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| Number | Title | Issue Date |
| 7407022 | Apparatus for pumping drill cuttings and dual cylinder positive displacement pump for moving drill cuttings and method of use A dual cylinder positive displacement pump is used to move drill cuttings. The pump may include one or more of a self-sealing wear ring member/wear plate member interface, stainless steel pumping cylinders, and a hopper with an inclined surface. ... | 08/05/2008 |
| 7326028 | High flow/dual inducer/high efficiency impeller for liquid applications including molten metal A centrifugal pump has a pump base with inlet inducer openings that receive molten metal into an impeller chamber. An impeller structure in the impeller chamber passes the metal in a radial direction through an outlet inducer opening into a volute passage for discha... | 02/05/2008 |
| 7322802 | Thick matter pump comprising a conveyance capacity control system A thick matter pump comprising a drive motor (50), a (reversible) hydraulic pump (6), and two hydraulic cylinders (5, 5′) coupled to conveyor cylinders (7, 7′) for conveying the thick matter. A regulator regulates the rotational speed... | 01/29/2008 |
| 7226274 | Cement slab leveling apparatus A concrete slab leveling apparatus is provided that is built upon a vehicle such as a flatbed truck or trailer which makes it highly transportable enabling the invention to move from site to site quickly and easily. The flatbed platform of the vehicle is equipped wi... | 06/05/2007 |
| 7131820 | Method for controlling a thick matter pump A method for controlling a thick matter pump comprising two delivery cylinders (10) emerging, via two openings (12), into a material reservoir (14), associated with two delivery pistons (26), symmetrically synchronized relative to said cy... | 11/07/2006 |
| 7118349 | High pressure slurry piston pump A high pressure slurry pump is described which automatically provides a clean fluid buffer around the intake and exhaust valves of the pump and in front of the pump piston in order to displace erosive slurry material and thus extend the life of the pump and improve ... | 10/10/2006 |
| 7097569 | Restorable sand or pellet pile device A restorable sand or pellet pile is provided for use as an amusement or exercise device. A sand or pellet collection chamber has inclined side walls that converge toward each other in a downward direction and having a bottom surface connected to the side walls. A su... | 08/29/2006 |
| 6986303 | Displacement shift valve and pumping apparatus and methods using such a valve Apparatus and methods are provided for pumping concrete using a pumping apparatus including first and second drive cylinders, a valve, and a pump. Fluid is delivered into the cylinders from the pump to reciprocate pistons within the cylinders. Pressure within the cy... | 01/17/2006 |
| 6857861 | Ring for concrete pump A pivot pipe for a two-cylinder thick material sludge pump is designed to reduce the rate of wear of the sealing surfaces and flow bores of the pivot pipe and cooperating outlets on the two pump cylinders. As the pivot pipe oscillates from one pump cylinder to the o... | 02/22/2005 |
| 6827820 | Degassing centrifugal apparatus, process for pumping and degassing a fluid and process for producing paper or board The invention relates to a degassing centrifugal apparatus such as a pump and to a process for pumping and degassing a fluid. The apparatus has a rotatable hollow rotor connected to a stationary fluid inlet at one end and a stationary liquid outlet at the opposite e... | 12/07/2004 |
| 6821097 | Concrete pump with S-tube valve assembly with wear ring-spring-retainer ring construction A concrete pump includes a hopper having a plate with a pair of openings and an S-tube valve assembly which is movable between the two openings. The valve assembly includes an S-tube which is connected to a mounting plate which is pivotally mounted on the hopper. A ... | 11/23/2004 |
| 6779983 | Sludge pump with management system A viscous material (sludge) pump, a method of accurately estimating output of such a pump and a method of efficiently managing such a pump. The pump can be the single or double cylinder variety. The pump is calibrated to determine a calibrated sludge-weight output o... | 08/24/2004 |
| 6776558 | Method and arrangement for concreting vertical shafts A method and an arrangement for concretizing vertical shafts having a depth of e.g. 500 m or more. The concrete is conveyed to a low-lying application site (20) in the shaft by a concrete column that is situated in a downpipe (30). Delivery of concrete... | 08/17/2004 |
| 6733247 | Pumping device for viscous slurry material A device for pumping a viscous slurry material. In one aspect, the pumping device is dimensioned to be insertable into the space between the side jambs of a standard building doorway. The pumping device is self-propelled and a mixer is removably attachable to the de... | 05/11/2004 |
| 6712238 | Drywall taping and texture system using bladder pump with pneumatic flip/flop logic remote control A drywall tape and texture system for pumping fluid material from a container to a work surface includes a pump housing, a compressed air supply, a plurality of air release mechanisms, and an inflatable bladder mounted within the pump housing and held between upper ... | 03/30/2004 |
| 6609898 | Process and device for pumping compressible materials with reduced pressure pulsation A hydraulic system for a reciprocating piston pump that includes an accumulator for producing a steady-pressure supply of compressible material to a distribution nozzle. The hydraulic system includes an adjustable means for constricting the flow of hydrau... | 08/26/2003 |
| 6568925 | Abrasive liquid pump apparatus and method An abrasive liquid pump having a pump housing and a piston component configured for slidable movement within the pump housing. The pump housing has a bottom housing portion with a bottom end and a bottom mid-pump end and a top housing portion with a top e... | 05/27/2003 |
| 6530750 | Control for progressive cavity pump A progressive cavity pumping system includes a pump housing, a rotor member operatively received in the pump housing, a prime mover coupled to the rotor member for driving the rotor member in first and second directions and a controlling means for actuati... | 03/11/2003 |
| 6511302 | Slurry piston pump with cylinder cleaning apparatus A slurry piston pump (10) including a fluid hose (70) coupled into the back end (26) of a piston cylinder (24) to provide cleaning and/or lubricating fluid (60) into the interior (23) of cylinder (24) while allowing cylinder (24) to be directly coupled to... | 01/28/2003 |
| 6488477 | Material feed container, especially for thick material pumps A material feed container (20), especially for thick material pumps, comprising a lower container component (38) that is upwardly open and a motor-driven agitator (44) that extends through the lower container component (38) in-between two side walls (50).... | 12/03/2002 |
| 6450779 | Two-cylinder thick matter pump A two-cylinder thick-matter pump for continuous delivery of thick matter is characterized in that a reversing valve (5) has a diverter housing (8, 8') with at least four openings (a-b), the diverter (6, 6') disposed in the diverter housing (8, 8') is swiv... | 09/17/2002 |
| 6443718 | Shuttle valve for concrete pump A shuttle valve for use in a pumping apparatus for pumping concrete or the like. The valve uses belleville springs to hold a wear ring against the concrete hopper, thereby creating a seal.... | 09/03/2002 |
| 6422840 | Hydraulic displacement pump having two stroke length A pump having both a short stroke pumping mode and a long stroke pumping mode. The pump has two material cylinders, each with an attached hydraulic cylinder for operating a piston rod extending through both the material and hydraulic cylinders. The piston... | 07/23/2002 |
| 6398525 | Monolithic rotor and rigid coupling A device for pumping molten metal that eliminates rotor bearing members comprises a pump having a pump chamber including a first bearing surface, and a monolithic rotor having a second bearing surface that aligns with the first bearing surface. The second... | 06/04/2002 |
| 6382922 | Grout pumps, control boxes and applicator tools, and methods for using the same A grout slurry pumping system, and a grout slurry control box and associated tools are described. Methods of using the pumping system and control box are also described. The pumping system and control box may be used separately or together. The pumping sy... | 05/07/2002 |
| 6375432 | Pipeline air pocket detection system A method of detecting an air pocket in a concrete pump and minimizing the effect of the nozzle and boom reaction as the air pocket reaches the end of the boom. The hydraulic pressure of the pump is monitored to determine when a pump stroke contains air. U... | 04/23/2002 |
| 6305916 | Concrete pump with pivotable hopper assembly The hopper of a concrete pump is pivotally mounted on the frame of the pump so that the hopper can be swung away from the pumping cylinders in order to clean the S-valve in the hopper. O-rings on the frame surround the pumping cylinders and sealingly enga... | 10/23/2001 |
| 6299686 | Drywall taping and texture system using pump A drywall taping and texture system for pumping drywall mastic material from a container filled with the drywall mastic material to a work surface includes a pump housing, an air compressor, a tool for applying the drywall mastic material to the work surf... | 10/09/2001 |
| 6267571 | Hydraulic displacement pump having two stroke length A pump having both a short stroke pumping mode and a long stroke pumping mode. The pump has two material cylinders, each with an attached hydraulic cylinder for operating a piston rod extending through both the material and hydraulic cylinders. The piston... | 07/31/2001 |
| 6220834 | Support pipe for concrete pump with pivoting valve The invention relates to a sliding device for two-cylinder pumps for liquids, especially designed for concrete pumps. The sliding device (20) has a pivot pipe (16) which is bent and has substantially a C-shape. The pivot pipe is fixedly connected, at its ... | 04/24/2001 |
| 6183216 | Arrangement for long-distance conveying of thick matter The invention concerns an arrangement for conveying thick matter, in particular liquid concrete. The arrangement comprises a pump (12) which is to be charged on the input side with thick matter to be conveyed, and a distributor (10) which can be connected... | 02/06/2001 |
| 6168397 | Flexible tube of squeeze pump A squeeze type pump that transfers slurry via an elastic tube by squeezing the elastic tube with pairs of rollers to elastically deform the tube by moving each pair of squeezing rollers. The elastic tube has an outer diameter, an inner diameter, and a thi... | 01/02/2001 |
| 6129520 | Mobile pumping station A mobile pumping station includes a mobile base frame designed to be moved across the ground and a slurry vessel mounted on the mobile base frame and connected to a liquid supply. A primary feed hopper also mounted on the mobile base frame receives a mine... | 10/10/2000 |
| 6116865 | Water box for a thick matter piston pump having two sides of access The invention relates to a piston pump for thick matter such as concrete, sewage sludge, excavated tunnel material and similar. The inventive piston pump has at least one hydraulically operated pump cylinder (10, 12). The pump piston (30) of said pump cyl... | 09/12/2000 |
| 6079130 | Portable gold mining dredge A portable gold mining dredge for use in collecting potentially gold containing aggregate from streambeds for subsequent classification and separation. The dredge has a receptacle, comprised of a drum with a water-tight lid, for receiving the aqueous dred... | 06/27/2000 |
| 5997633 | Composition for and method of pumping concrete A composition for and a method of promoting the flow of a concrete slurry through a pump and a conduit is provided. The composition is a dry particulate mixture comprised of a water soluble, inorganic material and a solvatable, organic polymer. The compos... | 12/07/1999 |
| 5954486 | Squeeze pump having shrink fitter rollers A squeeze type pump, which transfers slurry via an elastic tube by squeezing the elastic tube with pairs of rollers to elastically deform the tube while moving each pair of squeezing rollers. The squeeze type pump includes a cylindrical drum with the elas... | 09/21/1999 |
| 5954484 | Sewage lifting station A sewage lifting station having at least two solid waste collection chambers for receiving pumped solid waste-contaminated sewage. The station has a collection tank for receiving pre-treated waste water flowing from the solid waste collection chambers via... | 09/21/1999 |
| 5865606 | Slurry supplying mechanism A mechanism for pumping slurry includes a housing for receiving the slurry and two cylinders secured to the housing for drawing the slurry into and out of cylinders. A pipe is pivotally secured to the housing and has one end for selectively aligning with ... | 02/02/1999 |
| 5839883 | System and method for controlling a materials handling system A system and method is provided for controlling a materials handling system. The materials handling system preferably includes a feed system, a positive displacement pump and a disposal system. The feed system includes a material feeder, which in the pref... | 11/24/1998 |
