Abstract: An object is to increase precision in straightness on a journal thrust surface relative to the outer peripheral surface of the journal in a crankshaft, and in the control system for controlling the movement of a cutter in axial directions by running a control program transferred from an automatic programming apparatus, the automatic programming apparatus is provided with a machining data correcting means for correcting machining data on the basis of the data for correcting the straightness gained through comparison between the results of measurement of the machining dimensions of the journal thrust surface in the workpiece on which a cutting process has been carried out in advance and the target machining dimensions for the journal thrust surface; and a program preparing means for preparing a control program on the basis of the corrected machining data after correction of the machining data using this machining data correcting means.

Abstract: A system for removing debris generated by a cutting tool draws the debris into a mixing chamber formed in a workpiece clamp where the debris is combined with a high velocity airflow. A vacuum source draws the debris-air mixture into a cyclonic airflow extraction chamber where the mixture is accelerated before being extracted from the clamp through an exhaust channel. A clamping ring seals the area surrounding the cutting site so that air velocity in the mixing chamber is increased and debris is accelerated into the extraction chamber.

Abstract: The present invention is directed to an elevating mechanism, in particular to an elevating mechanism for routers, is configured for easy micro adjustment and coarse or macro adjustment. In an embodiment, a power tool includes a base configured to adjustably receive a motor housing for operating a working tool. A worm drive is pivotally coupled, in an eccentric configuration, to an eccentric lever. The eccentric lever is adjustably coupled to at least one of the housing or the base such that the eccentric lever is operable to cause the worm drive to be positioned into an engaged position with a rack assembly and a released position wherein the worm drive is remote from the rack assembly. The elevating mechanism is operable to permit rotational micro adjustment and macro manual adjustment wherein the worm drive is remote from the rack assembly for permitting coarse adjustment of the motor housing with respect to the base.

Abstract: An expansion dowel includes an anchor bolt (12) having a load application element (16) at a first end region (14) of the anchor bolt (12), and an expansion part (17) at a second free end region (15) of the anchor bolt (12), and an expansion sleeve (21) having an inner profile (22) with a region (23) having a surface roughness increasing in the direction of the first end region (14) of the anchor bolt (12), with the expansion part (17) having a conical section (18) widening toward the second free end region (15) of the anchor bolt (12) for expanding the expansion sleeve (18).

Abstract: A fastener assembly for securing a heat dissipation device to a CPU mounted on a printed circuit board, includes a sleeve, a bolt, and a coil spring. The sleeve includes a hollow body, a top head and a pair of lower resilient flat extensions. The resilient flat extension has a barb projecting outwards therefrom and is deformable radially. The bolt includes a shaft, a joining part at an end thereof and a threaded part formed at an opposite end thereof. The shaft is received in the hollow body of the sleeve with the joining part fastened to the hollow body, whilst the threaded part projects out of the hollow body. The coil spring surrounds the sleeve and is held between the head of the sleeve and the barbs of the sleeve; the coil spring is deformable axially along a length of the sleeve.

Abstract: A threadlike retainer cord is used to bring a self-drilling and slotting flat nut inserted through a wall into position with the hole in the surface for a screw to mate with the threads in the nut. The nut has an elongated drilling point with serrated teeth along an elongated side. The drilling point makes a hole wide enough for the matting screw and is long enough to go completely through the wall. The serrated teeth on the elongated section are used to make horizontal slots on each side of the hole to accommodate the full width of the nut. The resulting slotted hole is clean and provides a smooth and uniform surface on the inner surface of the wall for the nut to rest against. This fastening system provides a simple way to fasten objects onto walls without having access to both sides. The retainer cord has elongated ends that are larger than the holes they are put through. The nut is put through the slotted hole in the wall and rotates 90 degrees after dropping through the hole.

Abstract: A fastening element for a hard constructional component (6) includes a base body (12; 22; 42) extending along a longitudinal axis (19; 29; 49), a self-tapping thread (13; 23; 43) provided, at least regionwise, on the base body (12; 22; 42) and a height of which extends radially outwardly from the outer surface (18, 28, 48) of the base body (12; 22; 42), and at least one groove (16, 26, 45, 46, 47) provided on the base body (12; 22; 42) and a depth (T1, T2) of which extends radially inwardly from the outer surface (18; 28; 48) of the base body (12; 22; 42) and which is axially spaced from the self-tapping thread (13; 23; 43).

Abstract: Disclosed is a fix bolt-unfastening preventing structure. The fix bolt unfastening structure includes a fix bolt including a head designed to be fitted to a fastener tool, and a body integrally formed with the head, wherein the body has a threaded portion on a circumferential surface thereof and a press fit portion formed at one end thereof; and a fix member having a press fit hole into which the press fit portion is to be press-fitted. According to the present invention as described above, there is an advantage that in order to prevent unfastening of the fix bolt which is used for connection of various components, the fix bolt is threaded engaged with the fix member while the press fit portion formed at the end of the male screw thread of the fix bolt is press-fitted into the press fit hole formed at an end of the fix member, which enables the reduction of parts and cost and the prevention of unfastening of the fix bolt.

Abstract: The present invention in particular to provide screw thread divided into the first and second thread section. A plurality of slots disposed on each of first thread section, which divided into a plurality of thread segments, wherein each of the thread segment have a first inclined surface and second inclined surface on two ends thereof; the first inclined surface paralleling and incline to the second inclined surface. Accompanying with the thread peak of second thread section formed as sawtooth-shaped; therefore, during the operation, utilize the second inclined surface guiding, the first inclined surface to sharp cutting and remove off the cutting debris, hence to attain the lower screwing resistance, enhance the screwing speed and the tightness effects.

Abstract: A system, apparatus and method are described for an anti-theft tack having non-snag grooves. The anti-theft tack may be for a security tag, such as an electronic article surveillance security tag. Other embodiments are described and claimed.

Abstract: A fastening device includes a main body and a first wedging part extending from the main body and fastened onto a first element. A pin passes through the main body. One end of the pin contacts the back surface of the first wedging part, and the second end of the pin has a second wedging part that is fastened onto a second element. Thereby, the first wedging part and the wedging fastening part fasten the second element on the first element firmly. The structure of the fastening device is simple, and the fastening effect is good.

Abstract: An adhesive washer for a toilet seat fastener assembly which can be easily installed in the toilet seat fastener assembly without having to cope with the problem of slipping bolts and nuts as they will be securely adhered together. An adhesive toilet seat washer in accordance with the present invention comprises a washer material having an adhesive on at least one side of the washer for adhering to the fastener and holding it in place. In practice, a toilet seat is positioned such that the hole on the toilet seat hinge is directly above the hole on the outer wings of the commode bowl basin and a fastener is inserted through both of the holes in the toilet seat hinge and the commode bowl basin. The washer then is secured against the bottom of the commode bowl basin hole and the fastener, and the adhesive on at least one of the surfaces of the washer acts to hold the fastener in position, thereby maintaining the tightness and security of the fastener assembly.

Abstract: An adjustable document file binding device includes a binding seat and at least one binding element, wherein the binding element is slidably mounted in the binding seat to form a space for holding files by fasteners. The binding seat is a rectangular frame constituted by a bottom wall, a rear wall perpendicular to the bottom wall and two side walls at edges of the bottom wall and the rear wall, which opens in two directions. The binding element is a U-shape body corresponding to the binding seat. One or plurals of retractable and detachable connectors are mounted between the binding seat and the binding elements for binding loose leaves. When two binding elements are used, the binding device forms at least two spaces for receiving files. Therefore, the device is adapted to bind loose leaves and other files concurrently.

Abstract: To produce can bodies, a continuous can jacket is disclosed, that is sealed by way of a first joint is produced from a flat metal material. At least one sealing element is mounted on the continuous can jacket by way of an additional joint. At least one of the additional joints is configured as a laser welding seam, which forms an annular continuous sealing seam between the continuous can jacket and the sealing element(s). Before the sealing seam is welded, complementary seam contact surfaces of the can jacket and the sealing element are configured as annular continuous edge regions that flare out of narrow towards the can axis. To weld the sealing seam, the can jacket and the sealing element(s) are pushed together until the edge regions make contact, one of the end faces of the two edge regions lying on the interior of the can body and the other lying on the exterior of the body.

Abstract: Method for manufacturing a metal container including a metal body part, a metal bottom part and optionally a top part. The method includes steps of: providing a metal body part with a closed circumferential wall; providing a metal bottom part with a flanged edge, the outside of the flanged edge corresponding to the inner side of the body part at the location where the bottom part is to be connected to the body part; placing the bottom part within the body part at the location; and folding the outer end of the body part that extends beyond the flanged edge of the bottom part inward against the inside of the flanged edge of the bottom part. Furthermore, sealer is provided to ensure a liquid- and airtight seal between body part and bottom part, which sealer is included in a coating applied on the bottom part and typically activated by heating.

Abstract: A can end member has a center panel, a circumferential chuck wall, and a transition wall. The center panel is centered about a longitudinal axis and has a peripheral edge. The center panel also has a step portion located radially outwardly from the longitudinal axis. The step portion has an annular convex portion joined to an annular concave portion and displaces at least a portion of the center panel vertically in a direction parallel to the longitudinal axis. The curl defines an outer perimeter of the end member. The circumferential chuck wall extends downwardly from the curl to the transition wall. The transition wall connects the chuck wall with the peripheral edge of the center panel. The transition wall has a folded portion extending outwardly relative to the longitudinal axis.

Abstract: Systems for transporting an article using horizontal belts are described. Transport sections include a first horizontal belt and a second horizontal belt, and the belts are separated by a distance configured for placement of the article between them. A plurality of horizontal rollers is configured to guide the belts, and a plurality of support protrusions extends from each of the belts. The protrusions are configured to support a weight of the article. Methods for conveying articles using horizontal belts are described. Methods for loading, unloading, and changing the conveyance path of articles are described.

Abstract: A conductive member supply apparatus including a reservoir portion containing an internal space in which the conductive members are stored and a first gas-passing aperture communicating with the internal space, an alignment portion including an alignment path in which the conductive members are arranged in a row and which communicates with the internal space, and a second gas-passing aperture communicating with the alignment path, a stopper for closing/opening the alignment path, first gas supply unit which supplies gas to the alignment path from the first gas-passing aperture and through the internal space, second gas supply unit which supplies gas to the aligning direction of the conductive members from the second gas-passing aperture, and control unit which activates the first gas supply unit to supply gas in a state where the stopper is closed, wherein a distance between the second gas-passing aperture and the stopper along a direction of the alignment is substantially within a range of from a dimension o

Abstract: The present invention provides a plate material carry-out device that can prevent a possible delay in carrying out a plate material even if the plate material requires only a short processing time, improving cycle time, the plate material carry-out device also requiring only a simple configuration. A plate material carry-out device carries out a processed plate material W from a plate material processing machine 1 to a plate material carry out section 3. The plate material carry-out device includes a plurality of tracks 11, 12 installed parallel to one another between the plate material processing machine 1 and the plate material carry-out section 3, and traveling members 13, 14 independently provided on the respective tracks to reciprocate between the plate material processing machine 1 and the plate material carry-out section 3. Each of the traveling members 13, 14 has plate material holding means 16 holding a plate material W on the plate material processing machine 1.

Abstract: An installation and method for rapidly and efficiently unloading material from bulk bags in an unloading station surrounded by an air lock enclosure while the bags move suspended from a closed look conveyer in continuous progress from a loading station to said unloading station then through a bag dumping station. The material is dumped on an air slide and directed into a trough from which it is conveyed to a temporary tank before being repackaged in smaller containers or otherwise distributed.

Abstract: A motorcycle hauling stabilizer for transporting motorcycles in a pickup truck bed. A flange on the motorcycle hauling stabilizer wraps snugly over the top of a truck bed wall. The flange secures the motorcycle hauling stabilizer in the truck bed and reinforces the bed wall, preventing the bed wall from bending when a motorcycle is strapped in. A motorcycle is secured for transport by pushing its front wheel between two wheel stabilizers which keep the front wheel and thus the rest of the motorcycle upright. The motorcycle hauling stabilizer preserves a truck bed's cargo area because it protrudes only slightly in to the truck bed. Thus, it does not need to be removed when not in use.

Abstract: There is disclosed an apparatus and method for moving with an excavator arm a trench box having a pair of adjacent spreader bars at a forward end. The apparatus has a bracket end for connecting to the excavator arm and a hooking fork. The hooking fork has a first surface that engages the first spreader bar of the trench box. The apparatus also includes a second surface for engaging the adjacent second spreader bar when used to lift the trench box from the trench or move the trench box along the trench floor.

Abstract: A load arm for a fork of a low lift industrial truck, with an arm frame which is approximately U- or C-shaped in cross section with upward pointing bridge and downward pointing legs and an arm tip, which is connected to the arm frame via a welding connection, wherein the arm tip, tapered towards the free end, has bearing openings for the bearing of a load roller and introduction and withdrawal surfaces on the lower side, which ascend or fall off, respectively, towards the free end of the arm tip with respect to the lower edges or brims of the arm frame, and wherein the arm tip has an abutting surface at the rear end, which abuts against the blunt end of the arm frame, wherein the arm tip is formed by an integral piece of cast material, the arm tip has arm sections on the end facing the arm frame, which extend below the associated edges or brims of the arm frame and sit snugly on the lower edges or brims of the arm frame when arm frame and arm tip cling together, and the withdrawal surfaces are provided on the

Abstract: A method of transferring groups of cigarettes on a packing machine, whereby a group of cigarettes, as it travels along a first path, is arrested in a pickup position inside a transfer station, in which a gripper device, after being closed about the group of cigarettes, is moved in a given transfer direction to transfer the group of cigarettes from the pickup position to a release position along a second path, and is opened to release the group of cigarettes in the release position.

Abstract: A method for the quick palletization of objects (100), comprising the steps of: arranging objects (100) to be palletized organized on a collection plane (400); loading said objects (100) onto a flexible support plane (31) suitable for advancing in the direction of transfer of the objects (100) in a position substantially coplanar to the collection plane (400) and in continuation of it, so that the support plane (31) receives said objects without sliding; transferring said objects (100) from the support plane (31) to a flexible moving plane (21) that can slide coplanar to the support plane (31) so as to replace the latter (31) below the objects (100) whilst they remain stationary, in which the transfer takes place by synchronously activating the harmonious sliding of the support plane (31) and transfer plane (21) arranged in contact with each other in continuation of one another; taking the transfer plane (21) with the objects (100) on top above a pallet; making the transfer plane (21) slide under the obj

Abstract: A kinematic pin and a substrate carrier adapted to deter dislodgment of the substrate carrier from the kinematic pin are provided. A shear member on the kinematic pin interacts with a shear feature of the substrate carrier to deter lateral movement of the substrate carrier relative to the kinematic pin. A substrate carrier handler that employs the kinematic pin is also provided.

Abstract: A bleed valve for a gas turbine engine, the valve comprises a diffuser having a plurality of holes through which a bleed fluid flows and into a fluid stream. The diffuser is characterised in that at least some of the holes are at least partially tangentially angled relative to the bleed fluid flow through the valve so that the bleed air forms a vortex to enhance mixing with the fluid stream.

Abstract: A controllable transmission system and a method thereof are provided. The controllable transmission system includes a first rotation device, a coupling device and a control device. The first rotation device includes a transmission shaft, a rotation body and a plurality of blade units connected with the rotation body, wherein each of the blade units includes an adjustable blade having a first and a second contact elements and having an opening corresponding to the adjustable blade. The coupling device is mounted beside the rotation device and includes a coupling unit having a first and a second contact surfaces. The control device is connected with the coupling device for controlling a movement of the coupling device to cause one of the contact surfaces positioned corresponding to a respective one of the first contact element and the second contact element.

Abstract: A variable geometry inlet guide vane assembly that reduces stress placed on downstream compressor blades in gas turbine engines. The invention circumferential leans upstream guide vanes, pushing engine core air flow radially. This allows for aerodynamic stresses on the downstream blades to be reduced. The invention overcomes the difference in movement between a unison ring and a vane arm by providing a hinge in conjunction with a spherical bearing that couples to the unison ring.

Abstract: A system in a steam turbine for removing water droplets from the flowpath of a steam turbine that may include a groove for collecting water droplets, and a plurality of moisture removal holes originating within the groove. The groove may run in a circumferential manner around an outer sidewall of the steam turbine, be axially positioned upstream and in close proximity to the leading edge of a nozzle, and have a gradual slope at a leading edge and a steep wall at a trailing edge. The moisture removal holes may be a channel through the outer sidewall through which the water droplets that collect in the groove may flow.

Abstract: A singlet welded nozzle hybrid design that includes a singlet, that is, a single airfoil with respective inner and outer sidewall components. The outer sidewall component is received in a radial and circumferential groove of an outer carrier. The connection of the inner sidewall can be achieved by mechanically fitting and welded the inner sidewalls to either a seal carrier or a small ring, or a small radial weld may be provided between the sidewall endfaces of circumferentially adjacent singlets.

Abstract: A turbine airfoil usable in a turbine engine and having at least one cooling system. At least a portion of the cooling system may be positioned in an endwall attached to the turbine airfoil. The endwall may include an endwall horseshoe cooling slot positioned in the first endwall proximate to the leading edge of the airfoil such that one end terminates proximate to the pressure side of the generally elongated hollow airfoil and a second end terminates proximate to the suction side of the generally elongated hollow airfoil. The endwall horseshoe cooling slot may include a plurality of film cooling holes angled to create a film cooling layer to reduce airfoil and endwall temperatures at the intersection between the leading edge of the airfoil and the endwall.

Abstract: A heat accumulation segment for local separation of a flow duct inside a turbo engine, from a stator housing that radially surrounds the flow duct is provided. The heat accumulation segment includes two axially opposed joining contoured elements that are engageable with two components that are axially adjacent along the flow duct. A first one of the two joining contoured elements has a radially oriented recess with a conical contoured surface against which a securing pin having a conical external contour that acts radially under force action from a component that adjoins the first joining contoured element, and the first joining contoured element has a collar portion having a radially upper collar surface and a radially lower collar surface. The collar portion is connected within a counter-contoured receiving contoured element in the axially adjacent component by a joining force that acts between the securing pin and the conical contoured surface.

Abstract: A heat accumulation segment for local separation of a flow duct inside a turbo engine, from a stator housing that radially surrounds the flow duct is provided. The heat accumulation segment includes two axially opposed joining contoured elements that are engagable with two components that are axially adjacent along the flow duct. A first one of the two joining contoured elements has a radially oriented recess with a contoured surface against which a securing pin having an external contour complementary to the contoured surface acts radially under force action from a component that adjoins the first joining contoured element. The first joining contoured element has a collar portion having radially upper and lower collar surfaces, and the collar portion is connected within a counter-contoured receiving contoured element in the axially adjacent component by a joining force that acts between the securing pin and the conical contoured surface.

Abstract: A method of fabricating a turbine rotor is provided. The method includes fabricating a plurality of substantially cylindrical disks. Fabricating each disk includes fabricating a substantially cylindrical body and extending a bore substantially concentrically through the body. The method also includes coupling at least two of the plurality of disks together to form a rotor having a bore extending axially therethrough.

Abstract: The present invention relates to a compression chamber unit (1) of an air pump, comprising a cylindrical body part (3) provided with at least one outlet nozzle (4), a number of connecting flanges (6) and a number of connecting bosses (7), wherein the cylindrical body part (3) is an extruded cylinder and a cap (2) is formed with outlet nozzle (4), connecting flanges (6) and connecting bosses (7), where the cap (2) is adapted to engage with a first end part (10) of the cylindrical body part (3). The present invention further more relates to a method for forming a compression chamber unit (1) which method comprises the following steps: the cylindrical body part (3) is extruded, and the cap (2) is moulded onto the cylindrical body part (3).

Abstract: An impeller structure for a centrifugal fan device is disclosed, in which the impeller structure is primarily comprised of: a disc; and a plurality of blade structures, each being arranged on the disc; wherein, each blade structure further comprises: a first blade; and a second blade, arranged at a circumferential length away from a side of the first blade while radially overlapping with the radial of the first blade by a specific overlap area for forming a gap passage functioning as a nozzle. As a fluidic is flowing through and shooting out of the gap passage, not only the growth of the boundary layers on the suction surfaces of front blades are interrupted, but also as the fluidic with high kinetic energy is mixing with the low-kinetic fluidic flowing on the suction surfaces of rear blades, the thickness of the boundary layer is reduced while the separation point is delayed and thus separation can be prevented.

Abstract: An integrated duct, baffle and knife edge seal arrangement employing the radially inner distal edge of the baffle for sealing the radially inner stator/rotor interface of an inter-stage cavity.

Abstract: What is described is a turbine guide vane having a guide vane leaf and with a radially outer platform connected to the guide vane leaf and having a platform surface which faces radially away from the guide vane leaf and on which a connecting structure is provided for fastening the guide vane to a supporting structure which has side wall portions which project radially beyond the platform surface and delimit an inner cavity and on which is provided at least in portions a joining contour which can be inserted into a reception shape countercontoured within the supporting structure. At least one seal is provided between the connecting structure and the supporting structure.

Abstract: The ventilation unit has an electric motor, the output shaft of which is fitted with a fan having a cup-shaped central body and a number of blades. The central body is defined by a base wall, and by an annular wall from whose outer face the blades extend. And the main characteristic of the present inventive subject matter lies in through windows being formed in the annular wall of the central body to channel out, in use, any condensate formed inside the central body.

Abstract: The present invention provides an axial flow fan capable of increasing an air volume and a static pressure more than conventional axial flow fans, and also capable of reducing generation of noise. A guide wall portion 33 is provided to form a guide groove 31 between the guide wall portion 33 and one stationary blade 11. The one stationary blade 11 is disposed in the vicinity of a lead wire engaging portion 25 provided at a housing 3. The guide groove 31 receives a plurality of lead wires 10 and guides the lead wires 10 to the lead wire engaging portion 25. When the guide wall portion 33 is provided and the lead wires 10 are received in the guide groove 31, presence of the lead wires 10 may have less adverse effect on the air volume and the static pressure, and may generate less noise.

Abstract: A turbomachine (1), in particular a gas turbine, has a stator (2) and a rotor (3) and with at least one axial sealing device (6) arranged between them. On the stator side, the sealing device (6) has a radially stepped sealing contour (8) with regions (9, 10) projecting and retracting in the direction of the rotor (3), on the rotor side a plurality of sealing fins (11) projecting in the direction of the stator (2) being arranged, which engage in each case into adjacent retracting regions (10) of the stator-side sealing contour (8). On the rotor side, at least one additional fin (12) projecting in the direction of the stator (2) is provided, which is positioned between two adjacent sealing fins (11) arranged on the rotor side and which lies opposite a projecting region of the stator-side sealing contour (8).

Abstract: A wind turbine system for producing compressed air from wind energy. The wind turbine harvests energy from wind to produce mechanical energy. A compressor receives mechanical energy from the wind turbine to compress air to an elevated pressure. Thermal energy may be removed from the air, and the air is stored in a storage devices, such that the air may be released from the storage device on demand.

Abstract: A small wind power installation of between about 50 and 150 kW nominal power, which can be set up practically at any location in the world as independently as possible of intensive machine support. A wind power installation is disclosed with a plurality of installation parts such as rotor, generator, machine casing and pylon, wherein the installation parts are disposed in at least one container during transport to the building site of the wind power installation and are assembled to form a wind power installation at the location of construction of the wind power installation, wherein the container is such that it accommodates the pylon of the wind power installation and forms the foundation of the wind power installation when sunk into the ground.

Abstract: A conformal seal (20) for sealing air flow between a cooling airflow path and a hot gas flow path within a combustion turbine engine. The conformal seal (20) may be fitted within cooperating side slots of adjacent vane segments (10) within the combustion turbine engine. The conformal seal (20) may include an elongated metallic substrate (22, 40) forming an upper surface and a lower surface. A conformal coating (26, 44) may be deposited over one or both surfaces of the substrate (22, 40). The conformal coating (26, 44) may be deposited to a depth so that a point contact between the conformal coating (26, 44) and respective interior walls of the side slots wears the conformal coating (26, 44) to establish surface area contact there between. The surface area contact improves a sealing function between the conformal coating (26, 44) and the respective interior walls during operation of the combustion turbine engine.

Abstract: A rotor for a wind turbine includes a rotation shaft having a first flange and rotatably supported on a support frame; a single disc installed on the rotation shaft; wind guide parts defined through the disc to guide wind blowing on surfaces of the disc; first wind collecting parts formed around the wind guide parts on the surfaces of the disc to collect wind blowing on the surfaces of the disc; second wind collecting parts secured to the rotation shaft and the disc to collect wind; a first universal coupling having one end on which a second flange is provided to be coupled to the first flange and the other end which is formed with internal splines; and a propeller shaft having one end which is formed with external splines engaged with the internal splines and the other end which has a third flange and a second universal coupling.

Abstract: A turbine rotor disc includes a plurality of attachment slots for receiving firtree-profiled blade roots. Each attachment slot is formed in an undulating profile having substantially smoothly curved and laterally, alternately recessed and projecting portions. At least one pair of substantially smoothly curved projecting portions being truncated at a tip thereof, respectively.

Abstract: The invention relates to a propeller blower for axial outflow of suctioned air by means of an impeller disk (2) which is adjacent to the inside of the flow channel, said impeller disk comprising convex blades (1). The blades (1) are embodied as shell blades with elongate extensions. An end region (20) is connected to the impeller disk (2) in the area of penetration. The other end (21) extends in radial manner towards the outside and has increasing radial distances with the axial components in the direction of flow.

Abstract: An axial fan which includes a hub portion having the rotational center thereof and blades arranged on the outer periphery of the hub portion is equipped with a thickness reinforcing portion which extends from the joint portion between the blade front edge portion of the blade and the hub portion to the outer periphery of the blade along the blade front edge and whose width and thickness are smaller as the distance from the rotational center of the hub portion is larger. Furthermore, the axial fan is equipped with an additional blade. There is achieved an arc corresponding to the overlap portion between the blade and a circle of a first radius which passes from the blade front edge side of the blade to the blade rear edge side and has as the center thereof any reference point displaced from the rotational center on a plane vertical to the rotational axis of the hub portion and the blade.

Abstract: A cooling system for a turbine airfoil of a turbine engine having suction and pressure side serpentine cooling channels formed between an internal support core and an outer wall of the turbine airfoil. The suction and pressure side serpentine cooling channels may be formed from legs extending in a general chordwise direction between leading and trailing edges of the airfoil. The suction and pressure side serpentine cooling channels may receive cooling fluids from a cooling fluid supply source through a cooling fluid inlet, pass the cooling fluids through the cooling system and exhaust the cooling fluids through a cooling fluid exhaust orifice proximate to the tip section. The cooling system is particularly suitable for use with low cooling fluid flow.