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 |
| 7828511 | Axial tip turbine driven pump An axial tip turbine driven pump in which a first fluid pumped by an inducer is driven by a second fluid that reacts with a turbine blade extending from a shroud on the inducer. The inducer includes a set of screw thread blades and a second set of partial blades tha... | 11/09/2010 |
| 7748950 | Turbofan engine A turbofan engine of the invention is provided with a fan first-stage moving blade for taking an air therein, and a spinner rotationally driving the fan first-stage moving blade, the spinner has a spiral blade extending spirally to an outer side in a radial directio... | 07/06/2010 |
| 7455497 | High performance inducer An improved high performance inducer for a pump assembly includes a set of primary blades and splitter blades to achieve a vapor-to-liquid ratio up to 1:1. Minimum back pressure is provided at the leading edge to aid in getting fluid into the blades where the vapor ... | 11/25/2008 |
| 7407372 | Progressing cavity pump or motor A progressing cavity pump or a motor includes, in one embodiment, an outer tube 12, an inner tube 14, and a plurality of apertures 16. A pair of annular seal glands 18 seal the stator material to the outer tube. The stator material is inj... | 08/05/2008 |
| 7331482 | Dispense pump with heated pump housing and heated material reservoir A heated dispense pump overcomes the limitations of conventional systems providing for reliable and efficient heating of the dispensed material in a system that is compact, lightweight, and accurate. A pump housing and cartridge body are formed of a thermally conduc... | 02/19/2008 |
| 7316548 | Stator for an eccentric screw pump or an eccentric worm motor operating on the Moineau principle The invention relates to a stator for an eccentric screw pump or an eccentric worm motor having a stator, including an outer tube that is provided with a lining of rubber or a rubber-like material and has a hollow space, in the shape of a double or multiple spiral, ... | 01/08/2008 |
| 7270469 | Apparatus and method for adding pigmentation to concrete mix A pigmentation dispenser utilizes a hopper having two rotors therein, a first rotor above a second rotor. The second rotor moves the pigmentation material through an outlet opening and deposits it on a conveyor containing a concrete mix. The concrete mix and pigment... | 09/18/2007 |
| 7264439 | Evacuating device A device (1), for evacuating a chamber to pressures in the high vacuum range includes a suction-side vacuum pump (2) and an atmospheric-pressure-side vacuum pump (3). The suction-side vacuum pump (2) is a mechanical kinetic vacuum pump wi... | 09/04/2007 |
| 7241117 | Motor shaft assembly and method A method for assembling a motor shaft with a bearing, a motor housing, and an impeller is disclosed. A motor shaft extension is used to retain the impeller axially on the motor shaft and allows the motor shaft to drive an additional component, such as an impeller, l... | 07/10/2007 |
| 7234925 | Screw pump A pump including a power rotor and an idler rotor, the rotors each being provided with a generally helical screw thread and being mounted for rotation in a housing such that the screw threads of the rotors mesh and rotation of one rotor causes rotation of the other ... | 06/26/2007 |
| 7226277 | Pump and method A pump for moving a liquid including stator and a permanent magnet rotor which rotates to move at least one a helical pumping member. ... | 06/05/2007 |
| 7178745 | Dispense tip with vented outlets In a fluid pump and cartridge assembly, a cartridge includes a material inlet port, a material outlet port, and a feed screw. The feed screw delivers fluid to be dispensed from the fluid inlet to the outlet port. The fluid inlet is preferably elongated in a directio... | 02/20/2007 |
| 7165933 | Screw pump for transporting emulsions susceptible to mechanical handling A screw pump for transporting a viscous product is described comprising a cylindrical housing connected to a removable bottom piece in one end and a removable cap in the opposite end, a rotor having one or more screw blades connected to a driving motor, an inlet and... | 01/23/2007 |
| 7134835 | Process for manufacturing a stator for vacuum pump and stator obtained thereby A process for manufacturing stators of vacuum pumps, and stators obtained thereby, wherein a plurality of stator discs or rings are formed, preferably by pressing, and then stator discs or rings are coaxially stacked and mutually rotated so as to form a stator surfa... | 11/14/2006 |
| 7131827 | Stator for an eccentric screw pump or an eccentric worm motor operating on the moineau principle The invention relates to a stator for an eccentric screw pump or an eccentric worm motor, including an outer tube that is provided with a lining of rubber or a rubber-like material and has a hollow space or cavity, in the shape of a double or multiple spiral, for ac... | 11/07/2006 |
| 7115197 | Coating process This invention relates to a process for electroplating a selected surface area of a component with a crushable zinc alloy, the method comprising utilizing a relatively low current density in an alkaline solution during the electroplating process to provide a crushab... | 10/03/2006 |
| 7096712 | Material testing system for turbines The wear resistance of impellers used in multi-stage turbine pumps is tested by using a multi-stage turbine pump having impellers with different physical properties to pump a fluid containing small amounts of an abrasive material. After the fluid has been pumped for... | 08/29/2006 |
| 7090460 | Pump embodied as a side channel pump A side channel pump, preferably a vacuum pump, includes a driven rotor (16) and a fixed stator (14). The rotor (16) and the stator (14) define a pump channel circulating in a peripheral direction. Blades are fixed onto the rotor, protrudi... | 08/15/2006 |
| 7064468 | Brush-less motor using vernier structure A brush-less motor includes a rotor with a magnet alternately magnetized N pole and S pole in a rotating direction, and a core with plural salient poles on which coils are wound. The core faces the magnet to form a magnetic circuit. Each one of the salient poles are... | 06/20/2006 |
| 7052230 | Pump assembly A pump assembly including a pump, a pump frame and a motor, the pump including a pumping member which is mounted in a pump housing, relative rotation of the pumping member with respect to the pump housing causing pumping of fluid, and the motor including a rotor and... | 05/30/2006 |
| 7033132 | Bladeless pump A pump which is bladeless, and uses a substantially cylindrical outer cylinder to rotate inside a ridged inner chamber. ... | 04/25/2006 |
| 7029231 | Liquid seal pump of the helical screw type Liquid seal pump of the helical screw type including a pump housing (3) with an inlet (2), an outlet (6), and within the housing provided a helical screw rotor (7) driven by means of a motor (8). The outlet (6) of the pump (... | 04/18/2006 |
| 7021890 | Turbo pump In order to provide a high-head, large-delivery turbopump adapted for excellent suction performance and foreign matter passability by having characteristics of an inducer, axial flow vanes, and mixed flow vanes imparted together to centrifugal vanes, a progressively... | 04/04/2006 |
| 7018170 | Ribbon drive pumping apparatus and method with added fluid A ribbon drive pumping apparatus and method for substantially incompressible fluids, such as liquids, is disclosed. The pump has an extended tube having an intake at a first end and an outlet at a second end. A ribbon formed of helical coils is mounted in the tube f... | 03/28/2006 |
| 7000853 | System and method for control of fluid dispense pump In a fluid pump and cartridge assembly, a cartridge includes a material inlet port, a material outlet port, and a feed screw. The feed screw delivers fluid to be dispensed from the fluid inlet to the outlet port. The fluid inlet is preferably elongated in a directio... | 02/21/2006 |
| 6962479 | Compound centrifugal and screw compressor A compound centrifugal and screw compressor comprising two separate sections. The first section is a conventional centrifugal compressor body 2 with a plurality of radial vanes 3 and 4 on the front face. The second section of the compressor is a... | 11/08/2005 |
| 6957783 | Dispense tip with vented outlets In a fluid pump and cartridge assembly, a cartridge includes a material inlet port, a material outlet port, and a feed screw. The feed screw delivers fluid to be dispensed from the fluid inlet to the outlet port. The fluid inlet is preferably elongated in a directio... | 10/25/2005 |
| 6951445 | Apparatus for use in slurry pumps Apparatus for use with a slurry pump, including a stationary part which includes a processing chamber having an inner side wall and a central axis, an inlet and an outlet to and from the processing chamber and a rotatable part at least partially disposed within the ... | 10/04/2005 |
| 6926492 | Suction housing for rotor/stator pump A pump of the rotor/stator type for wet cementitious material includes a suction housing for receiving and directing the material into a rotor/stator combination for delivery to the location of use. The suction housing is in the form of a rectangular closed structur... | 08/09/2005 |
| 6926494 | Hydraulic turbine with increased power capacities A hydraulic turbine with increased power capacities for new or existing hydroelectric installations. The turbine has a larger axial runner wheel and a reshaped runner ring peripherally extending around the runner wheel. A draft tube with a larger elbow section exten... | 08/09/2005 |
| 6881026 | Screw compressors with rotor and casing design for controlling deflections A screw compressor includes a housing and a screw rotor disposed in the housing and rotatable relative to the housing for compressing a refrigerant, the housing and the screw rotor having a rest condition, and an operating condition wherein at least one of the housi... | 04/19/2005 |
| 6854955 | Internal lubrication screw pump for hollow shaft A rotary machine is provided, such as an electromechanical device, that includes a housing having a lubricating oil disposed within the housing. A shaft is rotatable about an axis relative to the housing. The shaft has a passage extending to an end portion of the sh... | 02/15/2005 |
| 6851923 | Fluid pump and cartridge In a fluid pump and cartridge assembly, a cartridge includes a material inlet port, a material outlet port, and a feed screw. The feed screw delivers fluid to be dispensed from the fluid inlet to the outlet port. The fluid inlet is preferably elongated in a directio... | 02/08/2005 |
| 6827550 | Vacuum pump A vacuum pump adopts a positioning structure in which stator blades and spacers are arranged in the radial direction of a pump case by the contact between the outer peripheries portion of the stator blades and the inner periphery portion of the pump case and the con... | 12/07/2004 |
| 6790016 | Motor and its blade unit A motor and its blade unit include a blade unit made of a conical fundamental body and a plurality of blades formed around the surface of the conical fundamental body. The blades of the blade unit are multi-sectioned ones of different sizes. These blades increase wa... | 09/14/2004 |
| 6699012 | Pressure-increasing device driven by liquid A pressure-increasing device driven by liquid includes a body, a power unit, a drive unit and a bottom base. The body has a housing provided with an inner tube in the interior, and a water passage formed between the housing and the inner tube. A drive uni... | 03/02/2004 |
| 6692225 | Liquid pressing device A liquid pressing device includes mainly a power device consisting of a motor with a spindle, an upper cap on the motor and a lower cap under the motor, a shell for containing the power device, a helical device fitted around the spindle of the motor and h... | 02/17/2004 |
| 6626638 | Ribbon drive power generation for variable flow conditions The ribbon drive generation apparatus is comprised of a ribbon-like curved shape, composed either of metal or other suitable material, attached to a central axle with the complete apparatus being contained in a tube having a constant diameter for the leng... | 09/30/2003 |
| 6592335 | Ribbon drive pumping apparatus and method The ribbon drive pump has an extended tube having an intake at a first end and an outlet at a second end. A ribbon formed of helical coils is mounted in the tube for rotation and the frequency of the coils decreases from the first end to the second end of... | 07/15/2003 |
| 6551054 | Method and apparatus for pumping a material and a rotor for use in connection therewith A method and apparatus is disclosed for pumping a material, especially thick, gas-containing, fiber suspensions for wood processing. The apparatus includes a centrifugal pump with a rotor having blades twisted such that the pitch of the blade changes alon... | 04/22/2003 |
