Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 8047817 | Cleaning method of a rotary piston vacuum pump A method for managing deposits within a pump mechanism (81) is provided. Fluid suitable for dissolving, diluting or otherwise disengaging deposits which have accumulated on the internal working surfaces of the pump is brought into contact with the mechanism. ... | 11/01/2011 |
| 7094036 | Vacuum pumping system A vacuum pumping system comprises a first gas supply for supplying a first gas, such as xenon, to a vacuum chamber. A pump receives the gas output from the chamber. A second gas supply supplies a purge gas, such as nitrogen or helium, for pumping with the first gas.... | 08/22/2006 |
| 7000656 | Dosing system There are practical difficulties in dosing a component of a composition into its container, such as a personal care product into a hand-holdable dispenser on a filling line, due in part to the short time that is available for the operation. The difficulties can be a... | 02/21/2006 |
| 5934372 | Pump system and method for pumping well fluids The invention provides apparatus for producing well fluids from an oil bearing formation penetrated by a well. The apparatus includes a tubing string forming a production flow path for production fluids between the earth's surface and a location in the we... | 08/10/1999 |
| 5765639 | Tubing pump system for pumping well fluids The invention provides apparatus for producing well fluids from an oil bearing formation penetrated by a well including a tubing string forming a production flow path for production fluids between the earth's surface and a location in the well suitable fo... | 06/16/1998 |
| 5701797 | Sealing system A piston reciprocally movable within a cylinder is sealed to the cylinder wall by fluid at a pressure greater than those of the fluids on the opposed sides of the piston supplied to the space (18) between two seals (19, 20) operative between the piston an... | 12/30/1997 |
| 5624241 | Flexible hydraulic pump and agitator apparatus An improved towed apparatus for pumping and/or agitating manure slurries is disclosed. The apparatus, which is configured for energization by a tractor's hydraulics and power take-off system, includes an elongate conduit beam member flexible along a cente... | 04/29/1997 |
| 5535918 | Sparging adapter A liquid dispensing vessel having an air space above the liquid near the top of the vessel has a fluid pump with a suction inlet and a pressure outlet. The pump is operable in a first mode to pump liquid and in a second mode to pump air. There is a first ... | 07/16/1996 |
| 5431957 | Apparatus and method for protection of pumps used for delivery of air- or moisture-sensitive liquids A means and method for protecting the moving parts of a pump that is used to pump air- or moisture-sensitive liquids, comprising blanketing the wetted parts of the pump with an inert medium and/or admixing the process liquid with a low vapor pressure liqu... | 07/11/1995 |
| 5337651 | Apparatus and method for protection of pumps used for delivery of air- or moisture-sensitive liquids A means and method for protecting the moving parts of a pump that is used to pump air- or moisture-sensitive liquids, comprising blanketing the wetted parts of the pump with an inert medium and/or admixing the process liquid with a low vapor pressure liqu... | 08/16/1994 |
| 5213468 | Bearing flushing system A bearing flushing system is provided that enables the clearance between a bearing and shaft to be flushed with water but prevents the backflow of the pumped liquid into the region. The system hereof includes a flow restrictor located downstream of the be... | 05/25/1993 |
| 5015441 | Anti-corrosion method of air compression device and anti-corrosion air compression device There are disclosed a method of preventing corrosion of the interior surfaces of air compression devices and an anti-corrosion air compressing device designed for carrying out the method. According to the method, a basic solution is supplied to the interi... | 05/14/1991 |
| 4995794 | Vacuum pumps A vacuum pump comprising a pumping chamber having an inlet and an outlet through which gas from an enclosure connectible to the inlet can be pumped, in which means are provided to allow the selective introduction through the chamber of a flow of recircula... | 02/26/1991 |
| 4880062 | Oil well downhole liquid injection assembly A downhole pump is actuated by a reciprocating unit comprising a tubular rod string, a valve assembly, and a tubular plunger rod. A flow passage extends through the reciprocating unit when the valve assembly is in an "open" position, whereby liquid may be... | 11/14/1989 |
| 4832127 | Method and apparatus for producing viscous crudes To assist electric submersible pumps in producing highly viscous crudes from oil wells, injection water is conveyed to the pump assembly, injected into the crude, and mixed with it to form an oil-in-water emulsion. This effectively decreases the viscosity... | 05/23/1989 |
| 4348162 | Combination autoclave pump and nozzle The specification describes a fluid dispensing piston pump that is adapted to be cleaned in places without disassembly of the pump. During the cleaning operation the piston of the pump is positioned in an area of larger diameter at the base of the cylinde... | 09/07/1982 |
| 4273263 | Filling apparatus for fluid media A dispensing apparatus for fluid media is disclosed which comprises a dosing piston movably guided within a dosing cylinder and a subsequent rotary valve, wherein the cleaning and/or sterilization of the parts coming into contact with the filling product ... | 06/16/1981 |
| 4267888 | Method and apparatus for positioning a treating liquid at the bottom of a well This invention relates to a method and apparatus for positioning a selected liquid at the bottom of a well, such as an oil well, while having in the well at least a string of tubing, a rod pump, a string of rods, and a standing valve, without disturbing t... | 05/19/1981 |
| 4207036 | Subsurface pumping installation for handling viscous or sand-laden fluids A subsurface pumping installation in which solvent or diluent is introduced to the well from the surface and blends with the well fluid to enable it to be pumped more readily. The diluent is introduced through a power tubing which may be either concentric... | 06/10/1980 |
| 4188172 | Method and means for injecting hot liquid when pumping cold liquid A method of and means for introducing a heated liquid into a cold liquid the purpose of improving the pumping rate of the cold viscous liquid is provided. The heated liquid is directed upward into the suction inlet of the cold liquid pump through an ori... | 02/12/1980 |
| 4173430 | Method of injecting a back filling injection material in a shield forming process A novel method of injecting a back filling injection material employed in a shield-forming process is described herein. A screw type injection pump with a hopper connected to its intake port is utilized. This pump is rotated in a reverse direction to inta... | 11/06/1979 |
| 4137017 | Submersible deep well pump A submersible deep well pump having two interconnecting chambers slidably receiving a movable hollow piston, each chamber having a check valve wherein movement of the piston alternately opens and closes the check valves allowing liquid displaced by the pi... | 01/30/1979 |
| 4089626 | Injector pump An injection pump comprising a barrel and plunger type tubing pump for pumping liquid from a deep borehole through tubing while injecting a treating liquid down through a hollow sucker rod. Just above the traveling valve is a blender coupling means. The h... | 05/16/1978 |
| 4056335 | Subsurface pumping installation for handling viscous or sand-laden fluids A subsurface pumping installation for handling viscous or sand-laden fluids. The installation includes parallel power and production tubing strings, a pump located at the bottom of the power tubing string, and a crossover which affords communication betwe... | 11/01/1977 |
| 4051852 | Aspirating device A device for aspirating body fluids comprising, a valve assembly having a first port to receive body fluids, a second port for passage of the body fluids from the valve assembly, and a passageway communicating between the first and second ports. The valve... | 10/04/1977 |
