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| Number | Title | Issue Date |
| 8186977 | Pumping system A pumping system for pumping drilling fluid during the driving or sinking of bore holes includes a pump unit, a rotary drive unit configured to drive the pump unit, a gearbox that includes a driving gear and a driven gear, and a pump shaft drive. The rotary drive un... | 05/29/2012 |
| 7927082 | Highly efficient durable fluid pump and method A highly efficient fluid pump and pumping method are disclosed. The pump includes a cylinder, a piston in the cylinder defining a first and second volume in the cylinder, and a motive actuator for driving reciprocatively a rod attached to the piston at a rate of sub... | 04/19/2011 |
| 7559753 | Double disc pump with fixed housing block A double disc pump includes a stationary main pump housing block that can remain fixed to its supporting frame while all other parts of the pump are removed for servicing. This permits disassembly of the pump without disconnecting the inlet or outlet plumbing and is... | 07/14/2009 |
| 7404704 | Manifold assembly for reciprocating pump A cylinder block assembly for a reciprocating pump includes a block body having a piston chamber that receives a piston of the reciprocating pump. The cylinder block assembly has an outlet valve assembly positioned within the block body that is positioned in fluid c... | 07/29/2008 |
| 7318706 | Valving for multi-stage vacuum pumps A multi-stage vacuum pump comprises a first piston in a first cylinder defining a first stage pumping chamber and a second piston in a second cylinder defining a second stage pumping chamber. The pump has a spool valve between the first and second cylinders for cont... | 01/15/2008 |
| 7310965 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 12/25/2007 |
| 7278836 | Metering pump A metering pump that is capable of delivering a constant, rate of fluid over a wide range of viscosities at infinitely variable delivery rates. Two identical pumping chambers are provided with one operating in the suction mode, and the other in the discharge mode wi... | 10/09/2007 |
| 7255049 | Subsurface soil injection method A method for the subsurface application of fertilizers, biologicals, fumigants, non-fumigant pesticides or other chemicals to soil with reduced application rates. Discrete amounts of the materials are injected into the soil at numerous sites along a path during a pa... | 08/14/2007 |
| 7249936 | Dual capacity compressor A dual capacity compressor, which can maintain a fixed eccentricity and stable operation, even when the compressor is rotated in both the regular and reverse directions in order to provide multiple compression capacities, is provided. This dual capacity compressor i... | 07/31/2007 |
| 7217105 | Integrated pump and wash pump A pump apparatus is provided which comprises a first displacement pump and a ceramic valve construction formed of a ceramic rotor, a ceramic stator having flat surfaces which are positioned in sealing relationship and a second displacement pump having check valves. ... | 05/15/2007 |
| 7159412 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 01/09/2007 |
| 7080792 | Liquid pressurizing device A liquid pressuring device comprises a reciprocating pump (1), pressure sensor (23) and pressure control unit (25) which is adapted to control the motion of the plungers (5A, 5B) so as to make an actual delivery pressure value reac... | 07/25/2006 |
| 7074022 | Discharge valve assembly for reciprocating compressors A reciprocating compressor including cylinder block with a plurality of cylinder bores. A piston is positioned in each bore and mounted to move in response to the a crankshaft, causing each piston to reciprocate within the cylinder bore. The compressor further inclu... | 07/11/2006 |
| 7073346 | Compressor head, internal discriminator, external discriminator, manifold design for refrigerant recovery apparatus and vacuum sensor The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 07/11/2006 |
| 6951891 | Process to make dispersions The present invention relates to the production of dispersions and is particularly suitable for making dispersions with a viscous or solid dispersed phase in a continuous phase with a lower viscosity. ... | 10/04/2005 |
| 6821096 | Multiple component metering and dispensing system A plural component pumping apparatus including a piston and cylinder for each component to be pumped. Reciprocation of the piston in the cylinder draws the component into the cylinder during an intake stroke of the pumping apparatus and exhausts the material from th... | 11/23/2004 |
| 6773238 | Pumping device for discharging large amounts of liquid This invention relates to a device for pumping high delivery volumes of a liquid, with at least two pumps each forming a single structural unit, which are jointly hooked up to a pressure line on the delivery side, and coupled to a single drive. The device according ... | 08/10/2004 |
| 6733248 | Fluid pumping apparatus A pump has wobble pistons rigidly connected to arms of a nutating plate that is mounted on a bearing eccentrically mounted to a drive shaft by a counterweight. The piston assembly is nearly perfectly balanced by the counterweight due to its precisely defined moment ... | 05/11/2004 |
| 6622612 | Pump, particularly plunger pump A pump, particularly a plunger pump, comprises a crank mechanism oscillating a plunger in a housing and an elastic sealing device fastened to the plunger. The sealing device provides a pressure-tight sealing with respect to a lower housing space containin... | 09/23/2003 |
| 6623254 | High pressure water pump A high-pressure water pump for supplying high pressure water for atomization in the inlet stream of a gas turbine is disclosed which includes at least one hydraulic cylinder containing a piston secured to a piston rod extending from the hydraulic cylinder... | 09/23/2003 |
| 6558134 | Fluid intensifier pump system An intensifier pump system includes a supply pump for delivering fluid products at an intermediate pressure. The products are delivered to one or more intensifier pumps that take advantage of hydraulic intensification to expel the product at high pressure... | 05/06/2003 |
| 6450777 | Fluid pumping apparatus An axial piston fluid pumping apparatus is disclosed in which wobble pistons are rigidly connected to arms of a nutating plate that is rotatably mounted on a bearing which is mounted on a drive shaft. The axis of the bearing is at an acute angle to the ax... | 09/17/2002 |
| 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 |
| 6368080 | Continuous fluid injection pump A continuous fluid injection pump delivers a constant flow of fluid under variable loads. This pump includes a housing with an inlet, and outlet and a bore, an inlet line between the housing inlet and the bore, an outlet line between the housing outlet an... | 04/09/2002 |
| 6315532 | Dual disc pump A dual disc pump in which the suction disc is phased to lag by more than 180° behind the pressure disc.... | 11/13/2001 |
| 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 |
| 6264442 | High volume positive displacement pump with gear driven rotary valves A positive displacement pump for gases includes a pair of pistons operating out of phase. Each of the pistons is associated with a plurality of rotary inlet valves disposed along the sidewalls of the piston cylinders. A rotary outlet valve is also associa... | 07/24/2001 |
| 6254357 | Fluid pumping apparatus An axial piston fluid pumping apparatus is disclosed in which wobble pistons are rigidly connected to arms of a nutating plate that is rotatably mounted on a bearing which is mounted on a drive shaft. The axis of the bearing is at an acute angle to the ax... | 07/03/2001 |
| 6113368 | Method for supplying liquids by means of a pump combination comprising of two single oscillating displacement pumps, and device for accomplishing the method A method and apparatus for supplying liquids by means of a pump combination comprising two single oscillating displacement pumps is provided, wherein a supply pressure of the pump supplying liquid into a user duct is used as a control value of a pressure ... | 09/05/2000 |
| 6092993 | Adjustable crankpin throw structure having improved throw stabilizing means A stabilizing structure for a throw adjusting eccentric cam in a two-stage reciprocating compressor is provided. The compressor includes a block that has at least one cylinder with an associated compression chamber and piston, a crankshaft that includes a... | 07/25/2000 |
| 6074174 | Fluid pumping apparatus An axial piston fluid pumping apparatus is disclosed in which wobble pistons are rigidly connected to arms of a nutating plate that is rotatably mounted on a bearing which is mounted on a drive shaft. The axis of the bearing is at an acute angle to the ax... | 06/13/2000 |
| 6047902 | Road marking machine with a pump combination driven in proportion with the traveling speed A road marking machine comprising a spray gun and a combination of two displacement pumps for supplying the marking substance to the spray gun, wherein the combination is driven in proportion with the traveling speed and wherein the pumps, each after star... | 04/11/2000 |
| 6017198 | Submersible well pumping system The invention generally concerns a submersible well pumping system comprising an axially elongated housing having a diameter less than the bore hole of the well, a multi-chamber hydraulically driven diaphragm pump, suspended in the well using coiled tubin... | 01/25/2000 |
| 5707212 | Apparatus for precisely controlling the feeding of viscous and non-viscous liquid products into a packaging machine Precise control of the vertical motion of a piston or series of pistons within a cylindrical housing of a positive displacement pumping device to precisely set the discharge volume of viscous and non-viscous liquid products from the pistons. Uses a linear... | 01/13/1998 |
| 5700137 | Low profile positive displacement pump system A low profile positive displacement pump system is disclosed. The pump system includes a gasoline powered engine with a vertically disposed crank shaft. The system also includes a piston pump with at least one horizontally disposed piston, and a pump shaf... | 12/23/1997 |
| 5690478 | Solid material pump A solid material pump comprising a pump housing, a pair of parallel pump cylinders driven by hydraulic cylinders and each connected to a pump chamber, a slurry feed device which communicates via inlet valves with inlet valve chambers each of which communi... | 11/25/1997 |
| 5636975 | Inlet and discharge valve arrangement for a high pressure pump A high-pressure, plunger-type liquid pump including a liquid manifold that includes a plunger chamber in the form of an axial cylindrical bore portion for slidably receiving a pressurizing plunger, and that also includes a valve chamber coaxial with the p... | 06/10/1997 |
| 5593291 | Fluid pumping apparatus A fluid pumping apparatus is disclosed in which wobble pistons are rigidly connected to arms of a swashplate that is rotatably mounted on bearings which are mounted on a drive shaft. The axis of the bearings is at an acute angle to the axis of the shaft. ... | 01/14/1997 |
| 5584672 | Low profile positive displacement pump system A low profile positive displacement pump system is disclosed. The pump system includes a gasoline powered engine with a vertically disposed crank shaft. The system also includes a piston pump with at least one horizontally disposed piston, and a pump shaf... | 12/17/1996 |
| 5556264 | Low profile positive displacement pump system A low profile positive displacement pump system is disclosed. The pump system includes a gasoline powered engine with a vertically disposed crank shaft. The system also includes a piston pump with at least one horizontally disposed piston, and a pump shaf... | 09/17/1996 |
