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| Number | Title | Issue Date |
| 7713033 | Double-acting, duplex pump controlled by two, two position spool valves The present invention provides a fluid control system and associated methods. The fluid control system includes a source of a pressurized fluid and a first spool valve having at least two positions, wherein the first spool valve is connected in fluid communication w... | 05/11/2010 |
| 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 |
| 6957567 | Method and system for the controlled application of fluid pressure to a load, especially for pressure testing pipe A method and system for the controlled application of fluid pressure of a load, such as a large pipe to be pressure tested utilized small pressure converters which are operated by a common controller at the hydraulic side to fill and pressurize the pipe. One pressur... | 10/25/2005 |
| 6592334 | Hydraulic multiphase pump The present invention provides a hydraulically driven multiphase pump system and methods for pumping a fluidstream from the surface of a well. The hydraulically driven multiphase pump system consists of two vertically disposed plungers. The plungers are h... | 07/15/2003 |
| 5655896 | Apparatus for dispensing conductive coating materials having multiple flow paths An apparatus is provided for transferring electrically conductive coating materials, such as water-based paint, from a source to at least one coating dispenser such as a spray gun for discharge onto a substrate. In alternative embodiments, the coating mat... | 08/12/1997 |
| 5634779 | Hydraulic fluid-driven, multicylinder, modular reciprocating piston pump A hydraulic fluid-driven, multicylinder, modular, reciprocating piston pumping machine of non pulsating flow and independently variable forward and return stroke speeds comprises several pumping modules (A, B . . . E) each having one primary cylinder (A1,... | 06/03/1997 |
| 5616005 | Fluid driven recipricating apparatus An apparatus comprising a pair of fluid driven pump assemblies in a back-to-back configuration to yield a bi-directional pump. Each of the pump assemblies includes a piston or diaphragm which divides a chamber therein to define a power section and a pumpi... | 04/01/1997 |
| 5252037 | Piston valved vertical pump for particulate materials A piston pump for conveying fragile particulate food products without damaging the product. The pump includes a filler and a discharge conduit containing piston valves actuated by hydraulic cylinders. The pumping chamber in which the product is compressed... | 10/12/1993 |
| 5092522 | Automated accurate mix application system for fiber reinforced structures Processes and apparatus for the construction of improved tank structures employing a pump metering and delivery system which accurately meters, mixes and evenly applies composite materials to form the walls of tanks or containment vessels. Such systems ha... | 03/03/1992 |
| 4924671 | Controlled series high-pressure intensifiers for hydraulic press cylinded circuit For the production and exact control and regulation of very high pressures, in particular for actuating a press, two pressure intensifiers are provided which each have a differential piston. The second pressure intensifier is connected via a shutoff valve... | 05/15/1990 |
| 4884747 | Ripple-free flow, accurate mix, and automated spray system An apparatus for the construction of improved tank structures employing a pump metering and delivery system which accurately meters, mixes and evenly sprays composite materials to form the walls of tanks or containment vessels. Such systems have specific ... | 12/05/1989 |
| 4633699 | Continuous extrusion apparatus Continuous extrusion apparatus for continuously deforming an elongated workpiece of indefinite length (e.g. rod) to produce an elongated product of indefinite length (e.g. wire) is disclosed wherein the improvement includes combination of structure for ma... | 01/06/1987 |
| 4555220 | Regeneration system for a hydraulic intensifier unit A hydraulic intensifier for oil well fracturing and/or erosion drilling, having a pair of intensifier units including a pair of sequentially operated reciprocating ram assemblies powered by hydraulic cylinder motors which are operated to maintain a substa... | 11/26/1985 |
| 4543044 | Constant-flow-rate dual-unit pump A dual-unit pump, e.g., a rolling diaphragm piston pump, suitable for pumping an abrasive high-viscosity slurry, is adapted to operate at a constant flow rate by means for detecting and correcting a pressure differential in the two units before the units ... | 09/24/1985 |
| 4527954 | Pumping apparatus A multiple-mode, multiplex pumping apparatus includes circuit control elements for initializing the apparatus by placing each of the pistons and plungers in each pumping section of the multiplex pumping apparatus at a respective initial starting point. Th... | 07/09/1985 |
| 4490096 | Pump system for liquid/solid materials with balanced output A pump system, particularly suitable for pumping wet mixes and slurries, achieves an output of pumped material substantially free from pulsations or fluctuations by control movement of power pistons (12A,12B) within power cylinders (10A, 10B). The power p... | 12/25/1984 |
| 4470771 | Quadraplex fluid pump A quadraplex pumping unit for use as a mud pump, an intensifier, or as a pump for abrasive fluids or the like includes four rams and four ram operating pistons. A control valve arrangement provides for pressure equalization and energy transfer from a cyli... | 09/11/1984 |
| 4410304 | Free piston pump A pumping system which converts a source of gas under pressure to hydraulic fluid under pressure. The system includes three free floating pistons coupled through control valves to the pressurized gas source on one side and through appropriate check valves... | 10/18/1983 |
| 4319435 | Blasting machine for deburring workpieces A wet blasting machine for permitting deburring of workpieces by utilizing a slurry of water and abrasive particles. The slurry is discharged by a blasting gun against the workpiece, and is then collected within a reclaiming tank. The top water flows from... | 03/16/1982 |
| 4260338 | Multicylinder pump for viscous liquids A multicylinder piston pump for pumping viscous liquids of varying composition with each cylinder having an extendible tubular piston intake valve and discharge valve is disclosed. The extendible tubular piston valves have a tubular piston slidably mounte... | 04/07/1981 |
| 4021156 | High pressure hydraulic system Two hydraulic pressure intensifiers are coupled in parallel between a source of hydraulic fluid at relatively low pressure and an output path. Each intensifier provides a pressurizing stroke in only one direction of linear reciprocation. The intensifiers ... | 05/03/1977 |
| 4011723 | Fluid power system A fluid power system comprising a steam generator connected to a hydraulic pumping device for delivering steam under pressure to the device for driving the same, while steam is returned to the steam generator via a condenser. The hydraulic pumping device ... | 03/15/1977 |
| 3981622 | Hydraulic intensifier control system An intensifier unit includes a pair of sequentially operated reciprocating ram assemblies, each powered by a cylinder motor. Extension of the cylinder rods is accomplished by application of pressurized hydraulic fluid to the pistons. The pistons are retur... | 09/21/1976 |
