Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7244357 | Pumps for filtration systems Improvements in product water throughput from a reverse osmosis (RO) membrane filter achieved by thinner feed spacers in the RO element, enhanced recovery (ratio of permeate to feed), pressure recovery of the retentate fluid pressure opposing the feed water pressure... | 07/17/2007 |
| 7147442 | Automatic oil pump, with a valved pumping piston and a valved driving piston unit An automatic oil pump includes a drive chamber, having a reciprocal driving device, and an oil chamber, having a sucking device, located on two sides of a main body. The reciprocal driving device has a piston unit having a valve chamber at its center and a balance v... | 12/12/2006 |
| 7069947 | Fluid control valve A fluid control valve includes a valve body, an annular groove portion formed in an outer periphery of the valve body, a filter provided in the groove portion. The filter includes a plate with a plural of perforations and formed into a cylindrical shape. The filter ... | 07/04/2006 |
| 7048522 | Fluid balanced pump A rodless pump is disclosed which is connected to a pressure source via a first conduit. In a common oilfield application the pump would be connected to the bottom of a tubing string within the reservoir fluid to be produced. A pressure source such as a hydraulic pu... | 05/23/2006 |
| 7005075 | Gas drive electrolytic cell The present invention is directed to an electrolytic cell that is completely sealed during the electrolysis operation during production of oxidant. Gasses generated within the electrolysis operation, primarily hydrogen that is liberated at the cathode surface, incre... | 02/28/2006 |
| 6958058 | Methods and devices for pumping fluid and performing surgical procedures Devices and methods of use of such devices for pumping fluid and for use in surgical procedures preferably include vacuum-driven pumps for providing irrigation and suction functions to the surgical field. Such pumps may be freestanding, external to or integrated int... | 10/25/2005 |
| 6203696 | Fluid driven pumps and apparatus employing such pumps A reverse osmosis or filtration system uses one or more hydraulic intensifiers (integrated motor and pump) to provide all the high pressure fluid to a semi-permeable membrane or filter, the intensifier being powered by the high pressure flushing flow leav... | 03/20/2001 |
| 6155801 | Air blower assembly for spas An air blower assembly for use with spas having a blower-and-motor unit snugly mounted inside an intake housing using a pair of ring-shaped elastomeric gaskets. An outlet housing having a smaller diameter than the intake housing but larger than the motor ... | 12/05/2000 |
| 5996688 | Hydraulic pump jack drive system for reciprocating an oil well pump rod A hydraulic pump jack drive system for reciprocating an oil well pump rod. The drive system comprises at least one hydraulic well head cylinder, a reversible flow hydraulic pump, and a master cylinder. The master cylinder has a free floating master piston... | 12/07/1999 |
| 5871340 | Apparatus for cooling high-pressure boost high gas-fraction twin-screw pumps Apparatuses are described for cooling the rotors of, improving the sealing of, and improving the power efficiency of twin-screw pumps. Such methods include (1) injecting liquid onto the rotor and into the rotor chambers at the point of greatest temperatur... | 02/16/1999 |
| 5764483 | Cooling unit for electronic equipment Heat generated at heat generating components is efficiently transported to a wall of a metal box serving as a heat dissipation section to cool the heat generating components even in an apparatus, in which box the heat generating components together with o... | 06/09/1998 |
| 5454395 | Fluid motor metering device This invention relates to an accurate mechanical proportioning pump and/or mixing device that is adaptable for industrial, commercial and consumer use that incorporates a series of piston-seal-cylinder configuration with necessary check valves and seats t... | 10/03/1995 |
| 5184943 | Rolling diaphragm injection pump An additive injection pump has a rolling diaphragm mounted between a reciprocable assembly and a cylinder to create a secondary fluid pumping chamber in the lower end of the cylinder. The reciprocable assembly has an internal one-way flow passage between ... | 02/09/1993 |
| 4832071 | Fluid motor metering device This invention relates to a pumping device that is adaptable for commercial and residential use that incorporates a series of pistons and valves that automatically and proportionally injects such fluids as fertilizers, oils, soaps and food syrups into var... | 05/23/1989 |
| 4534713 | Pump apparatus The present invention is directed to pump apparatus for purifying water. The apparatus includes a housing containing a reciprocating plunger pump with a permanently attached filtering module preferably containing a reverse osmosis element. A manifold with... | 08/13/1985 |
| 4434056 | Multi-cylinder reverse osmosis apparatus and method Multi-cylinder reverse osmosis pump having at least three cylinders, each feed cylinder having a displacer rod carrying a displacer to divide the cylinder into respective pumping and expansion chambers. Each displacer rod has an expansion chamber valve po... | 02/28/1984 |
| 4367140 | Reverse osmosis liquid purification apparatus In apparatus for the reverse osmosis purification of water or other fluid in a module containing a membrane, the water is forced into the module under pressure using two piston-cylinder assemblies mechanically interconnected with the pressurized fluid fro... | 01/04/1983 |
| 4300540 | Refrigerant solar energy system and method Apparatus and a method for utilizing energy from a high temperature source such as a solar collector to both provide heat energy to a low temperature source such as a body of water and to accomplish mechanical work utilizing a refrigerant motor. The refri... | 11/17/1981 |
| 4288326 | Rotary shaft driven reverse osmosis method and apparatus Reverse osmosis, particularly for water desalination, uses semipermeable membranes which selectively permeate purified water from a feed solution pressurized by a reciprocating feed pump driven by rotating crankshaft. Pump action is assisted by depressuri... | 09/08/1981 |
| 4234294 | Deep well hydraulic pump system using high pressure accumulator A deep well hydraulic pump system using a high pressure accumulator, comprises a down hole pump which is lowered on tubing into the borehole and has a large cylinder and piston connected to a small cylinder and piston with a common piston rod. The large c... | 11/18/1980 |
| 4187173 | Reverse osmosis method and apparatus Reverse osmosis, particularly for water desalination, is achieved using semipermeable membranes which selectively permeate purified water from a feed solution pressurized by reciprocating piston or diaphragm pump. Pump action is assisted by returning pres... | 02/05/1980 |
| 4165759 | Delivering measured quantities of liquid into a fluid A method of and device for delivering measured quantities of liquid into a fluid in which a pressure differential is created in a fluid flow line and fluid is passed from the higher pressure side to a positive displacement fluid pump and returned therefro... | 08/28/1979 |
| 4124488 | Water purification by reverse osmosis Apparatus for reverse osmosis purification of water or other fluid by passing the fluid under pressure across a membrane, through which membrane a part of the fluid passes in purified form, makes use of a piston or diaphragm pump in which the front face o... | 11/07/1978 |
| 4037995 | Liquid propellant gun (damper) A liquid propellant gun utilizes a differential piston having a plurality of bores through its head, which head divides the liquid propellant pumping chamber from the combustion chamber, and propellant supply means providing liquid propellant under pressu... | 07/26/1977 |
| 4013385 | Deep well pump system A deep well pump system incorporating a sub-surface pump unit and a surface power unit with a fluid column formed therebetween. The pump unit incorporates a counterbalance means that is specifically illustrated as a collapsible volume chamber operably eng... | 03/22/1977 |
| 3971341 | Automatic proportioner for low-pressure watering troughs An automatic proportioner for supplying medication to automatic watering troughs in poultry yards, comprises a differential piston unit movable in a stepped casing with the small piston acting as pump and the larger piston as actuator. A tubular valve mov... | 07/27/1976 |
