Abstract: The present invention relates to a dry vacuum pump which includes multiple-tier cylinders, a gas flow path formed in a cover, and a cooling water flow path for thereby concurrently a heat of cooling rotation friction elements and a high temperature gas.

Abstract: A turbo blood pump includes a housing 1 having a pump chamber 2, an inlet port 3, and an outlet port 4, an impeller 5 disposed rotatably in the pump chamber, an upper bearing 9 and a lower bearing 10 supporting the impeller rotatably, and a driving force transmitting unit for driving the impeller to rotate. The upper bearing is supported at a position in the pump chamber below the inlet port, so that a cross-sectional area of the pump chamber in a plane including an upper end of the upper bearing and being orthogonal to a shaft of the impeller is larger than a cross-sectional area of a flow path of the inlet port at a portion where the inlet port is coupled to the pump chamber, and thus obstruction with respect to blood flow by the upper bearing is of such a degree as to be permissible from a practical viewpoint, while an impeller is supported by upper and lower bearings. Thereby, the pump is less likely to cause problems of blood stagnation and thrombus formation.

Abstract: This invention relates to a bleed valve of a compressor, in particular a compressor of a bypass aero-engine, with a guiding device provided downstream of a valve body in the bleed duct, said guiding device directing the bleed airflow from a compressor duct to a bypass duct in such a manner that the direction of the flow of the bleed airflow is imparted with a component which is unidirectional with the airflow carried in the bypass duct. The present invention provides a dissipation screen in the bleed duct between the valve body and the guiding device to reduce the energy contained in the bleed airflow, thereby decreasing the loading of the bypass duct. Moreover, the present invention provides for an attenuation chamber downstream of the dissipation screen as viewed in the direction of the bleed airflow.

Abstract: A fan assembly is disclosed. The fan assembly has a frame and a motorized blade assembly. The motorized blade assembly has an electric motor and an integrally attached bladed propeller with a central hub. The motor includes a rotor and a stator, the rotor having a rotatable output shaft extending from a front side of the motor with a bladed propeller secured to the output shaft. The motor includes a housing with a mounting area for securing an electrical control switch. The mounting area is provided by a flange portion of the rear motor wall and positioned radially outwardly relative to the output shaft, and provides mounting of the control switch with a user interface that is exposed from the fan frame. The fan assembly motor also may provide an electrical connection port for removable attachment of an electrical power cord, wherein the connection port is integral with the motor housing and is exposed from the fan frame for attachment of the cord by a user.

Abstract: A motor-pump unit including an electric motor and a pump. The pump is concentrically surrounded by the rotor/stator of the motor. The rotor of the electric motor is U-shaped, viewed in an axial section. The cross-piece of the “U”, in the region of the common axis, is provided with an interior toothing. The shaft of the pump includes a pinion that meshes with the interior toothing of the cross-piece of the “U”.

Abstract: A fluid pump is provided that produces an outflow of fluid that is not proportional to the speed of the input drive. Thus, the fluid pump can be tuned to provide a substantially constant outflow of fluid irrespective of the speed of the input drive. The fluid pump also provides fluid outflow when the rotational direction of the input drive is reversed.

Abstract: A diaphragm pump with hydraulically powered diaphragm that is so chucked on a circulating rim between a pump lid and a pump housing in a predetermined radial chucking area and with a predetermined press-on force between the pump lid and the pump housing that the press-on force will be below a flow limit of the diaphragm material. At least one elastic part is provided additionally in the chucking area. That part is so designed that it will elastically compensate for any reductions occurring during the operation of the diaphragm pump in the press-on pressure in the chucking area of the diaphragm between the pump lid and the pump housing.

Abstract: Air captured from the tips of a compressor of a gas turbine engine is diverted from the engine core and can be collected for auxiliary uses. Gas path separation can be achieved using part-span shrouded compressor blades or using blade tip cut-outs conforming to an airflow dividing annular shroud. In a preferred application for the present invention, the gas turbine engine is the auxiliary power unit of an aircraft. This permits compressed air generation for Auxiliary Power Unit oil cooling and for compartment pressurization without loosing significant mass flow to the engine core, while eliminating the need to provide a separate active cooling system such as an engine driven fan.

Abstract: To control the separation of a hot gas ejection jet within a rocket engine nozzle, the device includes a jettisonable annular structure for placing around the outside wall of the nozzle at the gas cutlet section thereof, which structure defines a radial extension around the nozzle so that in the presence of an outlet jet coming from the nozzle, it creates a low pressure zone in the vicinity of the bottom face of the device, thereby displacing in the gas outlet direction jet separation from the interior wall of the nozzle.

Abstract: A transdermal agent sampling device is provided. The sampling device is comprised of a microblade array and a device for applying a partial vacuum. The microblade array comprises a sheet having a plurality of microblades for piercing the skin to a very shallow depth (i.e., 25 &mgr;m to 400 &mgr;m) to create microslits in the outermost stratum corneum layer of the skin. The partial vacuum applying device applies a partial vacuum in the range of about 0.1 to about 0.8 atm, and preferably about 0.3 to about 0.7 atm, for sampling a body analyte such as glucose in interstitial fluid. The partial vacuum is applied for a period of about 2 to about 30 seconds, and preferably about 5 to about 15 seconds. The interstial fluid is analyzed for body analyte (e.g., glucose) content or concentration.

Abstract: A manual/pneumatic oil pumping device including a housing having an upper cover equipped with a manual mechanism and a pneumatic air sucking mechanism. A closing means is disposed in the upper cover corresponding to the pneumatic air sucking mechanism. When the closing means is in an opened state, the oil reserving space communicates with the pneumatic air sucking mechanism so that the pneumatic air sucking mechanism can suck out the air in the oil reserving space and thus pump the oil. When the closing means is in a closed state, the oil reserving space does not communicate with the pneumatic air sucking mechanism and a user can manually pump the oil.

Abstract: A self lubricating bearing for use submerged in cryogenic fluids. The self-lubricating bearing comprises hardened races, hardened rolling elements and polymeric retainers or cages. More particularly, the rolling elements may be hardened balls, and the polymeric cages may include PEEK. In particular a bearing for self lubricated use in seal-less, magnetic drive pump for pumping fluids at very low temperatures and cryogenic temperatures below about −100 degrees centigrade such as liquid nitrogen and temperatures below about −150 degrees centigrade such as liquefied natural gas (LNG). An environment for submerged use of such a bearing may be a magnetically driven cryogenic pump with a housing having an intake and exhaust with a back plate mounted therein in which a shaft is journaled in self-lubricating bearings having hardened stainless steel or ceramic balls, stainless steel races and polymeric retainers or cages for retaining the balls for rolling contact in the races.

Abstract: The fluid discharge device includes an axial drive device for giving an axial relative displacement to between a piston and a cylinder, a device for giving rotary motion, and a device for pressure feed of fluid. The ON/OFF control of discharge flow rate can be fulfilled by changing the fluid resistance of the discharge passage with the axial drive device.

Abstract: A composite piston (30) for a vibration pump comprises a core (32), activating a piston, and a piston (34) made of plastic and obtained by means of molding on an insert formed by the core (32). The composite piston (30) thus obtained achieves objects of high precision at a low cost which cannot be achieved with traditional simple pistons made entirely of ferromagnetic metal.

Abstract: An introducer catheter used to deliver an endocardial cardiac electrode has a stylet lumen which collapses upon removal of the stylet to allow for more clearance for the lead and connector to pass when the catheter is removed after lead placement. The collapsible stylet lumen permits the introducer catheter size to be reduced to 8 or 9 French and provide for passage of a 4 French lead.

Abstract: A magnet pump with bi-directional axial self-alignment comprises an inner chamber (12), provided with a suction duct (13) and a delivery duct (14); an impeller (25) located in said chamber (12) in a rotatably and axially movable manner, and having, a front portion (26) oriented towards the suction duct (13); a driven rotor (31) integral with the motor spindle (51), located outside said chamber (12) and bearing magnets (34) cooperating with as many driven magnets (35) facing the same, located in the rear portion (27) of impeller (25), and a magnet (41) fixed in the inside of said chamber (12) and cooperating with a second magnet (42), incorporated in said impeller (25) so as to realize a linear magnetic coupling.

Abstract: It is an object of the invention to, even in the case where liquid containing a sedimenting material such as slurry is used, prevent sedimenting and aggregation from occurring in a pump. As means for attaining the object, a bellows 7 that is extendingly and contractingly deformable in the axial direction is placed in a pump body 1 with setting the axis B of the bellows vertical so as to be driven to perform extending and contracting deformation, and form a liquid chamber 9 inside the bellows 7. A suction port 18 and a discharge port 19 are formed in an inner bottom face 4a of the pump body 1 facing the liquid chamber 9. Liquid is sucked from the suction port 18 into the liquid chamber 9 by extension of the bellows 7, and the liquid in the liquid chamber 9 is discharged from the discharge port 19 by contraction of the bellows 7. The inner bottom face 4a is formed into a conical shape in which the face is downward inclined as moving toward the discharge port 19.

Abstract: A reciprocating compressor has a pair of discharge mufflers disposed on a lower portion of a cylinder block, a first and a second refrigerant channels for intercommunicating the pair of discharge mufflers with a refrigerant discharge chamber of a cylinder head, a pair of muffler covers for sealing the pair of discharge mufflers, respectively, a connecting pipe for connecting the pair of muffler covers with each other, and a refrigerant discharge pipe connected to either one of the pair of muffler covers that is intercommunicated with the second refrigerant channel. The first and the second refrigerant channels have refrigerant inflow sides connected to the refrigerant discharge chamber, and refrigerant outflow sides having a cross-sectional area smaller than the cross-sectional area of the refrigerant inflow sides.

Abstract: The catheter assembly includes an expandable member mounted to the distal end of a placement catheter, for delivery of a therapeutic device in one of the branch vessels of a bifurcated vessel. The catheter assembly includes lumens for a tracking guide wire and a positioning guide member for placement of the therapeutic device. The therapeutic device is mounted on the expandable member, the tracking guide wire is placed into the target branch vessel, and the placement catheter is then introduced over the tracking guide wire. A positioning guide member is introduced through the catheter, extended through an exit port in the catheter proximal to the expandable member, and then placed in another branch vessel of the bifurcation. The placement catheter then is advanced until the positioning guide member engages the vessel carina between the branch vessels, and the therapeutic device then may be placed accurately in the target branch vessel.

Abstract: Described is a radial piston pump with a pump housing (3), which has a plurality of cylinder bores (5) arrayed in star shape around a cam (4), for the reception of pistons (6) and possesses inlet (7) and outlet (8) when penetrate to each cylinder inner chamber (9) with a therein compressible working volume. In accord with the invention, each cylinder inner chamber (9) is provided with at least one relief opening, which connects the working volumes during a compression stroke of the piston (6) with a space of lesser pressure for the reduction of the pressure gradient and also thereby reducing the noise of the pump.