| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 418140000 |
Seal element between working member and cylinder
| 39 |
| 418136000 |
Seal element between working member and vane
| 10 |
| 418131000 |
Axially movable end wall or end wall portion
| 10 |
| 418106000 |
Vane position adjustment
| 7 |
| 418125000 |
Seal on cylinder engaging rotary member separates inlet and outlet ports
| 6 |
| 418145000 |
Seal element between vane and cylinder | 5 |
| 20130022487 | VANE PUMP - The invention relates to a vane pump comprising a pump housing that has a sleeve-shaped housing body, a bottom, and a cover, with the bottom and cover axially closing the housing body. The vane pump also has a rotor, which lies eccentrically in the housing body and which is rotatably mounted in the bottom and the cover, and one or more vanes which are movably mounted in the rotor in an axial direction. Each vane has bearing pins on the axial end faces thereof, with the bearing pins engaging in the bottom and the cover. | 01-24-2013 |
| 20090028738 | Rotor - A rotor for rotary engines and compressors is disclosed. The rotor of the present invention includes a first body unit ( | 01-29-2009 |
| 20110165007 | ROTARY ENGINE VANE HEAD METHOD AND APPARATUS - A rotary machine is described with a vane carried by a rotor in a housing. The vane includes: a central vane axis extending radially outward along a y-axis from a center of the rotor through the vane to the housing. A centrifugal force of the vane against the housing is primarily distributed with a first sealing element mounted on an end of the vane, such as a rotatable element supported by a rigid support. The rigid structure of the first sealing element facilitates use of a second flexible sealing element mounted on the vane end. The second flexible sealing element performs as a sliding seal between a trailing expansion chamber and a leading expansion chamber on opposite sides of the vane. The rigid seal and the flexible sliding seal typically function independently of each other as separate constituents of the tip or end of a given vane. | 07-07-2011 |
| 20110217200 | Vacuum pump - The invention relates to a vacuum pump, in particular a vane cell pump, having a housing in which a suction space is provided, and a housing passage opening into the suction space, wherein a suction non-return valve opening to the outside or into an external vacuum space is arranged in the housing passage, said valve being accommodated in a pot-shaped housing, the pot-shaped housing having a housing bottom and a housing jacket, wherein the housing bottom is integral with the housing jacket. | 09-08-2011 |
| 20150017046 | Rotary Compressor Having Gate Axially Movable With Respect To Rotor - A rotary compressor having a housing and a rotor positioned within an internal cavity of the housing. The rotor being configured to rotate about a rotor axis of rotation eccentric to a housing longitudinal axis. A gate is also provided that is slidably mounted therewith the rotor and movable axially about and between a first position, in which a distal end of the gate is positioned at a first distance from the peripheral surface of the rotor, and a second position, in which the distal end of the gate is positioned at a second distance from the peripheral surface of the rotor. The distal end of the gate being constrained to be spaced proximate from the inner wall surface of the housing as the rotor rotates about the rotor axis of rotation. | 01-15-2015 |
| 418139000 |
Seal element between abutment and cylinder or working member | 4 |
| 20090232689 | SUPERCHARGER WITH OUTLET BARS FOR ROTOR TIP SEAL SUPPORT - The invention is to reduce flutter and wear and improve the serviceability and wear life of tip seals for roots blower and screw type compressor superchargers where used for improved supercharger output and efficiency. As the seals travel over the outlet opening, the seals move outward in their slots, leading to flutter which may shorten their useful lives. As each seal reaches the center of the outlet opening, it is forced back into its groove by engaging a valley of the mating rotor with the likelihood of increased wear. The invention provides longitudinally spaced support bars extending laterally across the opening in the directions of rotation of the rotors. The support bars have inner surfaces machined with the associated rotor cavity bores and thus smoothly support the seals as they ride over the support surfaces. The support reduces the flexing of the seals and the resultant wear. Each seal contacts a support bar only during inward motion to the center of the opening where the machined bores intersect and the seal is moving into a valley of the associated rotor of the pair. To reduce edge effect wear of the seals, the width of the support bars may be made narrower from the outer edges of the outlet opening to the center, where each seal loses contact with its respective support bar. | 09-17-2009 |
| 20090285709 | Vane pump - A vane pump comprising a case, a rotor disposed in the case, the rotor having a bore, a plurality of vanes radially moveable with respect to the rotor extend from the rotor, a drive shaft engaged with the bore, a second shaft fixedly connected to the case and extending from the case to slidingly engage the bore, a land extending from each end of the rotor, each land cooperating with the case to seal a fluid flow, and each land further axially controlling a rotor position within the case by a sliding engagement, and the drive shaft retainable in a predetermined position with respect to the case. | 11-19-2009 |
| 20100215538 | Fuel pump - A fuel pump includes a housing having a cavity. The cavity has a rear surface, and a drive gear and driven gear are disposed in the cavity and in mesh with one another for pressurizing fluid. A floating wear plate and a fixed wear plate are disposed in the cavity and are in contact with the drive gear and the driven gear. A flow orifice is formed as part of the floating wear plate, and a portion of the pressurized fluid flows through the flow orifice to an area between the rear surface of the cavity and the floating wear plate, causing the floating wear plate to apply force to the drive gear and driven gear, and causing the drive gear and driven gear to apply force to the fixed wear plate, thereby compensating for any wear of the drive gear, driven gear, and wear plates. | 08-26-2010 |
| 20160010643 | PUMPS | 01-14-2016 |
| 418107000 |
By changing working member or cylinder relative position | 3 |
| 20100124512 | Method for timing a polymer pump containing polymer - A method for restoring the registry of opposed shafts that carry meshing pump teeth inside a polymer pump that contains polymer without removing polymer from within the pump, the method using an asymmetric pattern of apertures in the shaft ends and a template having a pattern of holes that matches the pattern of apertures, and dowels that closely fit the holes and apertures. | 05-20-2010 |
| 20140134035 | TROCHOIDAL ROTARY DEVICE - Embodiments of the present disclosure are directed toward a system including a trochoidal rotary device. The trochoidal rotary device includes a housing comprising an inner surface, a rotor having at least one bearing recess, a shaft eccentrically mounted to the rotor, wherein the shaft and the rotor are integrated with one another, and at least one bearing disposed between the bearing recess of the rotor and the inner surface of the hollow housing, wherein at least one of the inner surface of the hollow housing, the bearing recess of the rotor, and the at least one bearing comprise a bearing interface comprises a surface treatment. | 05-15-2014 |
| 20110142705 | ROTARY COMPRESSOR - A rotary compressor is provided. The rotary compressor may include a plurality of cylinders each having a suction port formed such that an intersection of a center line of the suction port and a center line of a vane slot is positioned at a predetermined interval closer to the vane slot than to an intersection between a center of an inner diameter of the cylinder and the center line of the vane slot. A proximal end of the suction port may be formed in the vicinity of the vane slot so as to advance a compression start angle of a compression space and reduce a dead volume between the vane slot and the suction port, thus improving compressor performance. | 06-16-2011 |
| 418111000 |
By axially relatively moving vane or abutment sections | 3 |
| 20090155113 | VARIABLE DELIVERY VANE OIL PUMP - A variable delivery vane oil pump, is provided with a stator ( | 06-18-2009 |
| 20100150762 | SYSTEM FOR SEALING THE PISTON OF ROTARY PISTON MACHINES - A sealing system of rotary piston machines, the rotor excludes rotor discs which are arranged next to one another, and which are seated on the common rotor axle and are pressed apart from one another by acting spring and/or gas forces in the joints between the discs in such a way that the end sides of the discs which point towards the side walls of the housing bear sealingly against the latter and thus prevent the access of the medium to the axles. Assemblies comprising movable shaped lamellae which adapt to the changing joint widths and prevent an inner flow around the rotor are present in the part joints between the discs. | 06-17-2010 |
| 20120034121 | BALANCE PLATE ASSEMBLY FOR A FLUID DEVICE - A fluid device includes a displacement assembly and a balance plate assembly disposed adjacent to the displacement assembly. The displacement assembly includes a ring and a rotor disposed in a bore of the ring. The ring and rotor cooperatively define a plurality of volume chambers. The balance plate assembly includes a housing that defines a cavity. A balance plate is disposed in the cavity. The balance plate includes a first end surface and an oppositely disposed second end surface. The balance plate is adapted to move axially between a first position in which the second end surface of balance plate abuts a first end face of the ring to a second position in which the second surface of the balance plate is recessed in the cavity. | 02-09-2012 |
| 418112000 |
Seal on working member periphery separates inlet and outlet ports | 3 |
| 20140065002 | Positive Displacement Pump With Improved Sealing Arrangement and Related Method of Making - A rotary positive displacement pump has a front-loading seal arrangement to better accommodate servicing and cleaning of the pump body. The pump includes a sliding seal subassembly disposed in a volume between a central portion of a rotor that is received on a shaft of a gear case and the hub of the pump body. A related method of modifying a rotary positive displacement pump enables the transformation conventional pumps with a rear-side seal arrangement to be transformed into a pump having a front-loading seal arrangement. In addition to the reduction of a dead zone in which turbulent flow does not occur by inclusion of the sliding seal subassembly, other modifications to the pump body to improve the ability of the pump to be cleaned in place. | 03-06-2014 |
| 20140140879 | ROTARY MECHANISM WITH ARTICULATING ROTOR - The rotary mechanism with articulating rotor may be adapted as a pump or compressor when external power is applied to its shaft, as a motor when differential pressure is applied to its inlet and outlet ports, or as an internal combustion engine when provided with fuel, air, and ignition source. The mechanism includes an internal chamber having major and minor diameters. An articulating rotor having four linked segments rotates therein. The segments allow the rotor to articulate between square and rhomboid shapes as it rotates within the chamber, the rotor segments forming variable volume chamber portions as they rotate. The rotor segments are linked to the central shaft either by a transverse arm rotationally affixed to the central shaft and to diametrically opposed rotor segments, or by telescoping rods connecting the linked ends of the rotor segments to the central shaft. | 05-22-2014 |
| 20150337835 | PUMP - A pump includes: a housing in which a pump chamber accommodating an inner rotor and an outer rotor is formed in a pump chamber formation surface, and an O-ring groove is formed around the pump chamber; an O-ring that is placed in the O-ring groove; and a plate that is attached to the pump chamber formation surface and closely contacts the O-ring to close the pump chamber. Inter-hole grooves connecting to an outer edge of the pump chamber formation surface are formed around the O-ring groove. | 11-26-2015 |
| 418105000 |
Abutment position adjustment | 2 |
| 20090169407 | Rotor Compressor - A rotary piston compressor comprises a cylinder block ( | 07-02-2009 |
| 20130202471 | CYLINDER DIVIDING MECHANISM OF A PNEUMATIC TOOL - In a cylinder dividing mechanism of a pneumatic tool, the first and second air pressure driving spaces are formed in the chamber, the first and second external channels are set externally on the circumferential wall, the first external channel is connected with the first air intake and air intake/exhaust dividing controller, and the second external channel is connected with the second air intake and air intake/exhaust dividing controller. As such, a single chamber is provided with two air pressure driving spaces for synchronous compression and driving of the rotor. The driving torsion for the pneumatic tool could be multiplied without need of increasing the volume of the chamber of the cylinder to cater for the need of the users with improved applicability. | 08-08-2013 |
| 418110000 |
By axially relatively moving working member sections | 1 |
| 20090220370 | GAS COMPRESSOR - A compressor includes a compression mechanism for suctioning gas through a suction path to compress the gas and discharging the compressed gas and a check valve for preventing backward-flow of the gas in the suction path. The check valve includes an accommodation hole (its one end is opened toward the suction path and its another end is functioned as a reservoir), a valving element accommodated within the accommodation hole movably, a valve seat provided at the opened end of the accommodation hole for closing the suction path while the valving element is pressed thereonto and an urging component for urging the valving element toward the valve seat. A release groove is grooved on an inner surface of the accommodation hole. The reservoir is communicated with the suction path through the release groove. The compressor can reduce machining cost, component count and weight in respect to the check valve. | 09-03-2009 |
| Entries |
| Document | Title | Date |
|---|
| 20080219875 | Magnetic drive vane pump - A magnet drive rotary vane pump has a casing with a pump cavity. A rotor carrying a plurality of vanes is disposed within the pump cavity to be rotatable about an eccentric axis with respect to the pump cavity for drawing the fluid into the pump cavity and expelling it out of the pump cavity. The rotor is configured to have a rotor magnet which is magnetically coupled to a stator magnet mounted on the casing outwardly of the pump cavity for driving the rotor. The rotor magnet is configured to have its major portion disposed in an overlapping relation with the stator magnet. Thus, the rotor magnet can be mechanically isolated from the stator magnet disposed outside of the casing to establish a sealless coupling therebetween for realizing leakage free pump. | 09-11-2008 |
| 20080232993 | Fastener member and gas compressor using the same - In a gas compressor, a fastener part is fastened by a fastener member comprised of a bolt coated with a zincate bath and a gasket, any leakage from the fastener member is prevented, the gas compressor including a case | 09-25-2008 |
| 20080240963 | ROTOR SHAFT SEALING STRUCTURE FOR OIL-FREE ROTARY COMPRESSOR - A rotor shaft sealing structure of an oil-free rotary compressor is provided, with which is reduced a risk of occurrence of lubrication oil intrusion into the compression chamber ( | 10-02-2008 |
| 20080240964 | SHAFT SEAL DEVICE FOR OIL-FREE ROTARY COMPRESSOR - A shaft seal device is provided, with which an optimum radial clearance is always maintained between the inner circumferential surface of a carbon ring and an outer circumferential surface of a rotor shaft sleeve when temperature thereof varies in operation of the oil-free rotary compressor, and gas leak through the radial clearance can be suppressed to a minimum not influenced by operation condition of the compressor and intrusion of lubricating oil into the rotor chamber is prevented. As a result, an oil-free rotary compressor can be operated to discharge clean compressed gas not contaminated with lubrication oil. The shaft seal device to be located between the rotor chamber and rotor shaft bearing with a very small radial clearance retained between the inside surface of the shaft seal device and the outer surface of the rotor shaft sleeve | 10-02-2008 |
| 20080253914 | LIQUID INJECTION TYPE SCREW COMPRESSOR - A liquid injection type screw compressor in which, in a compression stroke of an working space formed by male and female rotors, liquids such as oil or water is prevented from leaking from the high pressure working space to a gas inlet side, suction resistance of gas sucked from the gas inlet to a rotor casing is reduced to improve volumetric efficiency, and shape forming of the casing is simplified. | 10-16-2008 |
| 20090148329 | VANE PUMP AND VAPOR LEAKAGE CHECK SYSTEM HAVING THE SAME - A vane pump includes a motor, a rotor rotated by the motor, a first casing having a pump chamber accommodating the rotor and a first flat part in a periphery of an opening of the pump chamber, a second casing having a second flat part joined to the first flat part to gas-tightly or liquid-tightly close the opening of the pump chamber, an elastic sheet disposed between the second casing and the motor, and a screw penetrating the first casing, the second casing and the elastic sheet. The screw is configured to fasten and join the first casing, the second casing and the elastic sheet to the motor. | 06-11-2009 |
| 20090238707 | VANE PUMP - A vane pump having a pump containing a rotor driven via a drive shaft with the rotor having a number of generally radially extending grooves distributed over its circumference each of which grooves support a vane shaped delivery element in sliding fashion. The rotor is encompassed by an eccentric circumferential wall, against which the radially outer ends of the vanes rest. Housing end walls are situated adjacent to the rotor in the direction of its rotation axis. When the rotor turns, the vanes deliver medium from a suction region to a pressure region offset in the rotation direction. An annular groove is provided in at least one of the housing end walls which annular groove encompasses the rotation axis of the rotor, is situated opposite the inner regions delimited in the grooves of the rotor by the vanes, and is connected to the pressure region via a connecting groove in the housing end wall. The annular groove extends in eccentric fashion in relation to the rotation axis of the rotor. | 09-24-2009 |
| 20090304540 | PD Pumps with a Common Gearbox Module and Varying Capacities and Easy Access to Mechanical Seals - Rotary lobe pump and circumferential piston pump designs are disclosed where the drive and driven shafts are detachably connected to their respective rotors. The rotors are disposed in a pump or rotor casing, which is sandwiched between a head cover and a gearbox. The drive and driven shafts pass through mechanical seal assemblies, which are sandwiched between the first and second rotors and the gear box respectively. The seal assemblies can be serviced or replaced by simply removing the head cover and removing the rotors from the drive and driven shafts. The pump casing does not need to be removed to replace or service the seal assemblies. Further, the capacities of the disclosed rotary lobe and circumferential piston pumps can be modified without changing the gearboxes or shaft length. To modify a pump capacity, all that needs to be changed are the rotors, the pump or rotor casing and, in some designs, the head cover or cover plate. In some designs, the cover plate is universal to the gearbox so that only the rotors and pump casing need to be changed to modify the pump capacity. | 12-10-2009 |
| 20100061872 | Gear Pump - A gear pump includes a drive shaft, a rotatable pump element mounted on the drive shaft, a side wall member disposed on one side of the pump element, and formed with a shaft hole through which the drive shaft extends, and a side plate disposed on the other side of the pump element. The gear pump further includes a connecting section connecting the drive shaft with the pump element in a manner to prevent relative rotation and to allow relative axial movement between the drive shaft and the pump element. The connecting section includes a drive recess formed in the pump element, and a drive projection projecting radially outwards from the drive shaft, and engaging in the drive recess to prevent the relative rotation. The drive projection is arranged to limit the axial movement of the drive shaft relative to the pump element with one of the side wall member and the side plate. | 03-11-2010 |
| 20100074785 | COMPRESSOR - A compressor includes a screw rotor and a gate rotor arranged to form a compression chamber. The screw rotor has an outer circumferential surface with at least one groove portion. The gate rotor has a plurality of tooth portions. Preferably, a first plane contains the screw rotor center axis, a second plane orthogonally intersects the screw rotor center axis, and a third plane orthogonally intersects the first plane and the second plane. The gate rotor center axis passes through an intersection point of the first, second and third planes. The gate rotor center axis is inclined relative to the second plane toward the same side as the groove portions of the screw rotor, as viewed in a direction perpendicular to the third plane. | 03-25-2010 |
| 20100239448 | FKM OR FFKM MULTIPLE LAYERS SEAL - A vacuum pump comprises two stator components and a seal located between the components to provide a fluid-tight seal between the components. The seal comprises an annular plastics tube housing an annular reinforcing member, the tube being at least partially surrounded by a sleeve formed from one of FKM elastomer and FFKM elastomer. | 09-23-2010 |
| 20100316520 | LIQUID PUMP - The invention relates to a liquid pump having a pump housing, a pump unit for generating a pilot pressure, a drive shaft used to drive the pump unit and guided out of the pump housing on a drive/output side, and a sealing unit sealing the passage. When the liquid pump is subjected to an admission pressure, the pressurized liquid generates, in the region of the sealing unit, at least one pressure field facing the sealing unit and at least one pressure field facing away from the sealing unit. According to the invention, an asymmetrical arrangement of the pressure fields is provided. | 12-16-2010 |
| 20110123381 | COMPRESSOR - The present invention provides a compressor, comprising: a stator ( | 05-26-2011 |
| 20110223050 | VANE PUMP APPARATUS - Disclosed herein is a vane pump apparatus. The disclosed vane pump apparatus comprises a housing having an outlet channel; a reservoir tank which stores working oil and which is coupled to the housing; and a vane pump installed inside the reservoir tank to discharge the compressed working oil to the outlet channel. | 09-15-2011 |
| 20110311385 | Vane Pump and Vapor Leakage Check System Having the Same - A vane pump includes a housing defining a pump chamber; a rotor rotatably arranged in the pump chamber; and a motor to rotate the rotor. An imaginary plane is defined to bisect the pump chamber in an axis direction. The housing has a first inlet port and a second inlet port located symmetrical with each other with respect to the imaginary plane, and the housing has a first outlet port and a second outlet port located symmetrical with each other with respect to the imaginary plane. | 12-22-2011 |
| 20120100027 | Internal-Rotation Type Gear Pump and Method of Assembling and Repairing an Internal-Rotation Type Gear Pump - A method of assembling and repairing an internal-rotation type gear pump has a preparing step, a disassembling step, a taking step, a repairing step and an assembling step. The preparing step includes preparing an internal-rotation type gear pump with a bearing mount device, a gland-sealing device and a pump device with a casing, a side cover, a driven gear and a driving gear. The disassembling step includes disassembling the side cover from the casing and disassembling and separating the gears from the driving shaft. The taking step includes separating and taking the gland-sealing device from the casing. The repairing step includes repairing the mechanisms inside the internal-rotation type gear pump and replacing with a new one if one of the mechanisms is broken. The assembling step includes putting the gland-sealing device into the casing, assembling the driving gear on the driving shaft and assembling the side cover on the casing. | 04-26-2012 |
| 20120141314 | VACUUM PUMP - The invention relates to a vacuum pump having a cup-shaped housing, a rotor, eccentrically mounted for rotation in the housing, at least one blade mounted in or on the rotor, and a housing cover closing the cup-shaped housing, wherein the rotor has a rotor shaft that passes through the cup-shaped housing and by which the rotor is driven, wherein the rotor shaft is sealed by means of a seal in the housing. | 06-07-2012 |
| 20120164015 | WATER INJECTION TYPE SCREW FLUID MACHINE - A water-lubrication type screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft. The bearing is located on the high pressure side and in this order from the rotor chamber side. the bearing includes a low pressure communicating channel for allowing an outflow space formed on the rotor chamber side with respect to the first non-contact seal to communicate with a low pressure channel for the target gas communicating with a low pressure space inside the rotor chamber or the rotor chamber, a pressurized communicating channel for introducing high-pressure target gas into a pressurized space formed between the first and second non-contact seals, and an open communicating channel through which an open space formed between the second non-contact seal and the lip seal opens to the outside of the casing. | 06-28-2012 |
| 20130011289 | IMPROVED FLUID COMPRESSOR AND/OR PUMP ARRANGEMENT - The present invention relates to a compressor or pump unit for the production or flow of compressed fluid and more particularly to a new uniquely designed compressor which has the capabilities to both draw fluid from an intake opening and direct dischargeable compressed fluid to a storage tank utilising a single compressor chamber simultaneously. | 01-10-2013 |
| 20130064704 | ROTATION DEVICE INCLUDING SEAL STRUCTURE - A seal member is configured so that an annular rubber member is disposed in an annular storage chamber of a resin annular member. Thus, the rubber annular member is not directly in contact with a drive shaft, and the rubber annular member can be prevented from wearing or peeling without requiring a rotation stopping structure for the seal member. Furthermore, the seal member is provided with first and second communication mouths, so that a brake fluid pressure is applied to compartments obtained by dividing the annular storage chamber using the rubber annular member. Thus, the rubber annular member is pressed, and then is elastically deformed, and accordingly, the resin annular member is expanded by the elastic force. Thus, a self-sealing operation can be performed on the basis of a high pressing force. | 03-14-2013 |
| 20130202470 | Rotary Vane Air Motor with Improved Vanes and Other Improvements - A rotary vane air motor comprises a rotor, stator and vanes. The rotor has slots for the vanes, and the vanes may move between a retracted position and a contact position in which the vanes contact the cylinder. Each vane may have a longitudinal portion whose shape conforms generally to the slot, and a transverse portion that is radially outside of the slot and extends at least in part in a direction that is transverse to the longitudinal portion and that may be tangential to the perimeter of the rotor at the slot. The shape of the perimeter may be a polygon with rounded corners. The vanes may also include a magnetic portion or a rotating portion. | 08-08-2013 |
| 20130209306 | Rotary Positive Displacement Machine - Rotary displacement machines are known for their uses as compressors, expansion engines and the like. Many comprise two or more rotors mounted for simultaneous rotation within a casing, with inter-meshing or interengagement of lobes and pits as surface features of the rotors, thereby to handle a working fluid. Disclosed herein are rotary displacement machines with improved structures and rotor configurations. | 08-15-2013 |
| 20130343942 | ROTARY COMPRESSOR - A rotary compressor ( | 12-26-2013 |
| 20140178234 | INTERNAL ROTOR-TYPE FLUID MACHINE - An internal rotor-type fluid machine includes a rotary shaft, a rotor which rotates together with the rotary shaft, a support portion which is provided on the rotary shaft or the rotor, and which supports the rotary shaft to be tiltable with respect to the rotor, and a pressure chamber inner wall surface which configures a pressure chamber by contacting an end surface of the rotor in an axial direction. The rotor is pressed toward the rotary shaft by a high fluid pressure, based on a pressure difference in the pressure chamber between a high pressure side and a low pressure side having a lower pressure than the high pressure side. The support portion is deviated in a direction away from the pressure chamber inner wall surface further than a center position of the rotor in the axial direction. | 06-26-2014 |
| 20150071806 | Rotary Vane Air Motor with Improved Vanes and Other Improvements - A rotary vane air motor comprises a rotor, stator and vanes. The rotor has slots for the vanes, and the vanes may move between a retracted position and a contact position in which the vanes contact the cylinder. Each vane may have a longitudinal portion whose shape conforms generally to the slot, and a transverse portion that is radially outside of the slot and extends at least in part in a direction that is transverse to the longitudinal portion and that may be tangential to the perimeter of the rotor at the slot. The shape of the perimeter may be a polygon with rounded corners. The vanes may also include a magnetic portion or a rotating portion. | 03-12-2015 |
| 20150093278 | ROTARY-PISTON ENGINE - The present invention relates to an engine or pump called rotary piston engine or pump, comprising a shape of revolution F relative to a delta axis, and rotatably movable about said delta axis in relation to an envelope V, and n cavities distributed over the perimeter of F. In each cavity is housed a rotating roller, characterized in that at least one roller has its centre angle determined so as to obtain the closed volumes it delimits, as large as possible. | 04-02-2015 |
| 20150300352 | PUMP WITH MECHANICAL SEAL ASSEMBLY - A sliding vane, positive displacement pump is provided which includes a dual mechanical seal that protects against leakage from a pump chamber while also reducing slip across rotor end faces. The dual mechanical seal may be formed as a cartridge seal that is readily demountable from the pump for replacement and service, and is retrofittable to existing pumps to improve the performance thereof. The pump may integrally include a dual mechanical seal, or the mechanical seal assembly may be provided for use by itself or in combination with a replaceable head ring that can be installed on existing pumps for repair thereof or for a retrofit upgrade of such existing pump. | 10-22-2015 |
| 20160153450 | PUMP FOR METERING A LIQUID ADDITIVE FOR A SELECTIVE CATALYTIC REDUCTION DEVICE | 06-02-2016 |
