Abstract: A hand-held power tool having a multi-speed transmission and a clutch. The multi-speed transmission and the clutch are coupled to one another via a set of interconnecting tabs that are slidingly engaged to one another and secured with pins to inhibit the withdrawal of the tabs from one another. The clutch may include a clutch member, a unitarily formed clutch plate and a plurality of engagement members. The clutch plate includes an annular plate member and a plurality of leg members that extend generally perpendicularly from the annular plate member and which bias the engagement members into engagement with the clutch member. The clutch member may be coupled to an element of the multi-speed transmission, such as to the ring gear of a planetary gear set, so as to reduce the overall size of the power tool.

Abstract: A drill bit for the working of metal has a center pilot tip that transforms into straight cutting edges extending towards the outer periphery of the bit. Each cutting edge forms a cutting angle of 1-20° with a reference plane oriented perpendicular to of the drill axis. Each a cutting edge is inclined in a radially inward and axially rearward direction toward the drill axis. The center tip forms a pilot point angle of 90±2° and a has base that takes up 23-45 percent of the total diameter of the cutting section of the drill bit. The tip has a tip angle of 90±10°.

Abstract: The invention relates to a machine reamer, with a shaft-like base body (10) and a reaming head (12), projecting axially from the front face of the base body. According to the invention, the reaming head is in the form of a one-piece exchangeable cutting tip (12), which may be chucked into a tip seat (14) on the front face of the base body (10), in a coaxially self-centering manner, in order to maintain a high precision coaxialism, despite low material and construction requirements.

Abstract: The invention relates to a side-milling cutter (15, 16) for machining cylindrical contours on a workpiece, in particular a crankshaft (10). Said cutter comprises several cutting inserts, tilted at an axial angle of inclination (x), arranged on the periphery of a disc-shaped tool carrier. One part of said inserts is mounted radially and the other part of said inserts tangentially on the tool carrier.

Abstract: A coupling device, particularly for vehicle wheels undergoing surface finishing, comprising means (14) for the releasable fixing of the wheel (11) to a chuck (12), which act in holes (13) for the passage of screws for fixing the wheel (11) to a hub of a vehicle.

Abstract: A cutting tool having a blade section on one end is mounted on a spindle of a cutting machine, and the blade section is contacted with a workpiece to perform planing of the workpiece into a desired shape. Because the tip of the blade section is disposed on the spindle axis, the position of the cutting edge is controlled by performing drive control of the X-axis and Y-axis of the spindle. Thus, the control of the cutting machine is simplified, and path errors resulting from synchronous control can be eliminated.

Abstract: A column fixed type machine tool capable of surely suppressing the dispersion of chips and coolant to the outside of a machining space and reducing the entire size thereof so as to increase a workability and improve a working environment, wherein a column (2) is installed fixedly on a bed (1), a spindle head (8) is installed at the front of the column movably in vertical, lateral and longitudinal directions (f1, f2, f3), a jig device (42) is installed on the bed at the front of the column, a column side cover body (cov1) densely covering the front surface of the column is provided so as to protect against the dispersion of chips, the cover body is formed so as to allow the spindle head (8) to be moved in vertical and lateral directions, a jig side cover body (cov2) covering at least the surrounding of a jig main body part (47) is installed, an intermediate cover body (cov3) covering the upper and right and left sides of the spindle head moving range is installed between the jig side cover body and the column

Abstract: A hand tool apparatus uses a cutting tool with a first width and a tool axis to machine a hole in an object. The hole has a second width at least as large as the first width of the cutting tool. The tool axis passes through a predetermined point on a surface of the object. The apparatus includes an actuating assembly including a housing. The housing contains an axial feed mechanism configured for moving the cutting tool in an axial direction, a spindle motor configured for rotating the cutting tool about the tool axis, and a radial offset mechanism. The radial offset mechanism is configured for moving the axial feed mechanism in a radial direction such that the tool axis is offset from a principal axis. A motor is configured for rotating said axial feed mechanism and the cutting tool about the principal axis.

Abstract: The invention relates to a reaming tool for reaming out several axially interspaced borings (14) of a workpiece (12). The reaming tool comprises a guide shank (16) which can be clamped into a machine spindle and which can be supported in prepared borings (14) of the workpiece (12) to be machined using external supporting elements (18). The reaming tool also comprises a reaming head (26) which coaxially connects on the front end thereof. In order to be able to easily change a worn tool, the invention provides that the reaming head (26) can be connected to the guide shank (16) by means of an auto-centering clamping mechanism (30), and that the supporting elements (18) positioned in the proximity of the clamping mechanism (30) can, during a clamping process, be radially spread in an at least partial manner from a dimension smaller than that of the diameter to a predetermined diameter guide dimension.

Abstract: A non-compressing device for securing a two-wheeled vehicle to a towing apparatus has a triangular shaped structure with a base and two legs, the two legs attach to the base to form a triangle. The base of triangular shaped structure is then attached to the towing apparatus. A clamp is attached to the legs of the triangular shaped structure. Alternately, a T-shaped structure has a foot and pedestal and is attached to the towing apparatus. Retractable legs and a foldable base of the triangular shaped structure for the purpose of storing or transporting when not in use or detaching the foot from the pedestal on the T-shaped structure for the purpose of storing or transporting when not in use may be included.

Abstract: The invention provides a reconfigurable patient support pallet system for transporting patients on litters. The patient support pallet system includes a pallet mounted to the floor of a vehicle. The pallet has a plurality of track rails and attachment points for attaching a litter stanchion set, capable of holding a patient in a litter, and/or for attaching a seat to the surface of the pallet. The pallet also includes a plurality of pallet lips and cargo rings on the periphery which provide locations to attach one or more pallet extensions, pallet spacers and/or pallet ramps to increase the usable surface area of a pallet, as well as and facilitate safe passage on, off and between pallets by reducing tripping hazards inherent in cargo aircraft.

Abstract: The clip 1 comprises a hollow bushing 6 with a flange 10 and a shank 11, and a pin 5 with a shank 9 inserted into the bushing 6. The pin shank 9 is inserted into the bushing shank 11 to enlarge the bushing shank 11 so workpieces 2, 3 are connected to each other by the enlarged section of the bushing shank 26 and the bushing flange 10. A guide 13 extending from the end of the bushing shank so the pin shank is inserted into the bushing shank 11 without enlarging the bushing shank is formed in the end of the pin shank 5. The guide 13 has a large diameter section 14 larger than the end of the bushing shank. The diameter of the large diameter section 14 is formed so as to be larger than the diameter of a thick section 26 of the creep-deformed bushing shank when enlarged by the pin shank.

Abstract: The screw grommet 1 comprises a flange 2 and a shank 3 extending from the flange. The shank is provided with flexible legs 7 extending from the end of the shank towards the flange and outwardly from the shank. The shank has a screw insertion hole 13 into which a tapping screw is screwed to prevent the legs from being bent radially inward towards the shank so that the screw grommet is fixed to the workpiece by means of the legs and the flange. The inner portion of the legs is provided with a threaded section turned by screwing in the tapping screw. The flange 2 is integrated with a tubular fastening torque bearing section 18 extending in the direction opposite the shank 3. The fastening torque bearing section is formed with a screw insertion hole having a diameter smaller than the outside diameter of the tapping screw so as to receive the tapping screw.

Abstract: The invention relates to the production of a nut which comprises a drive area (2) and a clamping area (3). A bore hole (B) running through the clamping area (3) and the drive area (2) is produced in a cylindrical manner. A screw tap (15) is screwed into the cylindrical bore hole (B) until a predetermined position is reached. Said screw tap is successively provided with the following, when seen in an axial direction from the front side thereof: a centering/cutting section (17), an adjoining cutting section (19) which is used to produce a conical internal screw thread section (8) in the clamping area (3), and a cutting section (21) which is used to produce a cylindrical internal screw thread section (7) in the drive area (2).

Abstract: This invention relates to a method of coupling a sheet metal member and a synthetic resin plate member to each other, and a structure coupled by this coupling method. This coupling method includes the steps of forming a plurality of burring holes in the sheet metal member, which is to be coupled to a synthetic resin plate member having a plurality of prepared holes for self tapping screw insertion, by subjecting the sheet metal member to a burring process from the side of its coupling surface, positioning the coupling surface of the sheet metal member on the synthetic resin plate member such that the plurality of burring holes correspond to the plurality of prepared holes, respectively, and screwing self tapping screws in the plurality of burring holes and the plurality of prepared holes from the burring portion side.

Abstract: A self-drilling screw (10) for use in steel houses has a leg (11), one end of the leg being formed as a drilling portion (12), the other end continuing to a flathead (13) through a neck (16) disposed close to the flathead (13). A tapping thread (14) formed around the leg continue from drilling portion, with a guiding thread (15) continuing from the tapping thread. A fastening thread (17) formed around the neck has a larger diameter than tapping and guiding threads (14, 15), the neck (16) being a thickened portion of the leg (11). A recess (18) formed in flathead (13) to engage with a driving tool is defined by and between torque-receiving walls (19) extending in parallel with the screw axis and beyond a boundary between the flathead (13) and neck (16), so that a driver can fit in the recess of such a thinned flathead to transmit a strong torque to tighten the screw into a steel panel, without any fear of caming-out problem.

Abstract: A self tapping bolt is provided, which fastens a mounting member and a receiving member while the bolt cuts internal threads on an inner surface of a tap drill hole prepared in the receiving member. The bolt includes at least one groove formed near an end of a threaded portion of the bolt and a blade for cutting the internal threads. The bolt has the features that the blade is formed only on a rear end surface of the groove relative to a rotational direction of the bolt which is screwed into the tap drill hole.

Abstract: The present invention is directed to a fastener device that includes a base portion. At least one shank is coupled to the base portion. The at least one shank includes an end configured to be driven into a material. The at least one shank also includes a weakened shank region disposed between a first adjacent shank region and a second adjacent shank region. The weakened shank region includes a cross-section irregularly weakened with respect to the cross-sections of the first adjacent shank region and the second adjacent shank region.

Abstract: The invention is directed to a fastening plate (1) for fastening a component (2) on a printed circuit board (2), said fastening plate (1) comprising incisions (4) that part the direct connections between the printed circuit board fastening points and the component fastening points of the fastening plate (1). The invention is also directed to a fastening arrangement having the fastening plate (1). Over and above this, the invention is directed to the employment of the fastening plate (1). Due to the incisions (4) in the solder star, a solder star electrolytic capacitor having high resistance to oscillation can be realized; this can be advantageously utilized particularly in the automotive sector.

Abstract: A self propelled truck having as support chassis or frame (2), two pairs of wheels (3) arranged on opposite sides of support chassis (2), a steering device (4) and driving means (31) for a pair of wheels (3) the support frame (2) comprises two longitudinal sides spaced from one other, each of which being supported by a respective pair of wheels (3), at least one pair of transverse members (13, 14) designed to rigidly bridge the two longitudinal sides of the truck and to delimit therewith a longitudinal tunnel, at least one lifting-lowering shaft (15) for a bin (7) between the longitudinal sides of the truck, lifting-lowering means (27, 48) carried by the support chassis (2) at each lifting-lowering shaft and displaceable between a fully lowered position and a fully lifted position, and removable engagement means (20, 25; 51, 52; 51a, 52a; 55) for a bin (7), which is rigidly displaceable with the lifting-lowering means (27; 48) and designed to engage a bin (7) on the ground at a lifting-lowering shaft and to h

Abstract: A vacuum lifting and handling apparatus (1) for product containers, comprises a lift tube (2) adapted to be suspended at its upper end (3) from an elevated location, and provided with a suction foot (14), the tube (2) being extendible and retractable under the influence of an internal vacuum, with a control unit (13) carried by a lower end (16) of the vacuum tube (2) to vary the internal vacuum as required during a container lifting and handling sequence by introduction of ambient air into the lift tube, and a replaceable air filter (17) is housed within the lower end (16) of the lift tube (2).

Abstract: A gas turbine engine 10 includes an intermediate pressure compressor 14 connected to an intermediate pressure turbine 22 by a driveshaft 28. The driveshaft 28 comprises a downstream turbine shaft 34 attached to the intermediate pressure turbine 22 and an upstream compressor shaft 32 attached to the intermediate pressure compressor 14. The compressor shaft 32 and turbine shaft 34 are connected together by a splined connection 36 which allows the turbine shaft 34 to drive the compressor shaft 32. If the splined connected 36 should fail, so that it no longer transmits torque, a further splined connection 41 comes into operation to transmit torque between the turbine shaft 34 and compressor shaft 32. When this happens, torque is transmitted via a torsionally weakened, shear section 48 of the turbine shaft 34 which tends to break under certain engine conditions. The turbine shaft 34 is then released axially and turbine overspeed is restrained.

Abstract: A high-pressure turbine nozzle-vane band for a gas turbine engine, the band comprising an inside surface supporting at least one guide vane having a trailing edge that is directed towards a downstream end of the band, and an outside surface, opposite the inside surface, from which a flange extends radially, defining firstly, upstream from the flange, a passage for cooling-air, and secondly, downstream from the flange, a cavity, the inside surface of the band being provided, between the trailing edge of the guide vane and the downstream end of the band, with a coating forming a thermal barrier enabling a temperature gradient generated in the band by the air spinning in said cavity to be increased.

Abstract: A turbine rotor can fix the heat resisting pipes provided in divided form per the disk member with simple structure for preventing wearing and damaging. The turbine rotor includes a coolant flow path formed through a plurality of disc shaped members respectively stacked across stacking planes in axial direction, a heat resisting pipe divided into a plurality of fractions adapted to be inserted into a portion of the coolant flow path defined in each disc shaped member, spot facing recesses each formed at opening portion of coolant flow path at the same side of the disc shaped member coaxially with the coolant flow path and having greater inner diameter than the opening portion, and ring shaped projecting portions formed at respective end portions of the fractions of the heat resisting pipe and engageable with respective spot facing recesses.

Abstract: A device for controlling a variable-angle vane for a stator of a turbomachine compressor, the device comprising a link, connection means forming a hinge between a first end of the link and a control ring, and fixing means for fixing a second end of the link on a pivot of a vane to be controlled, a radial recess formed in the vane pivot for receiving the second end of the link, the recess having at least one plane edge inclined relative to a longitudinal midplane of the recess and co-operating with a corresponding inclined edge of the second end of the link, and a clamping cap bearing against the second end of the link and on which the fixing means act, the clamping cap having an inside surface providing plane contact with the outside face of the second end of the link in order to maintain the second end of the link against the vane pivot without slack by means of contact between the-inclined edges.

Abstract: A device for controlling a variable-angle vane for a stator of a turbomachine compressor, the device comprising a link, connection means forming a hinge between a first end of the link and a control ring, fixing means for fixing a second end of the link on a pivot of a vane to be controlled, and pinch means acting transversely relative to a longitudinal midplane of the link to lock the second end of the link in rotation without slack on the pivot.

Abstract: An object of the present invention is to reduce the adverse effect of interference between stationary blades and moving blades on the performance of an axial-flow turbine and to provide a high-performance turbine stage.

Abstract: The present invention solves problems of securing high-temperature strength at elevated temperatures and of preventing steam leakage that arise when high-pressure, high-temperature steam is used for driving a steam turbine, and problems of preventing the occurrence of rubbing due to the suppression of the excessive elongation difference and of minimizing steam leakage from shaft seals. A double-wall casing structure is arranged at an area corresponding to stages from a high-pressure first stage (7) to a predetermined high-pressure stage arranged on an upstream side of a high-pressure final stage (8); and a single-wall casing structure is arranged at an area corresponding to stages which follows said predetermined high-pressure stage.

Abstract: The present invention provides a blade structure used in a blower to not only increase the wind pressure and gas quantity but also reduce the noise. The blade structure includes a vane group constituted by a plurality of vanes. A plurality of inclined portions is also included in the blade structure. Each of the plurality of the inclined portions is connected to each of the plurality of vanes of the vane group.

Abstract: The object of the present invention is to increase the operating ratios of turbine units. To achieve the object, supports are provided on the upper outer casing of each turbine of a turbine unit, and the upper inner casing of said turbine is temporarily placed on the supports of the upper outer casing which is temporarily placed on the operating floor. By placing them temporarily in that way, a large space can be secured for the inspection of the turbine unit, and the inspection can be carried out quickly, which increases the operating ratio of the whole plant including the turbine unit. This invention is useful mainly for turbine units and their overhaul.

Abstract: The invention is a system, device and method that captures wind energy and converts it into mechanical or electrical energy. In a system embodiment, the system transfers wind power to rotational energy. The system includes a wind capture means that uses wind to generate a mechanical force, an energy coupling means for transferring the mechanical force to a horizontally mountable wheel having a shaft coupled thereto, and an energy transfer system that couples the mechanical force from the shaft to a machine. In a device embodiment, a wheel capable of receiving wind power is provided. The wheel includes an airfoil support having a center portion, a stop location, and an airfoil location, and an airfoil is coupled to the airfoil support at the airfoil location. A method of driving the wheel uses a mounted airfoil to capture wind energy in an airflow, where the airfoil is mounted to a horizontally mountable wheel.

Abstract: A ceiling fan assembly includes a motor shell with top and bottom flanges, a motor unit disposed in the motor shell, and a suspension rod extending into the motor shell and coupled securely to the top flange. A motor is disposed in the motor shell. A plurality of fan blades are mounted on a rotor of the motor for co-rotation therewith. A vibration impeding unit is disposed above the motor shell, and includes a bracket having opposite parts that are connected securely to the bottom flange at two diametric positions relative to the suspension rod and that extend from the bottom flange to connect with the suspension rod so that vibration resulting from rotation of the rotor is impeded cooperatively by the opposite parts and the suspension rod.

Abstract: In a joining method for manufacturing a rotor blade by joining a plurality of members, the members are pressed so as to exert a predetermined pressure on the bonding interface, a pulse voltage is applied to the members to pass electric current therethrough, and the joint portion is heated by resistance heating generated at the bonding interface and in the bulk of the members to cause diffusion bonding and thereby to join the members to each other. By this method, good joining can be achieved without substantially changing the crystal structure and mechanical properties of the base metals.

Abstract: A component for use in a flow path of a gas turbine engine. The component includes a body having an exterior surface mountable in the gas turbine engine so the exterior surface is exposed to gases flowing through the flow path of the engine. The body has a cooling hole extending through the body to the exterior surface for transporting cooling air from a cooling air source outside the flow path of the engine to the exterior surface of the body for providing a layer of cooling air adjacent the exterior surface of the body to cool the surface and create a thermal barrier between the exterior surface and the gases flowing through the flow path of the gas turbine engine. The cooling hole is defined by an elongate annular surface extending through the body of the component and terminating at the exterior surface of the body. The hole has a length, a maximum width less than about 0.

Abstract: A swirling compressor comprises a number of swirling tubes and a motor, each swirling tube has a fixture at a center portion with a flange bulging out from one side and a hole at the other end of the center portion opposing the flange, an aperture is formed close to the center end at the inside of the tube, this fixture design allows the swirling tube to pile up with one over the other forming a wind passage, and a spindle of a motor is inserted through the hole and secured thereat. When the motor driven the swirling tubes set to spin, each tube collects a portion of whirlwind, and all whirlwind will be blown out from the fixture.

Abstract: The blades (1, 11, 12, 13, 1n) of a turbine or compressor are fastened into a groove (8) on the rotor (6) or stator of the turbine or compressor by means of the blade roots (4), there being no play or a prestress prevailing between the root plate (3) and/or the blade root (4), and adjacent blades (1, 11, 12, 13, 1n) thereby being supported relative to one another with respect to torsional moments (12) and not or only slightly on the rotor (6) or stator. This is possible, for example, by means of a bevel (9).

Abstract: A rotor element for a turbocompressor having at least one rotor stage supporting a series of mobile blades that do not have a platform separating the aerofoil from the root of the blade. At least one recess is provided in order to allow the engagement of the roots of the mobile blades, wherein the rotor element comprises at least two consecutive individual rings having at their lateral periphery one annular half-profile which, during the axial juxtaposition of the two individual rings, form a complete recess in which the roots of the series of mobile blades are engaged.

Abstract: A gas turbine engine has, in a cross section in the axial direction of an annular inner peripheral wall connected to a blade main body of a turbine blade, a concave part and a convex part on the front edge side and the rear edge side. The concave part has a negative curvature and is concave toward the axis, and the convex part has a positive curvature and is convex away from the axis. The flow rate on the upper face of the blade main body can be reduced in the concave part on the front edge side, thus suppressing generation of a shock wave, and the flow rate can be increased in the convex part on the rear edge side following the concave part, thus smoothly changing the flow rate on the upper face of the blade main body and thereby minimizing the pressure loss. In this way, the thickness of the blade main body can be reduced while ensuring the performance of the gas turbine engine, thereby contributing to a reduction in weight.

Abstract: A driving controlling apparatus for reciprocating compressor using resonance, uses resonance increased in the current corresponding characteristic by compensating the inductance valve of a coil turned inner part of the motor using a capacitor. A electric circuit further comprises a capacitor for compensating the inductance of the coil which is wound around the motor of the reciprocating compressing unit, accordingly, the burden of the applied voltage against the inductance is reduced, so low applied voltage can generate the stroke needed and the variation of the current hardly effect to the variation of the stroke. Therefore, stable load characteristic is maintained because the stroke variation is low even if the load variation is generated.

Abstract: Variable potential electrokinetic devices and electrokinetic multipliers used for pumping and flow control are disclosed that offer improvements in safety and design flexibility. The devices of the present invention take advantage of combinations of pumping conduits and conducting conduits to permit the use of lower operating voltages in pumps, pressure multipliers, and flow controllers. Devices having N pumping stages and 2N+1 electrodes permit the use of arbitrary voltages at the fluid connection points between the devices and other system components, further improving device safety and flexibility.

Abstract: A floating pump assembly including a compact floatation assembly structured to float on a body of water and supporting a flow pump housing having an inlet, outlet and fluid drive assembly being submerged and wherein at least the outlet is oriented in a predetermined, preferably horizontal orientation during operation and activation. A power assembly is supported on the floatation assembly and is drivingly connected to the fluid drive assembly for powered operation thereof. The predetermined orientation of at least the outlet and particularly the direction of discharge of water issuing from the outlet substantially is such as to eliminate or at least minimize the tendency of the floatation device to become disoriented or unstable at least in terms of being increasingly submerged into a deeper position within the body of water upon activation and operation of the floating pump assembly.

Abstract: The reliability of a compressor may be improved by affixing an inertia-increasing member to the drive shaft of the compressor in order to reduce the forces imposed on a mechanical coupling between the drive shaft and a compression member when the rotation of the drive shaft is initiated. A method of selecting the size and configuration of the inertia-increasing member is also provided.

Abstract: An impeller pump with thermostatically adjustable guide vanes is suitable for use as an automotive coolant pump. The pump is driven by a constant speed electric motor, and flow variation is controlled by varying the orientation of the vanes. Orientation of the vanes is effected by a wax-type thermostat, which senses coolant temperature: flow is increased when the coolant is hot, and decreased as the coolant cools. The variable guide vanes are mounted for pivoting about radial axes, and are located just upstream from the pump impeller.

Abstract: A manifold for a hydraulic system including a pump and accessories such as valves and filters as well as gauges in which the manifold is made part of the pump in fluid communication with the output to receive hydraulic fluid and deliver it to selected accessories and to return the fluid to the reservoir of the hydraulic system all with a minimum of hoses and couplings.

Abstract: An improved fan comprises a blade module and a coil module. The blade module includes a space defined therein, and a shaft. The space has a bottom where an end portion of the shaft is embedded. The coil module includes an oil-retaining bearing, an oil-retaining ring, and a shaft sleeve. The shaft sleeve has an internal flange at a top thereof. The oil-retaining bearing is mounted inside the shaft sleeve, and the oil-retaining ring is clamped between the internal flange and the oil-retaining bearing once the shaft of the blade module has penetrated through the shaft sleeve and the oil-retaining ring of the coil module. Via the oil-retaining ring, the lubricant oil is retained in the oil-retaining bearing, thereby preventing loss and evaporation of lubricant oil.

Abstract: A method for controlling a hybrid compressor system is disclosed. The hybrid compressor system includes a variable displacement hybrid compressor that is selectively driven by one of an engine and an electric motor to cool a passenger compartment of a vehicle. The method includes the steps of transmitting a demand signal to activate an electric motor drive mode of the hybrid compressor system, whereby the electric motor drives the hybrid compressor, transmitting a compressor displacement signal to the hybrid compressor to set a displacement of the compressor to a minimum level, waiting a predefined time period, activating the electric motor to drive the compressor, determining a suction pressure of a suction chamber of the hybrid compressor, determining whether the displacement of the hybrid compressor is sufficient based on the suction pressure determination, and changing the displacement of the compressor if the displacement is insufficient.

Abstract: In a fluid-pumping system comprising a pump and a pulsation dampener, which is arranged to dampen pressure pulsations, the pump is driven by air delivered at a regulated pressure. The pulsation dampener is arranged to be charged via an associated regulator, which is arranged to regulate the charging air pressure by reference to the air pressure in an averaging tank. Preferably, the pulsation dampener comprises two apertured walls, between which a diaphragm is mounted, one such wall being mounted so as to limit displacement of the diaphragm toward the air-side chamber and the other wall mounted so as to limit displacement of the diaphragm toward the fluid-side chamber. Two similar dampeners may be employed, one to dampen pressure surges and the other to dampen pressure drops.

Abstract: The present invention relates to a thick matter pump comprising at least two pump units alternating in the pump and suction mode, a delivery line, a suction line and a switching valve for switching between the pump units, one pump unit being connected in the pump mode by the switching valve to the delivery line, and one pump unit being connected to the suction line in the suction mode. The filling level of the pump unit in the suction mode is to be improved. To this end a pressure boosting device which acts independently of the pump units is provided in the area of the suction line for actively effecting a precompression of thick matter. The invention also relates to a suction/pumping method which is carried out by said thick matter pump.

Abstract: In an electrical compressor having a motor and an electrical circuit integrated with a compression portion, a part of electrical components of the electrical circuit is disposed in spaces between a cylindrical outer surface of a motor housing and an imaginary flat surface that imaginarily contacts the cylindrical outer surface. Therefore, the spaces can be used effectively, and the electrical compressor can be downsized. Further, the part of the electrical components can be effectively cooled by refrigerant in the motor housing. On the other hand, the outer surface of the motor housing is used as one surface defining an inner space of a casing for accommodating the electrical circuit. In this case, the electrical circuit can be effectively cooled by refrigerant in the motor housing.

Abstract: A fuel pump for an automotive vehicle includes a housing having an opening extending therethrough, and a piston slidably supported within the opening. A pair of end caps are mounted to the housing, thereby encasing the piston within the opening. First and second pumping chambers are defined by the opening, first and second ends of the piston, and the end caps. Each of the first and second pumping chambers has an inlet adapted to allow fuel to flow into the pumping chambers and an outlet adapted to allow fuel to flow out of the pumping chambers. A drive device is adapted to move the piston back and forth within the opening, thereby alternately increasing and decreasing the volumes of the first and second pumping chambers.