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| Number | Title | Issue Date |
| 6613154 | Well cleaning apparatus and method for its use An apparatus for cleaning a well casing and a method for its use. The apparatus includes: a coupling having first and second ends, the first end constructed and arranged for connection to a drill stem of a drilling rig having vertical and rotational motio... | 09/02/2003 |
| 6126392 | Integral pump/orifice plate for improved flow measurement in a centrifugal pump An improved centrifugal pump having an integral pump/orifice plate located at either the pump discharge nozzle or suction nozzle for improved fluid flow measurements through the pump casing, and a process for measuring fluid flow through such a centrifuga... | 10/03/2000 |
| 6048168 | Lubricated ceramic/hybrid anti-friction bearing centrifugal pump A pump assembly for conventionally driven centrifugal pumps having a rolling element comprised of product lubricated ceramic or hybrid anti-friction bearings. The ceramic bearings are comprised of ceramic balls and ceramic races, whereas the hybrid bearin... | 04/11/2000 |
| 5923111 | Modular permanent-magnet electric motor A modular permanent-magnet electric motor assembly having a predetermined maximum power output for a submersible pump assembly, a stator having a plurality of electric coils adapted to be energized to create a magnetic field, and a rotor assembly disposed... | 07/13/1999 |
| 5915921 | Wearing ring for volute pump A volute pump having a suction volute, a discharge volute and an impeller. The volute pump further comprises a wearing ring seated between the interior walls of the suction volute and the impeller. The wearing ring has an accurate extended portion which e... | 06/29/1999 |
| 5605442 | Centrifugal pump for pumping fiber suspensions A centrifugal pump of the type adapted to pump high consistency fiber suspensions includes impeller vanes having portions which are immediately adjacent the fiber suspension in the interior of a vessel from which the suspension is to be pumped. The pump a... | 02/25/1997 |
| 5413460 | Centrifugal pump for pumping fiber suspensions A centrifugal pump of the type adapted to pump high consistency fiber suspensions includes impeller vanes having portions which are immediately adjacent the fiber suspension in the interior of a vessel from which the suspension is to be pumped. The pump a... | 05/09/1995 |
| 5379519 | Method for removal of a bearing frame assembly A method for attachment to an overhead crane for removing the bearing assembly from a vertical centrifugal pump system without removing the motor. The apparatus includes a rigid C-shaped frame which is attached by a pulley to an overhead crane and also in... | 01/10/1995 |
| 5354076 | Chuck draw rod connector An assembly for releasably connecting the machine draw rod to a chuck draw rod both of which rotate about an axis, the assembly including a female member having a first end operatively attached to the machine draw rod member and defining a receptacle, the... | 10/11/1994 |
| 5346361 | Air seal for pump with vertical shaft A sealing assembly to seal about a rotary shaft of a vertical pump assembly, the pump assembly including an impeller rotating within a cavity to pressurize a fluid entering the cavity, the sealing assembly including a pump housing and a gas filled enclose... | 09/13/1994 |
| 5344163 | Dynamic shaft seal for pumping fibrous slurries A dynamic shaft seal for a fluid handling apparatus for pumping fibrous slurries, the fluid handling apparatus comprising an impeller mounted on a rotating shaft disposed in a pump housing, the shaft extending through an aperture extending from the pump h... | 09/06/1994 |
| 5336048 | Fluid directing device for seal chamber A flow directing device is provided for a fluid filled seal chamber for a centrifugal fluid pump, wherein the pump includes a seal chamber housing, a rotary shaft extending through the housing, an impeller mounted on one end of the shaft, and a rotary sea... | 08/09/1994 |
| 5287612 | Apparatus for removal of a bearing frame assembly An apparatus for attachment to an overhead crane for removing the bearing assembly from a vertical centrifugal pump system without removing the motor. The apparatus includes a rigid C-shaped frame which is attached by a pulley to an overhead crane and als... | 02/22/1994 |
| 5129264 | Centrifugal pump with flow measurement An improved pump casing and process for measuring fluid flow through a centrifugal pump casing is disclosed wherein the static pressure of a fluid being pumped by said pump is measured at a first point in the pump discharge inlet area of the pump adjacent... | 07/14/1992 |
| 5087171 | Paper pulp centrifugal pump with gas separation The invention relates to a centrifugal pump particularly adapted for pumping fibrous suspensions from within a reservoir, wherein the pump includes a rotor arranged wholly within the reservoir for cooperation with the bottom wall thereof to effect fluidiz... | 02/11/1992 |
| 4936744 | Centrifugal pump The invention relates to a centrifugal pump of the type adapted for use in pumping multiple phase liquids, i.e. liquids having entrained gas and liquids having both entrained gas and solids. The pump includes means for effecting an initial separation of g... | 06/26/1990 |
| 4789301 | Low specific speed pump casing construction An improved low specific speed pump is disclosed, which provides for greater consistency of pump operating efficiencies obtainable by pumps of any given group of like size pumps. In the present pump, the internal dimensions of the pump chamber and dischar... | 12/06/1988 |
| 4661044 | Pump having a bushing removal mechanism A mechanism is disclosed for use in permitting inspection and/or replacement of a seal chamber bushing of a centrifugal or axial flow pump at a point of pump installation and without necessitating disassembly of the pump rotating assembly. The mechanism i... | 04/28/1987 |
| 4613281 | Hydrodynamic seal A fluid pump is provided with a casing having a pumping chamber, an impeller arranged within the pumping chamber, a vortex chamber arranged to open inwardly of the pumping chamber and a repeller carried by the impeller and arranged to extend into the vort... | 09/23/1986 |
