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| Number | Title | Issue Date |
| 6089823 | Multi-stage vertical turbine pump with comminution An apparatus for reducing between-stage entanglement of fibrous materials around a rotating impeller drive shaft in a multi-stage vertical turbine pump includes a fluted sleeve on the rotating impeller drive shaft and a notched cutter ring fixed to a stat... | 07/18/2000 |
| 6050277 | Decoking tool carrier with a self-propelled climbing crosshead An apparatus for a decoking system, for raising and lowering a cutting tool into a coking drum, has at least one rigid vertical member extending above the coking drum with a toothed rack extending substantially the full height of the member. A rigid frame... | 04/18/2000 |
| 6024494 | Polymer-backed thrust bearings A product lubricated thrust bearing includes an annular bearing disc made from a hard bearing material such as silicon carbide and having a plurality of radial lubrication grooves in at least one of a front and rear face thereof to define a plurality of b... | 02/15/2000 |
| 6012909 | Centrifugal pump with an axial-field integral motor cooled by working fluid An integral axial-field motor pump, includes a housing assembly having a working fluid inlet, a working fluid discharge, and a stationary shaft mounted therein. A motor stator is mounted in the housing assembly radially surrounding the stationary shaft an... | 01/11/2000 |
| 5993153 | Open bowl for a vertical turbine pump An open bowl for a vertical turbine pump, includes a bowl body having an inner wall and an outer wall, both walls being of substantially constant optimum thickness, surrounding a vertical axis and connected by diffuser vanes which define hydraulically opt... | 11/30/1999 |
| 5964028 | Method for making an encapsulated magnet carrier A method is provided for manufacturing an encapsulated magnet carrier by forming a wax pattern of the magnet carrier with an annular conducting ring annular chamber section, placing the conducting ring over the wax pattern in the annular chamber section, ... | 10/12/1999 |
| 5951267 | Diaphragm for seal-less integral-motor pump A diaphragm system is provided for isolating a motor stator from pumped fluid in a seal-less integral-motor pump, the pump having a non-rotating shaft fixed to a motor housing containing the motor stator, the shaft extending into a pump casing within whic... | 09/14/1999 |
| 5944482 | Front-removable bearing housing for vertical turbine pump A bearing housing in a bowl of a vertical turbine pump for a lower bearing of a rotatable pump shaft on which an impeller is mounted includes a separable hollow substantially cylindrical housing body with upper and lower ends, having a radial flange at it... | 08/31/1999 |
| 5927860 | Buttons for product lubricated thrust bearings A thrust bearing, for axially supporting a rotating member, includes a flat circular disk-shaped bearing body having a central axial bore and a plurality of axial cavities surrounding the central axial bore and a plurality of bearing elements releasably r... | 07/27/1999 |
| 5921750 | Compact interbowl assembly coupler for vertical turbine pumps An interbowl coupler provides for field coupling an upper pump bowl assembly to a lower pump bowl assembly, each bowl assembly having impellers, a rotatable shaft, and a case, to provide a multistage vertical turbine pump for deep well applications. The c... | 07/13/1999 |
| 5871332 | Centrifugal pump A centrifugal pump has a rotating shaft (1) with a centrifugal impeller (3) mounted on it. The shaft (1) and impeller (3) are mounted within a stationary casing (7) and a mechanical seal (8) is provided where the shaft (1) passes out through the casing (7... | 02/16/1999 |
| 5831364 | Encapsulated magnet carrier A magnet carrier includes a single piece integrally cast cage with a cast in place ferrous conducting ring circumferentially extending about a carrier axis where the cast cage has a generally U shape. The magnet carrier includes an annular axially extendi... | 11/03/1998 |
| 5816505 | Fluid jet decoking tool A decoking tool includes a valve body equipped with a pressurized fluid inlet and having a plurality of fluid passages, including drilling fluid passages extending substantially the full length of the valve body to conduct fluid to drilling nozzle sockets... | 10/06/1998 |
| 5788473 | Integral close coupling for a rotary gear pump A coupling for transferring power from a drive shaft to a driven shaft includes a first coupling member, having a substantially cylindrical body, with a cylindrical bore at a first end, longitudinal key arrangement within the bore for being rotatably driv... | 08/04/1998 |
| 5779005 | Constant flow cascade lubrication system A system for lubricating bearings on a vertical rotatable shaft within a bearing housing, is comprised of an annular lower lubricant sump at a lower portion of the bearing housing; an annular upper lubricant reservoir at an upper portion of the bearing ho... | 07/14/1998 |
| 5737221 | Method for dispensing dry granular materials A material dispensing system for agricultural pesticides and chemicals. The system uses distributed processing with a main controller and a plurality of sub-controllers to control pesticide metering devices. The metering devices are attached to a pesticid... | 04/07/1998 |
| 5687782 | Transfer valve for a granular materials dispensing system A transfer valve for permitting fluent particulate materials to flow from a closed transport container, having a bottom wall with an outlet aperture, into a closed base container having a top wall with a sealed inlet aperture adapted for sealed engagement... | 11/18/1997 |
| 5683185 | Journal bearing retainer system with eccentric lock A bearing retainer system includes a hollow cylindrical bearing casing having a casing bore with a first axis for holding a bearing sleeve; an annular outer element rotationally secured to the casing, disposed within the casing bore, and having a circumfe... | 11/04/1997 |
| 5667357 | Bearing and seal percolator for a centrifugal pump A percolator system for providing fluid flow to bearings and seals supporting a shaft, on which is mounted an impeller having pumping vanes, disposed within a housing of a centrifugal pump, during intermittent dry running periods, the pump having a vertic... | 09/16/1997 |
| 5641011 | System for transporting and dispensing granular materials A system for transporting and dispensing fluent materials consists of a shipping container disposed with a supply of fluent material, and having a bottom wall with an outlet aperture, the outlet aperture being occluded by a normally disabled transfer valv... | 06/24/1997 |
| 5638285 | System for dispensing dry agricultural chemicals A material dispensing system for agricultural pesticides and chemicals. The system uses distributed processing with a main controller and a plurality of sub-controllers to control pesticide metering devices. The metering devices are attached to a pesticid... | 06/10/1997 |
| 5605444 | Pump impeller having separate offset inlet vanes A fluid impeller for a centrifugal pump includes a hub having a substantially disk-like form with a center and an edge, circular symmetry, and provision for being rotatably driven. A first plurality of pumping vanes projects substantially perpendicularly ... | 02/25/1997 |
| 5539669 | Power sequencing method for electromechanical dispensing devices A method of controlling the application of power to a plurality of metering devices in a pesticide dispensing system permits operator controlled designation of row numbering, row-specific dispensing quantity of both seed and pesticide, and accurate record... | 07/23/1996 |
| 5524794 | Metering device for granular materials A metering device for controlling the flow of granular material from a container. The metering device includes an electromechanical solenoid connected to a pivoting metering bar. When the solenoid is energized, the metering bar is pivoted away from an out... | 06/11/1996 |
| 5514329 | Cavitation resistant fluid impellers and method for making same A fluid impeller for us in applications requiring superior cavitation erosion resistance. The impeller has a body fabricated from a castable metastable austenitic steel alloy which has a preferred chemical composition in the range of 17.5-18.5% chromium, ... | 05/07/1996 |
| 5456577 | Centrifugal pump with resiliently biasing diffuser A multistage centrifugal pump having a last stage diffuser which acts as a compensator to load the suction and intermediate pressure gaskets during pump operation and pump stand-by. The last stage diffuser is designed as a spring which deflects under vary... | 10/10/1995 |
| 5450987 | Pumping system with failure responsive discharge valve A pumping system including a bulk liquid container having a pump mounted in the container top with a suction tube attached to the pump and extending into the container. A drive motor is drivably attached to the pump. The pumping system includes an automat... | 09/19/1995 |
| 5385445 | Centrifugal pump A multi-stage open impeller centrifugal pump, primarily used for charging service. The pump uses multivane, 27 vanes, impellers, mounted on a single shaft. Rotor parts are a loose fit to the pump shaft and channel rings are pulled together with bolts. Jac... | 01/31/1995 |
| 5366351 | Pump with failure responsive discharge valve An automatic shut-off valve for use with a chemical container and installed pump. The shut-off valve closing in response to an accidental dislodging of the pump motor from the pump.... | 11/22/1994 |
| 5344285 | Centrifugal pump with monolithic diffuser and return vane channel ring member A segmental ring centrifugal pump wherein the channel ring and the diffuser/crossover hydraulics are formed as a single monolithic casting. By casting the diffuser and the channel ring as a unit, the monolithic diffuser channel ring member and the diffuse... | 09/06/1994 |
| 5320489 | Diffuser for a centrifugal pump A radial diffuser for a centrifugal pump. The diffuser has a plurality of diffusing passages wherein the width of the diffusing passage is constant and the cross-sectional area of the diffusing passage increases from the inlet of the diffusing passage to ... | 06/14/1994 |
| 5299813 | Floating seal ring A floating seal ring is disposed within a retainer ring encircling a shaft which extends through the retainer ring. The seal ring is permitted to float radially with respect to the shaft but is retained axially with respect to the shaft. A pin protrudes f... | 04/05/1994 |
| 5297940 | Sealless pump corrosion detector A corrosion detector for use with a sealless centrifugal pump. The corrosion detector having a corrosion coupon at one end of the detector. The corrosion coupon being formed of the same material as the pump containment shell and having a thickness approxi... | 03/29/1994 |
| 5269664 | Magnetically coupled centrifugal pump A single stage end suction centrifugal pump with a close coupled motor radial magnetic drive. The pump is comprised of a pump housing with a pumping chamber and having an inlet and an outlet. A sealing diaphragm is removably mounted to the pumping chamber... | 12/14/1993 |
| 5263825 | Leak contained pump A configuration of pumps is presented which eliminates problems of leakage, particularly leakage from pumps handling toxic or other fluids which might pollute the atmosphere. The leak contained pumps prevent leakage to the environment and/or pump motors u... | 11/23/1993 |
| 5248070 | Volumetric measuring/dispensing device A volumetric measuring/dispensing device for liquids is provided which has a measuring container having graduation markings thereon for measuring the quantity of liquid in the container. The container has an upper valve housing and a lower valve housing m... | 09/28/1993 |
| 5248245 | Magnetically coupled centrifugal pump with improved casting and lubrication A magnetically coupled centrifugal pump comprising a pump housing containing a pumping chamber and having an inlet and an outlet, a shaft mounted in the pump housing for rotation, a pump impeller attached to the forward end of the shaft for rotation with ... | 09/28/1993 |
| 5215448 | Combined boiler feed and condensate pump A boiler feed pump including an elongate casing adapted to be interconnected in a pipeline and a variable speed electrical motor driving an axially extending shaft, which drives a condensate inducer pump and a multiple stage centrifugal pump, all of which... | 06/01/1993 |
| 5192193 | Impeller for centrifugal pumps A cavitation resistant impeller for liquid-conveying centrifugal pumps has a plurality of impeller vanes, each vane having, in combination, a leading inlet edge with a root portion extending upstream of its tip portion; a vane thickness that is greater up... | 03/09/1993 |
| 5186365 | Fitting for emptying a container A fitting for dispensing liquid from a container, including a housing for mounting within an opening of the container, a one-way valve within the housing for allowing liquid to only flow outward from the container, and a first drain hole through the housi... | 02/16/1993 |
