Patents by Assignee Eddy Pump Corporation

Patent number: 5893703
Abstract: For a pump that produces a negative pressure in a pump casing, a shaft seal system comprises a positive flow of air into the seal system to flow about shaft seals to counteract the negative pressure otherwise being communicated thereto from within the pump casing. The seals engage the rotating shaft and a lubrication passageway supplies lubricant to the shaft seals engaging the rotating shaft, which is driving the rotor. Preferably, no air flows through the seal system when the rotor shaft is stationary and a small air flow, e.g., 0.3 c.f.m. to 1 c.f.m., flows through the shaft seal when the shaft is rotating. This flow rate is preferably monitored.
Type: Grant
Filed: August 23, 1996
Issued: April 13, 1999
Assignee: Eddy Pump Corporation
Inventor: Harry Peter Weinrib
Patent number: 4914841
Abstract: An apparatus for dredging using a pump which forms a highly pressurized, rotating stream of liquid which is directed down the inlet conduit to a discharge and the momentum and energy of the rotating stream is transferred to the solids and liquids, suspending the solids to agitate and separate the same to make the solids more easily suspended. The agitated solids and liquids flow upwardly in a counter-flowing outer annular stream around the downward flowing, rotating stream. The pump is very lightweight as compared to conventional centrifugal dredging pumps and is operated at high speeds, for examble 1,000-2,000 rpm to eliminate the usual speed reducers to prevent cavitation when using the centrifugal pumps.
Type: Grant
Filed: December 24, 1986
Issued: April 10, 1990
Assignee: Eddy Pump Corporation
Inventor: Harry P. Weinrib
Patent number: 4815929
Abstract: A method and apparatus for pumping liquid includes a pump casing with a vortex generating member which generates a swirling column of liquid which swirls about a central axis and which is directed through the pump inlet to discharge into the ambient body of liquid at which its energy is quickly dissipated. The surrounding ambient liquid is drawn through the pump inlet in a counterflow to the vortex column flow and flows into the pump casing and then out through a pump discharge. The preferred vortex generating member has channels of decreasing size converging toward the axis of the vortex column with the streams of liquid increasing their respective velocities as they flow toward the axis at which the streams join and concentrate their energies to form the vortex column. Preferably, the vortex member is drive by a power source.
Type: Grant
Filed: June 23, 1986
Issued: March 28, 1989
Assignee: Eddy Pump Corporation
Inventor: Harry P. Weinrib
Patent number: 4792275
Abstract: A pump is provided within a vortex generator having a plurality of equally spaced blades which rotate in a pump casing to form a nucleus of fluid in the shape of an ellipsoid having an upper tapered end and a lower tapered end with a thicker central section at the blades. Fluid flows in a synchronized flow from the lowered tapered end of the nucleus in a rotating vortex column of fluid which initially flows out of the pump inlet to swirl the ambient fluid about the inlet and causes a low pressure area and a swirling of the ambient fluid to flow inwardly through the pump inlet in a direction counter to the vortex column flow. A belt of fluid rotates between the nucleus and the pump casing. The blades are curved to retain fluid in the nucleus and momentum energy is cumulatively applied to keep the swirling column of fluid swirling through the pump outlet. A tapered section on the pump between the pump inlet and pump outlet assists in flow therebetween.
Type: Grant
Filed: December 24, 1986
Issued: December 20, 1988
Assignee: Eddy Pump Corporation
Inventor: Harry P. Weinrib
Patent number: 4776753
Abstract: A method and apparatus for pumping liquid includes a pump casing with a vortex generating member which generates a swirling column of liquid which swirls about a central axis and which is directed through the pump inlet to discharge into the ambient body of liquid at which its energy is quickly dissipated. The surrounding ambient liquid is drawn through the pump inlet in a counterflow to the vortex column flow and flows into the pump casing and then out through a pump discharge. The preferred vortex generating member was channels of decreasing size converging toward the axis of the vortex column with the streams of liquid increasing their respective velocities as they flow toward the axis at which the streams join and concentrate their energies to form the vortex column. Preferably, the vortex member is driven by a power source.
Type: Grant
Filed: October 28, 1986
Issued: October 11, 1988
Assignee: Eddy Pump Corporation
Inventor: Harry P. Weinrib
Patent number: 4596511
Abstract: A method and apparatus for pumping liquid includes a pump casing with a vortex generating member which generates a swirling column of liquid which swirls about a central axis and which is directed through the pump inlet to discharge into the ambient body of liquid at which its energy is quickly dissipated. The surrounding ambient liquid is drawn through the pump inlet in a counterflow to the vortex column flow and flows into the pump casing and then out through a pump discharge. The preferred vortex generating member has channels of decreasing size converging toward the axis of the vortex column with the streams of liquid increasing their respective velocities as they flow toward the axis at which the streams join and concentrate their energies to form the vortex column. Preferably, the vortex member is driven by a power source.
Type: Grant
Filed: June 5, 1984
Issued: June 24, 1986
Assignee: Eddy Pump Corporation
Inventor: Harry P. Weinrib