| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 418206100 | Having each radial protuberance of like dimension | 75 |
| 20090041605 | ADJUSTING VALVE FOR ADJUSTING THE DELIVERY VOLUME OF A DISPLACEMENT PUMP - An adjusting valve adjusting valve for adjusting the delivery volume of a displacement pump includes a valve casing, a valve piston which is mounted such that the valve piston can be moved within the valve casing, a valve spring which counteracts a force exerted by the valve-actuating pressure on the valve piston, and an adjusting device serving to adjust the valve piston in the direction of or counter to the force exerted by the valve-actuating pressure. A displacement pump exhibiting an adjustable delivery volume, includes a pump casing, a delivery chamber formed in the pump casing and a delivery member and the adjusting valve for adjusting the delivery volume, arranged in a flow of the fluid delivered by the delivery member. | 02-12-2009 |
| 20090047163 | Roots Pump and Fuel Cell System - There is disclosed a Roots type pump in which two rotors are rotated synchronously in a pump chamber to compress fluid therein, wherein respective stop positions of the rotors in the pump chamber at a time of stopping the pump are determined independently of each other. | 02-19-2009 |
| 20090155115 | Gearwheel pump - The invention relates to a gear pump with two engaging gearwheels ( | 06-18-2009 |
| 20090169408 | Gear Pump - Gearwheel pump, having a housing with at least two intermeshing gears with shafts supported by slide bearings lubricated with pumping medium (M) fed from a suction side to a pressure side, a return duct which leads pumping medium which flows outward through the plain bearing back to the suction side, and a valve ( | 07-02-2009 |
| 20090252633 | LOBE PUMP SYSTEM AND METHOD OF MANUFACTURE - A method of manufacturing a rotor to be used in a dual-rotor lobe pump system for pumping a material at a periodic rate is provided. The method includes selecting a desired periodic flow rate for the material, selecting a number of lobes for the rotor, and selecting either a thickness of the rotor or a spacing between the dual-rotors' axes of rotation in the lobe pump. The method also includes determining the profile for the rotor based on the desired periodic flow rate, so that when the rotor is operated within the dual-rotor lobe pump system, the material can be pumped at substantially the desired periodic flow rate. In another embodiment of the invention, a lobe pump rotor profile is formed by the method described above. | 10-08-2009 |
| 20090297385 | Rotary Motor With Intermittent Movements of the Rotors - The invention provides a rotary motor comprising a first rotor member rotatable about a first axis; and a transmission system for rotating the first rotor member and the second rotor member; characterised in that the first rotor member and the second rotor member are adapted to rotate at variable angular velocities. | 12-03-2009 |
| 20100003154 | ROTARY MACHINE HAVING FURSTO-CONICAL ELEMENTS - A system for enabling fluid flow is provided which includes a plurality of frusto-conical elements, central and outer spherical shells which enclose the frusto-conical elements, constraining means which constrain the elements between the central and outer spherical shells, and input and output means for allowing fluid flow into and out of the system. The geometry of the frusto-conical elements and their alignment within the system allows the formation of chambers between adjacent elements and their central and outer shells. The elements are free to roll about one another within the system in a synchronized manner. This synchronized rolling is results in a cyclical change in volume of those chambers. | 01-07-2010 |
| 20100061873 | Bi-directional converter between pressure and rotational force - A bi-directional converter between pressure and rotational force includes engaging rotation members that continue to rotate while being adjacent to each other without collision; the rotation members and an outer wall form an enclosed space; rotation shafts of the rotation members are mutually engaged by gear wheels; the rotation members are synchronized and rotate in opposite directions; the rotation members are rotated by a volume change of the enclosed space by application of pressure from outside; and the volume of the enclosed space is changed by rotational force to generate a pressure difference. The bi-directional converter includes an open-close mechanism opening and closing supply exhaust paths inside the rotation member and disposed to the rotation shaft or the outer wall according to a rotation angle. | 03-11-2010 |
| 20100098572 | HIGH SPEED GEAR PUMP - A gear pump comprises a casing having an inlet, an interior, and an outlet. An inlet gear is positioned at the inlet and pressurizes fluid received at the inlet. A drive gear is positioned at the outlet of the casing, the drive gear receiving fluid pressurized by the inlet gear to output pressurized fluid at the outlet. A speed-reduction gear is meshed to the drive gear and connected to the at least one inlet gear, the speed-reduction gear having a greater number of teeth than the drive gear to reduce a rotational speed from the drive gear to the inlet gear, such that the inlet gear has a lower speed that the drive gear. An input shaft is coupled to the drive gear and receives a rotational input to actuate the drive gear. | 04-22-2010 |
| 20100104464 | ROOTS PUMPS - A Roots vacuum pump stator is arranged to house a pair of intermeshing rotors, said stator being characterised in that it comprises a director or deflector arranged to direct solid material entrained in a gas pumped through the pump towards the outlet. In other words, the stator according to the present invention has a means for directing or deflecting powder or solid material entrained in a gas being pumped directly towards an outlet of the pump or out of the pump. The directing means can comprise a channel disposed between the arcuate surface and the outlet, said channel comprising a portion that engages the arcuate surface prior to the bottom-dead-centre position and which extends away from the rotor's axis of rotation towards the pump outlet. Thus, powder entrained in the pumped gas is effectively removed from pumping volume in a way which reduces the likelihood of any solid material causing the pump to seize: the channel can be arranged so that the solid material is “flung” towards the outlet or away from a meshing zone where rotors mesh with one another. | 04-29-2010 |
| 20100143175 | INTERNAL GEAR PUMP WITH OPTIMIZED NOISE BEHAVIOUR - An internal gear pump ( | 06-10-2010 |
| 20100158738 | GEAR PUMP WITH UNEQUAL GEAR TEETH ON DRIVE AND DRIVEN GEAR - A gear pump comprises a first gear to be connected to a source of drive, and having a first plurality of gear teeth. A second gear has a second plurality of teeth engaged with the first gear teeth. The first gear teeth contact the second gear's teeth on a contact face, causing the second gear to rotate. The first plurality of teeth is greater than the second plurality of teeth. | 06-24-2010 |
| 20100172782 | VACUUM PUMP - A pair of Northey rotors for a vacuum pump, in which each rotor comprises two opposing, substantially parallel faces, and a peripheral surface located between the opposing faces. In order to reduce damage caused by pumping a gas stream containing liquid or solid particulates, a plurality of grooves is located on the peripheral surface for accommodating the particulates. | 07-08-2010 |
| 20100202913 | GEAR PUMP - A gear pump ( | 08-12-2010 |
| 20100209281 | Toy Fluid Pumping Gun - A fluid pumping device is disclosed. The fluid pumping device includes a housing having a front end and a rear end, a fluid discharge opening in the front end of the housing, a pump assembly, a crank assembly rotatably connected to the pump assembly wherein the crank assembly operates the pump assembly, and a fluid storage reservoir connected to the gear housing from which fluid is drawn into the gear housing to be pumped through the fluid discharge opening. | 08-19-2010 |
| 20100290941 | OIL PUMP FOR A VEHICLE - A plurality of convex portions that protrude radially outward from a plurality of positions separated in the circumferential direction are provided on the outer peripheral surface of a driven gear. Each convex portion has, in the circumferential direction of the driven gear, a rising surface that rises from a minimum diameter position to a maximum diameter position in the direction opposite the rotational direction of the driven gear, and a falling surface that falls from that maximum diameter position to a minimum diameter position that is adjacent to and in back of that maximum diameter position with respect to the rotational direction of the driven gear. The circumferential length of the falling surface is greater than the circumferential length of the rising surface. | 11-18-2010 |
| 20110103993 | GEAR WHEEL WITH PROFILE CAPABLE OF MESHING WITH SEMI-ENCAPSULATION IN A GEARED HYDRAULIC APPARATUS - A geared hydraulic apparatus comprises a pair of gear wheels which mesh with each other with semi-encapsulation. Each gear wheel has a plurality of teeth with a profile which falls within a band of tolerance of ±15, more preferably ±20, and even more preferably ±30 with respect to the height of the tooth, with respect to a profile similar to a profile defined by a predetermined spline function passing through a plurality of nodal points having pre-established coordinates {X,Y} with origin on the rotational axis. | 05-05-2011 |
| 20110311386 | Pumping Systems - A modular symmetrical asphalt pumping system providing a series of field-configurable gear pumps and meters usable to safely and efficiently pump viscous molten fluids, such as, asphalt and similar bituminous materials. The system utilizes highly symmetrical physical geometries and modular components to allow for the development of multiple pump configurations using a reduced quantity of parts. Preferred arrangements of the system reduce pump pulsing and cavitation. | 12-22-2011 |
| 20120082581 | GEAR PUMP - In a gear pump according to the present invention, a wall surface portion of a casing ( | 04-05-2012 |
| 20120141316 | GEAR ROOT GEOMETRY FOR INCREASED CARRYOVER VOLUME - A gear includes a gear root defined by a stretched root blended into an involute tooth profile curve within a True Involute Form diameter. | 06-07-2012 |
| 20120207638 | ROTARY PISTON PUMP - The invention relates to a rotary lobe pump for conveying a fluid medium containing solids, said rotary lobe pump comprising two rotary lobes each having rotary lobe vanes engaging with other and each having a rotational axis and an outer periphery, wherein the rotational axes of the two rotary lobes are spaced apart from each other and arranged parallel to each other and wherein the outer peripheries of the two rotary lobes partially intersect each other, and further comprising a housing with an inlet opening and an outlet opening and an inner wall and an outer wall, the inner wall of the housing enclosing a respective section of the outer peripheries of the rotary lobes and wherein the rotary lobe pump is adapted to convey the medium in a feeding direction from the inlet opening to the outlet opening. According to the invention, the rotary lobe pump is characterized in that the outlet opening on the inner wall of the housing has a maximum discharge enlargement that is greater in a direction running parallel to the plane of the rotational axes and perpendicularly to the rotational axes than the distance between the rotational axes. | 08-16-2012 |
| 20120219447 | COUPLING SHAFT FOR GEAR PUMP - A coupling shaft assembly includes a coupling shaft with a first radial shoulder and a second radial shoulder, the first radial shoulder and the second radial shoulder each include at least one slot to provide a lubricant flow path. | 08-30-2012 |
| 20120219448 | ADJUSTABLE ROTARY PUMP WITH REDUCED WEAR - A rotary pump having a variable delivery volume, including: a casing; a delivery chamber formed in the casing; at least one delivery rotor which is rotatable in the delivery chamber; an actuating member which is arranged facing a front face of the delivery rotor or surrounds the delivery rotor, and is moveable in the casing for adjusting the delivery volume; the actuating member chargeable with an actuating force which is dependent on a fluid requirement; a track which is formed in the casing and guides the actuating member on an actuating member sliding surface in a sliding contact; and a sliding material which forms at least one of the track and the actuating member sliding surface. | 08-30-2012 |
| 20130129554 | LUBRICANT PUMP AND CONTROL PISTON - A lubricant pump includes a housing in which at least one pair of intermeshing gear wheels is arranged for conveying lubricant. One gear wheel is rotatably supported on a drive shaft and the other gear wheel is rotatably supported on an axially shiftable displacement unit for adjusting a variable flow volume. Axially displaceable in a housing receptacle is a control piston for hydraulically adjusting the position of the displacement unit. The control piston is configured as composite structural part and has a central longitudinal shaft and cylinder rings which include control edges for clearing or closing control channels feeding into the receptacle. The cylinder rings are made from a material which reduces friction and/or wear with respect to the receptacle, and the central longitudinal shaft has at least one section made from a material having a coefficient of thermal expansion at least substantially corresponding to the one of the receptacle. | 05-23-2013 |
| 20130156625 | Pump System - One embodiment of the pump system includes a cover housing and a main body affixed to one another for operation. A drive and idler gear may be mounted within a gear chamber in the main body for rotation there about, and inlet fluid may be provided on both the axial and radial surfaces of the drive and idler gear. The cover housing may be outfitted with one pressure relief channel or with two pressure relief channels of different geometric sizes and with different actuation pressures. The drive and/or idler gear may have dimples fashioned on an axial surface thereof, and lubricant troughs may be fashioned at various locations in the main body and/or the cover housing to reduce wear within the pump. | 06-20-2013 |
| 20130202474 | ROTARY PISTON PUMP - The invention relates to a rotary lobe pump ( | 08-08-2013 |
| 20130243636 | FUEL PUMP FOR AN INTERNAL COMBUSTION ENGINE - A fuel pump for a direct injection internal combustion engine having a housing defining a pump chamber. Driven and idler toothed gears are rotatably mounted within the pump chamber so that the driven and idler gears are in mesh with each other at a predetermined location in the pump chamber. A fluid inlet is formed through the housing and open to an inlet subchamber in the pump chamber. A fluid outlet is also formed through the housing and open to an outlet subchamber in the pump chamber. A pressure relief passageway fluidly connects the inlet subchamber to the outlet subchamber and a valve is disposed in series with the pressure relief passageway. A control circuit controls the actuation of the valve to control the pump pressure at the pump outlet. | 09-19-2013 |
| 20130302201 | Gear Pump - A gear pump has a face plate | 11-14-2013 |
| 20140193285 | OPTIMIZED HELIX ANGLE ROTORS FOR ROOTS-STYLE SUPERCHARGER - A Roots-type blower has first and second meshed, lobed rotors disposed in first and second chambers of a housing. Each lobe has first and second axially facing end surfaces defining a twist angle that is a function, at least partially, of the number of lobes on each rotor, and each lobe further defines a helix angle that is a function of the twist angle and an axial length between the first and second axially facing end surfaces of said lobe. The lobes cooperate with an adjacent surface of the housing to define at least one blowhole that defines a control volume, occurs in a cyclic manner, and moves linearly in a direction toward the outlet port. The blowhole provides communication between adjacent control volumes. | 07-10-2014 |
| 20160003240 | OIL PUMP FOR ENGINE - An oil pump includes a pump housing comprising an oil input port formed at one side of the pump housing. An oil output port is formed at another side of the pump housing. An oil flow unit is provided at a center of the pump housing, and the oil flow unit compresses and discharges oil input from the oil input port toward the oil output port. A bypass passage circulates the oil from the oil output port to the oil input port. A pressure control chamber allows the oil to flow through the oil output port and the bypass passage. The pressure control chamber has a plunger that is supported by an elastic body and moves in accordance with oil pressure. A bypass hole is formed at one side of the pressure control chamber and allows the oil passing through the oil output port to flow to the bypass passage when the plunger moves due to the oil pressure. The amount of oil flow increases depending on a movement distance of the plunger. | 01-07-2016 |
| 20160003244 | ECCENTRIC SCREW PUMP WITH OVERPRESSURE PROTECTION - An eccentric screw pump comprising an outer part ( | 01-07-2016 |
| 20160115956 | COMPRESSOR SYSTEM AND COMPRESSOR - A unique compressor system may include a compressor having a compressor housing. The compressor housing may include an oil drainage passage formed therein. The passage may be configured to drain oil from bearings and other oil-lubricated components of the compressor. The compressor may be coupled to a gearbox or an oil tank. The gearbox or oil tank may include a passage that is in fluid communication with the oil drainage passage. The gearbox or oil tank passage may be operative to receive the drained oil and to direct the drained oil to an oil tank. | 04-28-2016 |
| 20160138588 | PUMP INTEGRATED WITH TWO INDEPENDENTLY DRIVEN PRIME MOVERS - A pump having at least two fluid drivers and a method of delivering fluid from an inlet of the pump to an outlet of the pump using the at least two fluid drivers. Each of the fluid drives includes a prime mover and a fluid displacement member. The prime mover drives the fluid displacement member to transfer fluid. The fluid drivers are independently operated. However, the fluid drivers are operated such that contact between the fluid drivers is synchronized. That is, operation of the fluid drivers is synchronized such that the fluid displacement member in each fluid driver makes contact with another fluid displacement member. The contact can include at least one contact point, contact line, or contact area. | 05-19-2016 |
| 418206200 | With timing gear adjustment or arrangement | 1 |
| 20160003250 | AXIAL SEAL FOR ROOTS-STYLE SUPERCHARGER - A blower housing including a first and second rotor assembly such that the first rotor assembly includes a first rotor and a first shaft and the second rotor assembly includes a second rotor and a second shaft. The first and second rotors each have a plurality of lobes. Each first and second rotor includes an axial sealing extension that can be constructed to extend axially into the shaft opening. The axial sealing extension can include a radially outwardly facing sealing surface that opposes a radially inwardly facing sealing surface defined within the shaft opening. The radially outwardly facing sealing surface and the radially inwardly facing sealing surface can be configured to cooperate to form a radial sealing interface that extends around an axis. The radial sealing interface can include a radial seal clearance defined between the radially outwardly facing sealing surface and the radially inwardly facing sealing surface. | 01-07-2016 |
| 418206300 | With heating or cooling | 2 |
| 20090191083 | Rotary blower with isothermal air jacket - A rotary blower with an isothermal air jacket having multiple interconnected and synchronized parallel multi-lobe rotors with the same number of lobes for propelling flow from a suction port to a discharge port of an inner casing without internal compression. The isothermal air jacket is shaped to surround the blower outer body, but is oversized to provide adequate flow spaces with outer skin of the blower to enable an effective cooling of the outlet casing and an effective heating of the inlet casing so that the whole casing temperature will tend to be more uniform and isothermal, resulting in a blower with less vibration, lower noise and longer blower life. | 07-30-2009 |
| 20100233006 | SCREW-TYPE FLUID MACHINE - A vacuum pump includes rotary shafts connected to a pair of screw-type rotors, respectively, and a pair of shaft retainers extending in the housing. Each shaft retainer supports the corresponding rotary shaft by means of a proximal bearing portion and a distal bearing portion. Each pair of the proximal and distal bearing portions are fixed in the axial direction with respect to the corresponding rotary shaft and shaft retainer. Lubricant oil is stored in an oil storage space in a gear case attached to the housing. A cooling water passage through which cooling water to cool the lubricant oil passes is formed in the gear case. A controller controls the flow rate of the cooling fluid, so that the temperature of the lubricant oil in the oil storage space is kept constant. With this configuration, when the bearing portions are fixed in the axial direction with respect to the rotary shafts and the shaft retainers, it is possible to prevent load from being applied to the bearing portions in the axial direction. | 09-16-2010 |
| 418206400 | Having specific inlet or outlet port shape | 2 |
| 20120177526 | AIR COMPRESSOR - An air compressor includes a compression mechanism for compressing intake air and discharging the compressed air, and an intake chamber portion through which intake air is introduced into the compression mechanism. The intake chamber portion has an inlet of intake air and an outlet connected to the compression mechanism. The intake chamber portion is integrated with the compression mechanism. The intake chamber portion has therein a partition wall extending in the direction from the inlet toward the outlet to form plural flow passages in the intake chamber portion. The plural flow passages have different flow path lengths and connect between the inlet and the outlet. | 07-12-2012 |
| 20140099227 | PUMP APPARATUS - A pump apparatus includes: a housing; a pump unit; a suction passage; a discharge passage member including a discharge hydraulic passage which is formed therein, and which is arranged to discharge the hydraulic fluid pressurized by the pump unit to an outside of the housing; a first discharge passage insertion hole which is formed in the pump unit, and into which the discharge passage member is inserted through an elastic member; a second discharge passage insertion hole which is formed in the housing, and into which the discharge passage member is inserted through an elastic member; and an axial position adjusting mechanism arranged to adjust an axial position of the discharge passage member within the first discharge passage insertion hole and the second discharge passage insertion hole. | 04-10-2014 |
| 418206500 | Having specific rotor or tooth shape | 13 |
| 20090060770 | GEAR PUMP - A gear pump applicable for feeding a high-pressure and high-viscosity fluid, such as a molten resin is provided. In the gear pump | 03-05-2009 |
| 20090123319 | "ROTARY PISTON PUMP COMPRISING A PUMP HOUSING AND TWO DOUBLE BLADED ROTARY PISTONS" - The invention relates to a rotary piston pump comprising a medium inlet, a medium outlet, and two rotary pistons. Each rotary piston has an outer contour with a constant radius R around the axis thereof, in two opposing peripheral regions, respectively over a peripheral angular region α, and, in the other peripheral regions, respectively a continuous contour with radii which are measured from the axis and are shorter than the radius R. The rotary pistons are helicoidal, respectively one front side of each rotary piston being rotated in relation to the other front side by a rotary angle β. The medium inlet and the medium outlet have a rectangular cross-section with two axially parallel edges and two edges extending at right angles to said parallel edges. The angles α and β are measured and adapted to each other in such a way that an imaginary sealing line extending parallel to the respective axis extends over the entire axial length of each rotary piston inside the peripheral region thereof with the other contour and contact radius R. | 05-14-2009 |
| 20090142213 | ROOTS-TYPE BLOWER REDUCED ACOUSTIC SIGNATURE METHOD AND APPARATUS - A Roots-type blower with helical cycloidal rotors features relief recesses in the chamber walls, isolated from the input and output ports. The relief recesses counter variation in leakback flow with angular position intrinsic to helical cycloidal rotors, attenuating a noise source. | 06-04-2009 |
| 20100158739 | GEAR PUMP WITH SLOTS IN TEETH TO REDUCE CAVITATION - A gear pump comprises a drive gear being mounted for rotation about a first axis and having a plurality of gear teeth at a radially outer location. A driven gear is mounted for rotation about a second axis, and having a plurality of teeth at a radially outer location. The drive gear teeth engage the driven gear teeth at a contact face to cause the driven gear to rotate. Slots are formed in the contact face of one of the drive and driven gear teeth. | 06-24-2010 |
| 20100254846 | ROOTS TYPE FLUID MACHINE - A roots type fluid machine includes suction and discharge ports, rotary shafts and a pair of rotors. The rotor has a number n of lobe and valley portions with apex and bottom ends. The lobe portions are located on imaginary lines extending radially from an axis of the rotary shaft. The outer surface of each one of the rotors is generated by rotating an outline of the rotor including an arc and involute and envelope curves around and moving the outline in the direction of the axis. The arc has a radius R and a center located on the imaginary line. The involute curve is formed by an imaginary base circle having a radius r and a center located on the axis. The envelope curve is formed by an arc having a radius R. The number n is four or more. A torsional angle β is over | 10-07-2010 |
| 20110027118 | DEVICE WITH ROTARY PISTONS THAT CAN BE USED AS A COMPRESSOR, A PUMP, A VACUUM PUMP, A TURBINE, A MOTOR AND AS OTHER DRIVING AND DRIVEN HYDRAULIC-PNEUMATIC MACHINES - Device with rotary pistons that can be used as a compressor, a pump, a vacuum pump, a turbine, a motor and as other driving and driven hydraulic pneumatic machines, according to the invention, is used in several embodiments so as to enable its use with all hydraulic pneumatic machines and engines, by fitting constructional assemblies with gears and rotary pistons. | 02-03-2011 |
| 20110223051 | TOOTH PROFILE FOR ROTORS OF POSITIVE DISPLACEMENT EXTERNAL GEAR PUMPS - The present invention deals with the analytical definition of a tooth profile for rotors used in gear pumps. The purpose is to obtain a pump characterised by noiseless operation, minimisation of vibrations and pressure overoscillations generated in operating conditions at the beginning and end of life, and high specific displacement, in such a way to increase the delivery of the pump in given volume conditions. This profile is characterised by an active profile of the tooth flanks with involute stub-tooth with transverse contact ratio (ε | 09-15-2011 |
| 20110300014 | ROTARY LOBE BLOWER (PUMP) OR VACUUM PUMP WITH A SHUNT PULSATION TRAP - A shunt pulsation trap for a rotary lobe blower (pump) or vacuum pump reduces pulsation, NVH and improves efficiency without increasing overall size of the blower or pump. Generally, a rotary lobe blower (pump) or vacuum pump with the shunt pulsation trap has a pair of interconnected and synchronized parallel multi-lobe rotors housed in a transfer chamber with the same number of lobes for propelling flow from a suction port to a discharge port of the transfer chamber without internal compression. The shunt pulsation trap comprises an inner casing as an integral part of the transfer chamber, and an outer casing oversized surrounding the inner casing, therein housed various pulsation dampening means or pulsation energy recovery means or pulsation containment means, at least one injection port (trap inlet) branching off from the transfer chamber into the pulsation trap chamber and at least one feedback port (trap outlet) communicating with the blower outlet pressure. | 12-08-2011 |
| 20120156080 | Hydraulic Toothed Wheel Machine - A toothed wheel machine including a housing for receiving two meshing toothed wheels. The toothed wheels are axially mounted in a sliding manner by axial surfaces between bearing bodies received in the housing, and radially by a bearing shaft received in the bearing bodies. Hydraulic mechanical forces are generated during the operation of the toothed wheel machine, an axial force component of the forces acting on each toothed wheel in the same axial direction. In order to counteract said axial force component, a pressure field is provided between at least one axial surface of one of the toothed wheels in the direction of the action of the axial force component, and the bearing body adjacent to the at least one axial surface. | 06-21-2012 |
| 20140271314 | Gear Wheel with Profile Capable of Meshing with Semi-Encapsulation in a Geared Hydraulic Apparatus - A gear wheel comprising a plurality of helical teeth, each helical tooth of the gear wheel having a tooth profile meshing with semi-encapsulation in a geared hydraulic apparatus. Each tooth having a profile which falls within a band of tolerance of +− 1/15 of the depth of a nominal tooth defined by a spline function interpolating a plurality of node points having pre-established coordinates {X,Y} with their origin on the gear wheel center. | 09-18-2014 |
| 20150330387 | GEARED HYDRAULIC MACHINE AND RELATIVE GEAR WHEEL - A gear wheel for gear pumps/motors including a plurality of asymmetrical teeth, each tooth including a driving side with a convex shape and mating with a corresponding convex side of a counter-wheel and a discharge side defined, in most of its length, as a cavity of a convex profile. The discharge side is configured so that the radius passing through a tip of the teeth is substantially at least tangent to the discharge side, or intersects the discharge side. | 11-19-2015 |
| 20160003248 | LOW INERTIA LAMINATED ROTOR - A rotor assembly having a plurality of rotor plates mounted to a shaft, and methods of construction for a rotor assembly are disclosed. Each rotor plate in the assembly may be provided with a central opening extending between the first and second sides through which the shaft extends. In one aspect, the rotor plates are provided with a plurality of lobes extending away from the central opening, wherein each of the lobes has a lobe opening extending through the thickness of the plates. In one embodiment, the rotor plates are rotationally stacked to form a helical rotor. | 01-07-2016 |
| 20160097390 | ROTOR FOR PUMP - The present invention relates to a rotor for a vacuum pump | 04-07-2016 |
| 418206600 | With sealing means | 10 |
| 20090220371 | METHODS FOR DIMENSIONAL RESTORATION OF ROOTS TYPE BLOWER ROTORS, RESTORED ROTORS, AND APPARATUS HAVING RESTORED ROTOR - Method includes applying additive material to a pre-selected region of a rotor for use in a Roots type blower assembly. The additive material restores structural dimension to provide measured rotor-to-rotor clearance and/or rotor-to-case clearance within the predetermined clearance range. The additive material may be an epoxy paint material or a plating material. The method includes measuring the clearances, preparing the rotor surface, applying the additive material, and re-measuring the clearance. The restored rotor may be returned to service, for example, in a locomotive diesel. The disclosure also provides a restored rotor including at least one region comprising the additive material. Additionally, the disclosure provides an apparatus including a dimensionally restored rotor. | 09-03-2009 |
| 20100047104 | FLUID MACHINE - A housing ( | 02-25-2010 |
| 20100150765 | Interlocking Device for Holding Body and Flange of Machines Using Bean-Shaped Dowels - An interlocking device for rigidly holding together the body ( | 06-17-2010 |
| 20100196186 | GEAR PUMP - The invention relates to a gear pump having two meshing gear wheels configured of a driven gear wheel and a gear wheel moving along with the same. A rotatably supported drive shaft is provided for driving the gear wheel, the shaft being held in the pump housing by bearing means. A sealing means is associated with the drive shaft at the circumference between the gear wheel and the bearing means, the sealing means comprising a pressure ring resting against a face of the gear wheel. In order to prevent the gear wheel in the pump housing from starting to run, a second sealing means having a second pressure ring is disposed on the opposite face of the gear wheel at the circumference of the drive shaft between a second bearing means and the gear wheel, wherein both pressure rings have a sealing shoulder opposite the gear wheel, the shoulder being pressed against the face of the gear wheel under the action of a spring means. | 08-05-2010 |
| 20100226808 | MULTI STAGE, CLAM SHELL VACUUM PUMP - A multi-stage, clam shell, vacuum pump comprises two housing components ( | 09-09-2010 |
| 20110135528 | OIL-FREE SCREW COMPRESSOR - A screw compressor ( | 06-09-2011 |
| 20140294648 | Apparatus for Sealing a Pump Chamber of a Rotary Lobe Pump, and a Rotary Lobe Pump Having Said Apparatus - The invention relates to an apparatus for sealing a pump chamber of a rotary lobe pump vis-a-vis a fluid-free region of the rotary lobe pump, in particular in the region of a shaft duct, wherein the apparatus has two or more sealing elements, which can be disposed adjacent to a front side of a rotary piston disposed on a shaft in the pump chamber of the rotary lobe pump in such a way that a labyrinth gap extends between the sealing elements, said labyrinth gap being arranged in a radial direction relative to the shaft and in an axial direction in order to extend the seal land. According to the invention, the seal land is larger in a radial direction relative to the shaft than the seal land in an axial direction relative to the shaft. | 10-02-2014 |
| 20140294649 | Pump Device - In a hollow seal member kept in abutted-engagement with a shaft hole formed in a housing via an elastic body and kept in sliding-contact with an outer circumference of a drive shaft for sealing against a leakage of fluid from a pump chamber, the seal member is provided with a seal part formed within an area at one end and kept in sliding-contact with the outer circumference of the drive shaft over a given hollow inner circumferential surface, and a rotation-stopping part formed within an area at the other end for restricting a movement of the seal member in a rotation direction of the drive shaft. A rotational resistance of the rotation-stopping part to the drive shaft is set to be less than a rotational resistance of the seal part. | 10-02-2014 |
| 20140348687 | Rotary Piston Pump - A rotary piston pump with at least two double- or multi-lobe rotary pistons rotating in opposite directions, the drive shafts whereof include seals, wherein the seals are constituted as slip ring seals or lip seals or stuffing-box seals, which in each case are disposed on the shaft shoulder belonging to the respective rotary piston, and one slip ring per seal is provided with a locking device, which includes a large number of fixing positions. The seals are pushed onto a tubular shoulder of the rotary piston, the rotary piston is introduced into the pump housing, the securing element is connected to the slip ring seal in a form-fit manner by rotation of the rotary piston and the shaft shoulder is then rigidly connected to the drive shaft. | 11-27-2014 |
| 20150369242 | Internal Gear Pump - An internal gear pump for a slip-controlled hydraulic vehicle braking system includes a pump shaft that is mounted rotatably on one side of a pinion and a ring gear that is mounted rotatably in an axial disk. The axial disk seals off the pinion and the ring gear at the sides. | 12-24-2015 |
| 418206700 | With bearings | 9 |
| 20080240968 | Low Cost Gear Fuel Pump - The present invention is directed to a gear pump having a housing ( | 10-02-2008 |
| 20090148333 | Gear pump cavitation reduction - A gear pump for operating with reduced likelihood of cavitation occurrences in the fluid being pumped thereby, the pump having a pair of gears each supported on a corresponding one of a pair of gear with teeth provided in each gear that mesh with at least one tooth of the other when such teeth have been rotated into a meshing region in the gear plane, and with one of the gear shafts being rotatably connectable to a motor. Bearing structures rotatably support corresponding ones of each of the pair of gear shafts with the bearing structures having bearing surfaces adjacent those gear sides. A pressurized fluid passageway is provided in at least one of the bearing structures across from the meshing region and extending between surface openings at the bearing surface of that bearing structure that are positioned on opposite sides of an alignment axis in that bearing surface, the surface openings being separated from one another by at least the width of a tooth provided in the pair of gears. | 06-11-2009 |
| 20100233007 | Gear Pump - A nonmetallic pump with a gear pump assembly having an adapter spool mounted to an electric motor. The pump assembly is designed to reduce manufacturing costs and to provide access for many service and maintenance tasks to be performed without breaking any of the pipe connections. The pump assembly also includes a splined shaft system and a lubricating fluid circulation system with spiral grooves located inside a pair of bearings disposed on opposite sides of the gear flights. The assembly also includes a replaceable precision liner that surrounds the gear flights to maintain a tight tolerance for optimal performance of the pump. Also, an O-ring disposed inside the front cover of the assembly provides for operation of the pump over a wide temperature variation with relatively loose manufacturing tolerances. | 09-16-2010 |
| 20110033330 | GEAR PUMP FOR VISCOUS MEDIA - A gear pump for moving elastomeric material includes a housing, a first beveled gear, a second beveled gear, and a drive mechanism. The housing has first and second side plates, an internal gear chamber, a material inlet communicating with the chamber, and a material outlet communicating with the chamber. The first beveled gear is disposed within the chamber. The first beveled gear is rotatably mounted about a first axis of rotation to the housing. The second beveled gear is disposed within the chamber. The second beveled gear is rotatably mounted about a second axis of rotation to the housing. The second beveled gear engages the first beveled gear such that rotation of the first beveled gear in a first direction affects rotation of the second beveled gear in a second opposite direction. The first axis of rotation is parallel to the second axis of rotation. The drive mechanism directly drives rotation of the first beveled gear and simultaneously and indirectly drives rotation of the second beveled gear. The rotation of the first and second beveled gears transports the elastomeric material from the material inlet to the material outlet. | 02-10-2011 |
| 20110182762 | Screw-Type Compressor - In order to improve a screw compressor comprising an outer housing, a compressor screw housing which is arranged in the outer housing and in which rotor bores for screw rotors are arranged, a drive arranged in the outer housing on one side of the compressor screw housing, a bearing housing arranged in the outer housing on a side of the compressor screw housing located opposite the drive and a sound damping device which is arranged within the outer housing and has compressed working medium flowing through it, in such a manner that the working medium leaving the screw compressor carries as little lubricant as possible along with it, it is suggested that the sound damping device guide the compressed working medium by means of a flow guide in an interior space as a circulating flow circulating around an axis and that lubricant be separated from the circulating flow of the working medium as a result of centrifugal forces. | 07-28-2011 |
| 20120183427 | LUBE SPACER BEARING WITH PRESSURE LOADING CHANNEL - A lube spacer bearing for a lube and scavenge pump includes a bearing body defining a bore with a central axis. The bearing body has a first axial side, a second axial side, an outer radial side, and an inner radial side at the bore. The outer radial side includes an arcuate portion. A channel is defined in the arcuate portion of the outer radial side and extends a circumferential length about the outer radial side. The channel has a channel width (CW) defined between a first channel wall and a second channel wall and a bearing length (BL) defined between the first axial side and the second axial side. A ratio of CW/BL is between 0.45 and 0.70. | 07-19-2012 |
| 20120219449 | BEARING FACE GEOMETRY FOR GEAR PUMP - A bearing includes a bridge land geometry having a finger cut that defines a width ISW, a center of the width ISW displaced from a shaft axis a radial distance ISR, a ratio of ISW/ISR between 0.074-0.293, to reduce cavitation and pressure ripple. | 08-30-2012 |
| 20160076373 | ROTARY VOLUMETRIC MACHINE WITH THREE PISTONS - The invention concerns a rotary volumetric machine with three pistons comprising an enclosure forming a stator in which there moves a rotating assembly forming a rotor comprising a crankshaft that mechanically engages with the pistons, the rotating assembly defining, inside said enclosure, six chambers of variable volume of which the volume varies when the rotating assembly rotates, each of the pistons delimiting, with the enclosure, a variable volume chamber called the extrados chamber and two consecutive pistons delimiting, with the enclosure and the crankshaft, a variable-volume chamber called the intrados chamber. The geometry of the pistons and of the crankshaft is designed such that each intrados chamber has a capacity greater than or equal to the capacity of the extrados chambers. | 03-17-2016 |
| 20160123390 | GEAR PUMP BEARINGS WITH HYBRID PADS - A gear pump includes a drive gear mounted to a first gear shaft, a driven gear meshable with the drive gear, a plurality of journal bearings, and a first porting path. The first porting path is adapted to provide high pressure fluid communication from a discharge of the gear pump to a first hybrid pad location for a first journal bearing selected from the plurality of journal bearings, the first hybrid pad location circumferentially adjacent to a first fluid film location. Each location is disposed annularly between an inner surface of the first journal bearing, and an outer surface of the first gear shaft or second gear shaft corresponding to the first journal bearing. | 05-05-2016 |
| 418206800 | With lubrication | 2 |
| 20080226485 | ROTATION BODY CLEANING UNIT AND VACUUM PUMP HAVING THE SAME - Provided is a vacuum pump having a rotation body cleaning unit. The vacuum pump includes a case provided with rotation guide holes at opposite end parts. The case includes a rotation body placed inside the case and including a rotation shaft having opposite ends rotatably supported by the rotation guide holes and a number of lobes provided in the rotation shaft at predetermined intervals. Further, a cleaning part is supported by the case and placed in a space between the lobes and cleans the rotation body. | 09-18-2008 |
| 20150037194 | OIL PUMP - An oil pump has a pump body, an outer rotor, and an inner rotor. The pump body includes a rotor chamber, an inlet port and an outlet port formed in the rotor chamber, an inlet passage communicating with the inlet port, an outlet passage communicating with the outlet port, a relief valve, a relief chamber formed on a discharge side of the relief valve, and an oil return passage formed from the relief chamber to the inlet passage. The outer rotor is supported by the inner circumferential support wall of the rotor chamber. The oil return passage is formed in the inner circumferential support wall as a groove-like recess and opens along an outer circumferential surface of the outer rotor. | 02-05-2015 |
| 418206900 | Using specific material | 3 |
| 20080219877 | Rotor, a Method for Producing Such Rotor and a Pump Comprising Such Rotor - The invention relates to a rotor for a positive displacement rotary pump. The rotor comprises a hub with an aperture and a centre axis through said aperture and at least 2 lobes radially extending from said hub and in a direction essentially perpendicular to the axis of said hub. The rotor comprises a core of a first polymer material and a cover of a second polymer material, which second polymer material has a hardness which is lower than the first polymer material. The first and the second polymer materials are connected to each other. The hub or the major part of the hub is preferably provided by the core, whereas at least a part of the lobes is provided by the cover. The invention also relates to a method of providing the rotor and a pump comprising the rotor. The rotor has a high durability and provides an excellent sealing towards inner surface sections of the pumping house as well as towards an engaged rotor. | 09-11-2008 |
| 20110243782 | Soft Serve Ice Cream Pump Enhancers - The present invention relates to a pump enhancer that allows the pump in the soft ice cream machine to operate at maximum capacity. The preferred pump enhancer is made of NSF approved Virgin Teflon film and is used in a two-gear pump soft ice cream machines to take up the space of the pump cover that wears out annually, and thus increasing the efficiency of the soft serve ice cream machines and produce more product (ice cream) per box of ice cream mix. The spacer also allows the pump to put maximum air into the product and is cost saving. The pump enhancer can be installed during rebuilding of pump or during the initial manufacture thereof. | 10-06-2011 |
| 20120263618 | Bi-Metal Pump Gear - A pump gear is provided. The pump gear includes a first shaft portion having a first end and a second end with an integral gear portion formed therebetween. The first shaft portion is made from a first tool steel material. A second shaft portion having a third end brazed to the first end. The second shaft portion has at least one integral drive spline formed adjacent one end. The second shaft portion is made from a second tool material. The first tool steel material has a vanadium content by weight of greater than | 10-18-2012 |
