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US 6,224,347 B1Granted
Low volume, high precision, positive displacement pump
AssigneeThe Gorman-Rupp Company
InventorsGeorge A. Clark, Robert J. Hayes
Life of this patent
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AssigneeThe Gorman-Rupp Company
InventorsGeorge A. Clark, Robert J. Hayes
Estimating the term…
A pump (10) includes a motor (11) which rotates a pumping assembly (52) which includes a face plate (54) and a cylinder (56). A piston (67) reciprocates in the cylinder (56) to draw fluid into the cylinder (56) from an intake groove (78) and an intake port (76) formed in a manifold plate (73) positioned adjacent to the face plate (54), and to thereafter discharge that fluid to a discharge groove (80) and a discharge port (77) formed in the manifold plate (73). The piston (67) rides on a swash plate (49) as the face plate (54) rotates, and the extent of reciprocation of the piston (67) and therefore the amount of fluid to be dispersed on each reciprocation of the piston (67) is controlled by an adjuster wheel (40) which can be moved to allow the swash plate (49) to pivot a predetermined extent. As such, the pump (10) can dispense a known precise amount of fluid on each reciprocation of the piston (67).
A fluid pump comprising a rotating cylinder, a flat face plate associated with said cylinder, a piston capable of reciprocating in said cylinder, a flat seal plate positioned adjacent to said face plate, a fluid intake port in said seal plate, an intake groove in said seal plate communicating with said intake port, a fluid discharge port in said seal plate, a discharge groove in said seal plate communicating with said discharge port, and means to maintain said face plate against said seal plate to provide the only seal around said grooves and said ports, said grooves and said ports communicating with said cylinder such that upon rotation of said cylinder relative to said seal plate and upon reciprocation of said piston, said piston sequentially draws fluid from said intake groove and said intake port into said cylinder and then discharges that fluid from said cylinder into said discharge groove and through said discharge port.
A fluid pump comprising a motor;
A fluid pump comprising a stationary plate having a fluid intake area and a fluid discharge area, a second flat plate, means to maintain said second plate against said stationary plate to provide a seal around said fluid intake area and said fluid discharge area, means to rotate said second plate, a cylinder associated with said second plate and selectively communicating with said fluid intake area and said fluid discharge area, a piston in said cylinder, and means to reciprocate said piston in said cylinder to selectively draw fluid from said intake area into said cylinder and discharge that fluid from said cylinder into said discharge area.
Dependencies are inferred from the claim text.