Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 8016576 | Vehicle transmission with fluid pump having a recirculation circuit The present disclosure relates to a vehicle transmission with fluid pump having a recirculation circuit. The recirculation circuit is configured to direct fluid from an outlet of the pump to an inlet during pump cycling. A method of manufacturing a fluid pump for us... | 09/13/2011 |
| 7726959 | Gerotor apparatus for a quasi-isothermal Brayton cycle engine According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control... | 06/01/2010 |
| 7361001 | Hydraulic vane pump A hydraulic vane pump includes a plurality of members forming a recession and an orifice in fluid communication with one another and with rotating vane cells at an inlet sector of the pump. Air entrained in the vane cells is exhausted through the recession and the o... | 04/22/2008 |
| 7347678 | Friction reducing seal ring for gear pump A seal ring for improving the performance of a gear pump, primarily for vehicle transmissions, comprises the milling of a circular ring on at least one lateral face of an inner gear and an outer gear in a gear pump and inserting a friction reducing ring within the m... | 03/25/2008 |
| 7300267 | Unit for delivering fuel to an internal combustion engine A roller cell pump having a shaped sliding surface composed of elliptical portions results from two different equations. The function of the unit is improved because the equations are modified and include adaptable parameters, so that by adaptation of the parameters... | 11/27/2007 |
| 7241122 | Internal gear pump with recesses on the gear bearing surfaces A positive-displacement pump, in particular for use in machines or dispensing fluids, including two elements that are with respect to one another and which mesh with one another (20, 30), each of them being rotatably mounted in the pump with centered coupling... | 07/10/2007 |
| 7070399 | Variable displacement pump with a suction area groove for pushing out rotor vanes A variable displacement pump has a cam ring, a rotor, a plurality of vanes, a pressure plate and a rear body. The cam ring is accommodated within a pump body. The rotor rotates within the cam ring. The plurality of vanes are inserted retractably into slits formed at... | 07/04/2006 |
| 7070396 | Oil pump apparatus having oil drain In an oil pump apparatus, a drain outlet is positioned outwardly from an inner peripheral surface of a suction passage or from an extended line thereof at a sectional view which takes along an orthogonal direction relative to a central axis of the suction passage an... | 07/04/2006 |
| 7048524 | Internal gear pump with recesses on the gear bearing surfaces A positive-displacement pump, in particular for use in machines or dispensing fluids, including two elements that are with respect to one another and which mesh with one another (20, 30), each of them being rotatably mounted in the pump with centered coupling... | 05/23/2006 |
| 6945763 | Geared pump with forced lubricated coupling A geared feed pump has a housing having a pump chamber in which a rotationally driven pair of gear wheels meshing with one another is disposed for pumping medium out of a suction chamber that communicates with a supply tank, along feed conduits, formed between the c... | 09/20/2005 |
| 6824486 | Gear pump for automatic transmission An oil film is formed between side faces of a pump gear and side faces of a pump casing to thereby reduce wear and reduce sliding resistance. To form the oil film predetermined numbers of recesses are provided in both side faces of a drive gear and in both side face... | 11/30/2004 |
| 6761547 | Trochoid gear type fuel pump Two-inner gears are overlapped with each other through a partition wall and are eccentrically arranged at an inner peripheral side of an outer gear, and eccentric directions of both the inner gears are shifted from each other by 180° to the opposite side. By this, ... | 07/13/2004 |
| 6695604 | Automotive fuel pump gear assembly having lifting and lubricating features The present invention involves a gear assembly having a lifting feature for a fuel pump for supplying fuel to an automotive engine from a fuel tank. The gear assembly comprises an inner gear and an outer gear in mating relationship with the inner gear. Th... | 02/24/2004 |
| 6592349 | Method for the metered discharge of a string of a viscous medium and feedpump for discharging a string of a viscous medium A feedpump for discharging a string of a viscous medium containing solid particles. The feedpump includes a casing and two gearwheels drivable to execute an oppositely directed rotation and arranged in the casing so as in each case to form and maintain ga... | 07/15/2003 |
| 6544013 | Oil pump apparatus An oil pump apparatus includes an oil pump housing having a first suction port, a second suction port and a discharge port in the circumferential direction thereof. A shape of the end portion in the anti-rotational direction at the second suction port is ... | 04/08/2003 |
| 6485279 | Thrust load reliever The area of the discharge end of a screw rotor acted on by the discharge pressure is reduced by locating a region of suction pressure acting on the discharge end of the rotor and separating the suction and discharge pressures by a labyrinth seal located b... | 11/26/2002 |
| 6481990 | Hydraulically balanced multi-vane hydraulic motor A multi-vane hydraulic motor for accessory drive in which the vanes of a hydraulically balanced rotor are primarily urged into operative engagement with a surrounding cam by forces of the hydraulic fluid in undervane passage produced by an associated hydr... | 11/19/2002 |
| 6481992 | Vane pump A vane pump includes a cylindrical rotor rotatable inside of an oval-shaped rotor chamber defined by a cam ring around the rotor. A thrust plate and a pressure plate on opposite sides of the cam ring cover the rotor chamber and are squeezed together by a ... | 11/19/2002 |
| 6425748 | Positive displacement rotary pump A positive displacement rotary pump including a housing having an internal chamber and inlet and discharge ports, a sealing land on the housing between a downstream end of the inlet port and an upstream end of the discharge port, and a rotating group in t... | 07/30/2002 |
| 6422845 | Rotary hydraulic vane pump with improved undervane porting The pump has a multi-vane rotor operating within a cam ring to pump oil to a component such as a power steering gear. The pump rotor sandwiched between stationary thrust and pressure plates is supplied with oil from a surrounding fluid chamber through ali... | 07/23/2002 |
| 6332764 | Displacement type fluid machine having an orbiting displacer forming a plurality of spaces and method for manufacturing same A displacement type fluid machine for reducing a fluid loss of a discharge process as much as that of a scroll fluid machine has a displacer which is provided with at least one through hole for working the outer wall surface of said displacer during manuf... | 12/25/2001 |
| 6312237 | Displacement type fluid machine In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers... | 11/06/2001 |
| 6312239 | Screw-type compressor having an axial bearing part on only one rotor A screw-type compressor comprises a housing (12) in which a primary rotor (14) and a secondary rotor (16) are arranged each of which is provided with a shaft (18,24) and a screw rotor (20,26). The secondary rotor (16) is axially supported by the primary r... | 11/06/2001 |
| 6257853 | Hydraulic motor with pressure compensating manifold A pressure compensating manifold for a gerotor device having a manifold with bidirectional valving passages and a passage selectively connecting as least one of such bidirectional passages to a chamber behind the manifold so as to pressure equalize the ge... | 07/10/2001 |
| 6099279 | Displacement fluid machine An orbiting fluid machine has a feature that the speed of sliding movement is low, while vibrations are small, its performance is lowered when the rotational speed becomes high, and this problem is resolved by the following structure. A displacement fluid... | 08/08/2000 |
| 6086345 | Two-piece balance plate for gerotor motor A gerotor motor of the type having an end cap (13), and a stationary valve plate (15) disposed adjacent a rearward surface of the gerotor gear set (17). Adjacent a forward surface of the gerotor star (27) is a balancing plate assembly (19) including a rad... | 07/11/2000 |
| 6086344 | Hydraulic motor lubrication path A lubrication path in a gerotor motor extending in the face of the rotor or an adjoining surface from a gerotor cell having relatively high pressure to the central cavity of the device to provide cooling and lubrication fluid thereto.... | 07/11/2000 |
| 6062836 | Gear pump A gear pump comprising two gearwheels moving in opposite senses, the gears whereof engage with one another and thus, separated from one another in a pressure-tight manner, form a delivery side and a suction side; a central plate wherein the gearwheels are... | 05/16/2000 |
| 5769617 | Vane-type compressor exhibiting efficiency improvements and low fabrication cost A rotary sliding-vane compressor is described which contains a single rotor with compressor and expander sections, together with a reduced number of parts and efficiency improvements compared to conventional compressors.... | 06/23/1998 |
| 5495756 | Cylindrical chamber for liquid meter with oscillating piston A cylindrical chamber (1) for an oscillating piston type of liquid counter comprises notably a biconcave fixed partition wall (9) and grooves on the lower and/or upper edges of the piston and, as the case may be, on the small cylinders of the chamber 1. T... | 03/05/1996 |
| 5374171 | Rotary compressor thrust washer A rotary compressor including an orbiting piston is disposed within a cylinder bore. A crankshaft with an eccentric causes the piston to orbit within the cylinder block. Crescent shaped polymeric washers are interfit between the eccentric and cylinder bor... | 12/20/1994 |
| 5340284 | Two stage fuel pump with pressure passage in the first stage rotor A fuel pumping apparatus for supplying fuel to an internal combustion engine has a drive shaft which is coupled to a rotary part of a high pressure pump. A low pressure pump for supplying fuel to the high pressure pump has a rotor mounted about the drive ... | 08/23/1994 |
| 5322427 | Rotary-blade air conditioner compressor for heavy-duty vehicle A rotary blade air conditioner compressor is provided which includes a compressor housing having a cylindrical chamber. Chamber covers are mounted to respective ends of the cylindrical chamber. A reservoir is fluidly connected to an outlet and an inlet of... | 06/21/1994 |
| 5316455 | Rotary compressor with stabilized rotor The same number of grooves 20 through 27 are provided in end surfaces 19a and 19b of a roller 19. The grooves 20 through 27 have communicating portions 20a through 27a which communicate with an inner peripheral side of the roller 19 and sealed portions 20... | 05/31/1994 |
| 5310326 | Rotary compressor with improved bore configuration and lubrication system A rotary compressor, such as a sliding vane compressor, comprises a housing having a bore, a rotor assembly operatively arranged to rotate within the bore, vanes operatively arranged at the rotor assembly to move linearly relative to the rotor assembly an... | 05/10/1994 |
| 5224838 | Gear pump with groover sealing means A gear pump for pumping viscous material has a housing with an inlet and an outlet and a gear chamber between the inlet and the outlet. A pair of intermeshing gear wheels which are rotatably supported by bearings in the gear chamber of the housing have en... | 07/06/1993 |
| 5197869 | Rotary gear transfer pump having pressure balancing lubrication, bearing and mounting means An externally driven rotor is rotatable within a pumping chamber and is located in meshing relationship with an internal idler gear. An annular bearing mounted within the housing in confronting relationship with a peripheral surface of the rotor, provides... | 03/30/1993 |
| 5188522 | Vane pump with a throttling groove in the rotor A vane pump is disclosed, which comprises a body structure defining a space which has mutually opposed surfaces; a cam ring tightly disposed in the space; a rotor having a plurality of radially extending vane mounting grooves and rotatably disposed in the... | 02/23/1993 |
| 5154593 | Vane pump with annular groove in rotor which connects undervane chambers A device for improving the starting response of a vane pump and for reducing the power loss during a high speed operation of the pump. The vane pump includes a rotor formed with slits, in which slits vanes are slidably disposed. To drive the respective va... | 10/13/1992 |
| 5145347 | Gerotor pump with blind-end groove on each lobe of the annulus A gerotor set (FIG. 1) has grooves 108 extending across the end face of the annulus adjacent the outlet port so as to allow flow from each chamber in turn into the outlet at a time when the chamber per se is not yet registered with the outlet, so as to pr... | 09/08/1992 |
