Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 151 - 200 out of 657

Document Document Title
WO/2002/023699
Hydraulic drive systems require compact, efficient motor-pump aggregates. These requirements are met by integrating, as far as possible, an electromotor and one or more pumps into one device. This does however present this problem that o...  
WO/2001/096742
The invention relates to a portable hydraulic pump unit (1) comprising a housing (2), a pump (5), a drive motor (6) for the pump (5), in particular in the form of an electric drive motor, in addition to a reservoir (13) for hydraulic flu...  
WO/2001/092684
A well production apparatus includes a down-hole gear pump and a transport assembly to which the gear pump is attached. The transport assembly is formed from a string of modular pipe assemblies having one or more passages for carrying pr...  
WO/2001/073295
The invention relates to a motor-pump unit comprising an electromotor (1) and a pump (2). The invention is characterized in that the pump (2) is surrounded concentrically by the rotor/stator (1.3, 1.1) of the motor; the rotor (1.3) of th...  
WO/2001/065118
A hydraulic pressure transformer (10) for the conversion of an input hydraulic power to an output hydraulic power comprises a cam block (26) including a cam opening (30) defining a pump section (32) and motor section (34). The pump secti...  
WO/2001/059288
An integrated brushless DC wet motor pump unit comprises a pump, a motor and a motor controller all contained within a housing. The motor includes a stator having stator coils fixed in relation to the housing and a motor rotor surroundin...  
WO/2001/053701
This invention offers advantages and alternatives over the prior art by providing a dual port hydrualic fixed-displacement pump (20) which exhibits improved efficiency by diverting a portion of the flow of discharged fluid to the low-pre...  
WO/2001/053702
This invention offers advantages and alternatives over the prior art by providing a dual port hydraulic fixed displacement pump (20) which exhibits improved efficiency by limiting the volume of discharged fluid which is subjected to the ...  
WO/2001/053724
A dual gerotor pump (22) is used for an automatic transmission. A dual gerotor pump (22) which is driven by a central drive mechanism (34) has a first chamber (36) which continuously provides transmission fluid to the automatic transmiss...  
WO/2001/025638
Said pump consists of a drive axle (9) and a driven axle (9') on which three separate pump bodies are mounted, each of said bodies consisting of a drive gear (6a) (6b) (7) and a driven gear (6'a) (6'b) (7') that are mounted on the drive ...  
WO/2001/025639
Disclosed is a twin pump. The twin pump comprises a casing having an inlet port and an outlet port which are defined at center portions of lower and upper surfaces thereof and a pair of cylinders which are defined in a manner such that t...  
WO/2001/018397
The invention relates to a device for pumping fluid using a hydraulic pump (10) and a drive (12) whereby the hydraulic pump (10) is produced as an independent component with different types of drive devices (12) as additional components ...  
WO/2001/006127
A long-life, low maintenance, bi-directional vane-type water pump has a high degree of symmetry and operates with equal efficiency in either direction. The axial position of the drive shaft is controlled to permit improved lubrication by...  
WO/2000/077363
The invention relates to a method for operating a turbomachine and to a device for carrying out this method. The aim of the invention is to improve the degree of efficiency of a machine of this type. To this end, fresh air that has been ...  
WO/2000/075518
A pumping arrangement for pumping a liquid product (10), such as oil products or liquefied gas, from a tank or container (11) comprises a rotary, high capacity main pump (12), such as a centrifugal pump, to be submerged in the liquid pro...  
WO/2000/061971
The invention refers to control devices applied in a hydrostatic transmission, which includes a motor pump (MP), a hydrostatic circuit (HC 1 and HC 2) and an impelling pump (IP), which is formed by a rotor (1), a stator (2) and a body (3...  
WO/2000/055506
The present invention provides a two-stage centrifugal compressor. The compressor of this invention has a simplified refrigerant passage structure and effectively cools its electric motor in addition to bearing parts using an existing re...  
WO/2000/052339
Double acting multiplier of power is specified for transformation of hydraulic energy to mechanical power over, at the same time, multiplication of power. Principles of multiplier works are: oil, from the high pressure pump, through the ...  
WO/2000/043673
A multi-stage pump (48) has a housing (16) defining a plurality of stages (86, 88, 90) each having an internal rotor enclosure (62, 63, 64, 66, 68, 70, 72) with each enclosure having a non-pumping inlet and outlet (92, 94, 96, 98). A plu...  
WO/2000/042321
A hydraulic machine of the gerotor type. The machine uses two gerotors which are preferably coplanar, and positioned nearly concentric to each other. This dual arrangement approximately doubles the displacement of hydraulic fluid per rev...  
WO/2000/039465
The invention relates to a pump assembly comprising a vane-cell pump and a second hydraulic pump which is driven together with the same. The vane-cell pump has a suction area in which first pressure chambers between the vanes and second,...  
WO/2000/029730
A pump arrangement (10) is disclosed having a housing (12), a first pumping chamber (14) within the housing, a drive shaft (18) carried by the housing, and first pumping means (16) arranged for rotation within the first pumping chamber (...  
WO/2000/026506
The rotary piston machine (10) has a fixed housing (12) that can be closed by a front-face lid (24) and which contains at least two cylindrical bodies (40, 70) arranged therein, whereby a first inner cylinder body (40) rotates around a m...  
WO/2000/026540
The invention relates to a series for compressed air motors provided for different volumetric displacements comprising at least two compressed air motors (1, 100). Each compressed air motor has at least two intermeshing displacement elem...  
WO/2000/026539
The invention relates to a line of products for gear pumps having different delivery volumes and which comprise at least two gear pumps (1, 100). Each gear pump comprises at least two displacement elements (45, 104, 105) which intermesh ...  
WO/2000/025026
The invention relates to submersible pump with a transmission (10) and a compensator (24). The transmission (10) comprises a transmission housing (12) filled with a lubricating fluid. Said transmission housing accommodates a driven input...  
WO/2000/023251
An extrusion method and an extruder, the material to be extruded being fed with a material feeding device (1) into a radial pump unit included in the equipment. The radial pump unit comprises conical gearwheels (2) which are adjacently p...  
WO/2000/008338
A motor driven pump comprises a motor stator (30), a motor rotor (10) operable to rotate around the outside of the stator (30) and a pump mechanism (40, 50) driven by the motor rotor (10) and disposed at least partly inside the motor sta...  
WO/2000/005504
The invention relates to a gear pump (2) for the steering aid of a motor vehicle, which is integrated into the housing (1) of the transmission unit and enclosed by both the damping chamber (4) and the suction chamber (5), which chambers ...  
WO/1999/064745
A lubricating oil supplying arrangement for an apparatus having a rotating apparatus shaft with an oil pump is arranged at one end of the apparatus shaft (23) and is driven by this apparatus shaft (23). A pump housing (2) has a pocket (3...  
WO/1999/059859
A power steering device for assisting a steering operation by a hydraulic pressure generated from a hydraulic pump, comprising an electric motor, the hydraulic pump driven by the electric motor, and a control device which is positioned b...  
WO/1999/045272
A positive displacement pump-motor for pumping flammable liquids comprises a pump (139), an explosion-proof motor (110), a filter (113), a cylone gas separator (115), and a sump (140), that has an additional gas separator, internal baffl...  
WO/1999/022141
There is described pumping apparatus which consists of a Moineau pump coupled to a fluid pump and a primemover for providing rotational motion over the rotor of the Moineau pump. The inner rotor of the Moineau pump is preferably mounted ...  
WO/1999/020904
A roller vane motor for downhole drilling comprises a housing (1) and a rotor (2). The housing contains wing deflector cams (5) that divide the space between housing and rotor into chambers (8a, b). The rotor is equipped with cylindrical...  
WO/1999/001667
A down hole rotary pump (18) in a well (16) is driven by a down hole hydraulic motor (26). This arrangement eliminates the sucker rod drive that causes power loss and tubing wear and mitigates problems in completing directional and devia...  
WO/1998/025029
Motor pump unit in which the pump comprises a first rotating or orbiting displacement element, which performs a relative movement in relation to a second displacement element. The motor is an electric motor driving the pump directly by m...  
WO/1998/021478
A twin-cylinder impeller pump is disclosed. In the above pump, the twin-cylinder runner (3, 4) is provided with an elastic sealing means for removing any gap from the junction between the runner and the throat of a pump casing (10) with ...  
WO/1998/020259
At least two progressing cavity pump sections (16, 28) are connected in series. The flow volume rate of the second pump or pump section is less than the flow volume rate of the first pump or pump section. The cascade arrangement of progr...  
WO/1998/015456
A demand system is disclosed for controlling the output airflow from a pneumatic source in response to changes in airflow demand. The source includes a pressure sensitive bypass mechanism in fluid communication with a discharge manifold ...  
WO/1998/006610
A motor pump is built into the car body of a vehicle. Fastening means must be provided for that purpose on the motor pump. In the disclosed pump aggregate (4), the motor fastening screws (60, 60') with which the electromotor (20) is fast...  
WO/1998/000641
This disclosure relates to a vapor recovery unit of a fuel dispenser, and comprises a vapor pump, a variable speed electric motor coupled to drive the pump, and an electric control package connected to control the speed of the motor, the...  
WO/1997/047884
An apparatus for providing pressurized liquid for operating a hydraulically operated device of an airplane comprises a pump for pumping liquid, a high speed flood cooled permanent magnetic motor for driving the pump, a drive connecting t...  
WO/1997/032130
A vapor recovery pump for pumping flammable vapors is disclosed. The pump includes a pump unit that defines a pump chamber into which the vapor is first drawn and then exhausted from. A motor contained in a motor housing provides the mot...  
WO/1997/020143
A gear pump (10) is disclosed having an integrated gear cavity (40) and bearing receptacle (54) that includes a fluid path for lubricating the bearings (24a, 24b). The preferred embodiment includes a helical gear pump (18, 20) having a m...  
WO/1997/012123
A hydraulic machine (1) is disclosed, having a gearwheel (4), which is arranged on a shaft (2) so that they rotate together and which has a first external toothing (5), a gear ring (7), which has a second external toothing (8) and a firs...  
WO/1997/012124
A hydraulic machine is disclosed, having a gearwheel (1) which has a first external toothing (8), a gear ring (3, 5), which has a first internal toothing (9) having at least one tooth more than and meshing with the first external toothin...  
WO/1997/010437
A braking mechanism, for controlling the release of energy in a rod string (34) for a down-well rotary pump (33), incorporates a rotary member (16) positioned in the energy loop from a prime mover to the top end of the rod string, requir...  
WO/1996/032590
The rotary pump may be classified as a volume pump and is used for the transportation of various fluids and generating necessary pressure. The rotary pump comprises the following main elements: pump housing (1), geared rotors (3) located...  
WO/1996/030410
Described is a method of producing solutions of cellulose in water-containing tertiary-amine-N-oxides by preparing a mixture containing cellulose, water and tertiary-amine-N-oxides and subsequently reducing the water content of the mixtu...  
WO/1996/022467
A rotating liquid ring compressor/turbine (RLRC/T), including a rotor having a core (6) and a plurality of radially extending vanes (8) mounted thereon, a tubular jacket (4) having outer and inner lateral portions, eccentrically, rotatio...  

Matches 151 - 200 out of 657