exhaust of fluid within the pump.
Claims32
A positive displacement centrifugal pump apparatus for pumping fluid, comprising:
- a pressure generating mass, said mass being rotatable and radially movable relative to a first axis;
- a pumping unit having intake and exhaust means for intaking and exhausting fluid;
- tensioning means including a flexible, non-elastic tensioning element operatively connected to said mass;
- rotating means for effecting rotation of said mass relative to said first axis such that centrifugal force acting on said mass in the course of rotation and without the application of any other force to said mass forces said mass to move radially outwardly away from said first axis and said tensioning means in the course of rotation of said mass is operable to cause said mass to move radially inwardly toward said axis;
- and
- means interconnecting said mass to said pumping unit whereby inward and outward radial movement of said mass relative to said axis effects intake and exhaust of fluid from said pumping unit.
3 more elements
The apparatus of claim. 1 wherein said tensioning element is of finite length.
A positive displacement centrifugal pump apparatus for pumping fluid, comprising:
- a pressure generating mass, said mass being rotatable and radially movable relative to a first axis such that centrifugal force applied to said mass in the course of rotation forces said mass to move radially outwardly away from said first axis;
- a pumping unit having intake and exhaust means for intaking and exhausting fluid;
- means including a flexible, non-elastic tensioning element operatively connected to said mass and operable in the course of rotation of said mass to cause said mass to move radially inwardly toward said axis;
- means interconnecting said mass to said pumping unit whereby inward and outward radial movement of said mass relative to said axis effects intake and exhaust of fluid from said pumping unit;
- and
- said pumping unit remaining stationary as said pressure generating mass is rotated to effect operation of said pumping unit.
3 more elements
A positive displacement centrifugal pump apparatus for pumping fluid, comprising:
- a pressure generating mass, said mass being rotatable and radially movable relative to a first axis such that centrifugal force applied to said mass in the course of rotation forces said mass to move radially outwardly away from said first axis;
- a pumping unit having intake and exhaust means for intaking and exhausting fluid;
- means including a flexible, non-elastic tensioning element operatively connected to said mass and operable in the course of rotation of said mass to cause said mass to move radially inwardly toward said axis;
- means interconnecting said mass to said pumping unit whereby inward and outward radial movement of said mass relative to said axis effects intake and exhaust of fluid from said pumping unit;
- and
- said mass and said pumping unit both being rotatable about a common axis.
3 more elements
A positive displacement centrifugal pump apparatus for pumping fluid, comprising:
- a pressure generating mass, said mass being rotatable and radially movable relative to a first axis such that centrifugal force applied to said mass in the course of rotation forces said mass to move radially outwardly away from said first axis;
- a pumping unit having intake and exhaust means for intaking and exhausting fluid;
- means including a flexible, non-elastic tensioning element operatively connected to said mass and operable in the course of rotation of said mass to cause said mass to move radially inwardly toward said axis;
- means interconnecting said mass to said pumping unit whereby inward and outward radial movement of said mass relative to said axis effects intake and exhaust of fluid from said pumping unit;
- and
- said tensioning element being endless.
3 more elements
A positive displacement centrifugal pump apparatus for pumping fluid, comprising:
- a pressure generating mass, said mass being rotatable and radially movable relative to a first axis such that centrifugal force applied to said mass in the course of rotation forces said mass to move radially outwardly away from said first axis;
- a pumping unit having intake and exhaust means for intaking and exhausting fluid;
- means including a flexible, non-elastic tensioning element operatively connected to said mass and operable in the course of rotation of said mass to cause said mass to move radially inwardly toward said axis;
- means interconnecting said mass to said pumping unit whereby inward and outward radial movement of said mass relative to said axis effects intake and exhaust of fluid from, said pumping unit;
- said pressure generating mass comprising pistons movable within cylinders of said pumping unit;
- and
- said flexible, non-elastic tensioning element being attached at one end to a piston and being attached at the opposite end to a portion of said pumping unit and between said ends passing over a cam surface.
4 more elements
A positive displacement centrifugal pump apparatus for pumping fluid, comprising:
- a pressure generating mass, said mass being rotatable and radially movable relative to a first axis such that centrifugal force applied to said mass in the course of rotation force said means to move radially outwardly away from said first axis;
- a pumping unit having intake and exhaust means for intaking and exhausting fluid;
- means including a flexible, non-elastic tensioning element operatively connected to said mass and operable in the course of rotation of said mass to cause said mass to move radially inwardly toward said axis;
- means interconnecting said mass to said pumping unit whereby inward and outward radial movement of said mass relative to said axis effects intake and exhaust of fluid from said pumping unit;
- and
- said pressure generating mass comprising a plurality of arms pivotally mounted at one end for pivotal movement about pivot axes which are perpendicular to said first axis.
3 more elements
A positive displacement centrifugal pump apparatus for pumping fluid, comprising:
- a pressure generating mass said mass being rotatable and radially movable relative to a first axis such that centrifugal force applied to said mass in the course of rotation forces said mass to move radially outwardly away from said first axis;
- pumping unit having intake and exhaust means for intaking and exhausting fluid;
- means including a flexible, non-elastic tensioning element operatively connected to said mass and operable in the course of rotation of said mass to cause said mass to move radially inwardly toward said axis;
- means interconnecting said mass to said pumping unit whereby inward and outward radial movement of said mass relative to said axis effects intake and exhaust of fluid from said pumping unit;
- and
- said means interconnecting said mass and said pumping unit comprising a plurality of rocker arms, each of said rocker arms having opposed ends and being supported intermediate of its ends for oscillatory movement.
3 more elements
A positive displacement pump apparatus for pumping fluid, comprising:
- a first means rotatable about a first axis, a second means radially movable outwardly away from said first axis solely in response to centrifugal force acting upon one of said first and second means upon rotation of said first means;
- a pumping unit having intake and exhaust means for intaking and exhausting fluid;
- means including a flexible, non-elastic tensioning element operatively connected to said second means and operable in the course of rotation of said first means to permit said second means to move radially outwardly and to cause said second means to move radially inwardly relative to said axis;
- and
- means interconnecting said second means to said pumping unit whereby inward and outward radial movement of said second means relative to said axis effects intake and exhaust of fluid from said pumping unit.
2 more elements
A positive displacement pump apparatus for pumping fluid, comprising:
- first means rotatable about a first axis, a second means radially movable relative to said first axis in response to rotation of said first means;
- a pumping unit having intake and exhaust means for intaking and exhausting fluid;
- means including a flexible, non-elastic tensioning element operatively connected to said second means and operable in the course of rotation of said first means to permit said second means to move radially outwardly and to cause said second means to move radially inwardly relative to said axis;
- means interconnecting said second means to said pumping unit whereby inward and outward radial movement of said second means relating to said axis effects intake and exhaust of fluid from said pumping unit;
- and
- said first means comprising a pair of rollers.
3 more elements
A positive displacement pump apparatus for pumping fluid, comprising:
- a first means rotatable about a first axis, a second means radially movable relative to said first axis in response to rotation of said first means;
- a pumping unit having intake and exhaust means for intaking and exhausting fluid;
- means including a flexible, non-elastic tensioning element operatively connected to said second means and operable in the course of rotation of said first means to permit said second means to move radially outwardly and to cause said second means to move radially inwardly relative to said axis;
- means interconnecting said second means to said pumping unit whereby inward and outward radial movement of said second means relative to said axis effects intake and exhaust of fluid from said pumping unit;
- and
- said pumping unit remaining stationary as said first means is rotated to effect operation of said pumping unit.
3 more elements
Dependencies are inferred from the claim text.