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| Number | Title | Issue Date |
| 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 |
| 6929454 | Thick matter pump In a thick matter pump, especially for delivering concrete, comprising two delivery cylinders, it is known to provide two position sensors in one of the two cylinders for control of the pistons. However, leakage of hydraulic fluid can lead to an imbalance of the two... | 08/16/2005 |
| 6328542 | Check valve system A check valve system and method control the opening and closure of a check valve that supplies product fluid to an intensifier pump based on the position of a piston within the intensifier pump. Position sensing allows anticipation of different events alo... | 12/11/2001 |
| 6171075 | Process and device for controlling a two-cylinder thick medium pump The invention relates to a sequential control system for two-cylinder thick medium pumps whose delivery cylinders (1, 1') are actuated hydraulically by two drive cylinders (5, 5') in opposing cycles. A pipe shunt (3) is provided inside a material feed con... | 01/09/2001 |
| 5711658 | Diaphragm pump with improved flow manifolds A diaphragm pump including a pump housing having a first housing side and a second housing side; a first unitary manifold flow connected to the first housing side; a second unitary manifold flow connected to the second housing side. The first and second u... | 01/27/1998 |
| 5672322 | Method, dry multi-stage pump and plasmascrubber for converting reactive gases Method for converting reactive gases which are sucked in at a low inlet pressure and are expelled at a higher outlet pressure by a dry multi-stage pump, in which method the reactive gases are physically and/or chemically converted into nonreactive compone... | 09/30/1997 |
| 5344290 | Method and device for controlling a double-cylinder thick matter pump A method and device for controlling a thick matter pump having two feed cylinders, each coupled to a material feed tank and including a drive piston for pumping thick matter through the respective feed cylinder. Each drive piston is driven within a respec... | 09/06/1994 |
| 5238371 | Control arrangement for a two-cylinder pump for thick materials A control system for a pump for thick materials in which the pump has a hydropump with a delivery-volume regulator for adjusting the delivery volume of the hydropump in response to a setpoint signal. A baffle member is coupled between the delivery cylinde... | 08/24/1993 |
| 5152675 | Piston pump with anti-leakage control A single acting, piston type pump comprises a pair of cylinders, and a pair of pistons mounted in respective cylinders for reciprocal movement within the cylinders. The pistons are interconnected with one another so that while one piston is moving upward ... | 10/06/1992 |
| 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 |
| 4917580 | Pump mechanism for simultaneous delivery of two atomizer liquids to a sprayer device A drive mechanism for controlling pump mechanisms for simultaneous delivery of two atomizer liquids in selectable ratio to a sprayer device comprising two pneumatically actuated piston-cylinder drive mechanisms (air motors comprising reversing valve) and ... | 04/17/1990 |
| 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 |
| 4838297 | Apparatus for injecting a fluid into a network The device for injecting a fluid into a network comprises storage and supply means (1, 2) for the fluid to be injected, an injector (11) and a proportioning unit (7) to obtain a constant injection ratio. The injector (11) comprises two housings (12) each ... | 06/13/1989 |
| 4750869 | Method and apparatus for boosting gas from a low-pressure source to a high-pressure receptacle Method and apparatus for transferring and boosting the pressure of gas from a source to a receptacle by sequentially filling and compressing volumes of gas by displacing same with a fluid available at a higher pressure and utilizing pressure differential ... | 06/14/1988 |
| 4701112 | Pumping system A multiple fluid pumping system uses two or more fluid pumps each driven by a pneumatic piston or plunger and cylinder combination whose piston top stroke and bottom stroke positions are detected by reed switches in combination with a magnet attached to t... | 10/20/1987 |
| 4687422 | Continuous extrusion apparatus A dual pump is disclosed in which a single valve controls flow of power fluid to the pump piston. Cams on the pistons and push rods on the valve interact to control the valve timing.... | 08/18/1987 |
| 4666374 | Methods and apparatus for producing uniform discharge and suction flow rates A pumping system for producing uniform discharge and suction rates includes a pump connected to a supply of hydraulic fluid to deliver hydraulic control fluid at a selectable flow rate to a proportioning valve. The proportioning valve divides the flow of ... | 05/19/1987 |
| 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 |
