Abstract: An impeller for a centrifugal blast wheel machine includes a hub provided at one end of the impeller, with the hub being configured to be coupled to the motor. The impeller further includes a tapered section provided at an opposite end of the hub, with the tapered section defining a media inlet to receive blast media. The impeller further includes a plurality of drop-shaped vanes positioned between the hub and the tapered section. The plurality of drop-shaped vanes is spaced from one another on peripheries of the hub and the tapered section. The plurality of drop-shaped vanes defines a plurality of impeller media outlets constructed and arranged to allow egress of blast media upon rotation of the impeller. Each vane is drop-shaped having a leading side directed toward a direction of rotation of the impeller and a trailing side opposite the leading side.

Abstract: A shot blasting wheel for use with a shot blasting machine configured to propel abrasive shot against a workpiece. The shot blasting wheel includes a circular body member defining a plurality of slot openings a front surface defines a plurality of slots. Each slot and slot opening has a dovetail configuration. The shot blasting wheel includes a plurality of blade assemblies, each including a paddle positioned in a respective slot via insertion through a respective slot opening. Each blade assembly also includes a locking lever pivotally coupled to the body member and pivotally movable between a locked configuration preventing removal of the paddle from the respective slot and a released configuration allowing removal. Further, each blade assembly includes a dual spring assembly having a lever spring tensioned and biased for movement between extended and released configurations and having a paddle spring configured to resist a paddle lug.

Abstract: An impeller manufacturing method includes: integrally forming an impeller by an additive manufacturing method using a metal powder, the impeller including a disk which has a disk shape about an axis, a plurality of blades which are formed on a surface facing a first side in an axial direction of the disk with gaps therebetween in a circumferential direction about the axis, and a cover which covers the plurality of blades from the first side in the axial direction; processing the integrally formed impeller by a hot isostatic pressing; and causing a polishing fluid containing abrasive grains to flow through a flow path formed between the disk, the cover, and the blades in the impeller after the processing with the hot isostatic pressing and while pressurizing the polishing fluid to perform fluid polishing.

Abstract: The present disclosure relates to a vertical shaft impact crusher comprising a rotor having a rotor protection layer which consists of particles of objects to be crushed. The rotor includes at least: a rotor upper plate comprising a rotor upper plate hole, which is an inlet for the object for crushing which is inserted into the rotor; a rotor lower plate disposed to be separated from the lower portion of the rotor upper plate; a rotor upper plate; a rotor side wall disposed between the rotor upper plate and the rotor lower plate and coupled to the rotor upper plate and the rotor lower plate, the rotor side wall being disposed at a position spaced from the rotation center of the rotor; and a circular hole which is formed on the rotor side wall and is an outlet for the object for crushing accelerated by the rotor to come out of the rotor.

Abstract: A centrifugal blast wheel machine comprises a housing and a wheel assembly coupled to the housing. The wheel assembly has a plurality of blades configured to throw blast media introduced into the wheel assembly against a work piece. According to one embodiment, each blade of the plurality of blades includes a curved portion positioned adjacent a central hub of the wheel assembly, and a straight portion integrally formed with the curved portion extending radially outwardly from the wheel assembly. According to another embodiment, each blade includes a first side rail extending along the blade, the first side rail having a first recess, and a first grommet positioned in the first recess.

Abstract: A wheel assembly for a centrifugal blast wheel machine includes a blast wheel and several blades configured to throw blast media introduced into the blast wheel against a work piece. Each blade includes a first side having a first rail portion that extends along a length of the first side and a second side having a second rail portion that extends along a length of the second side. Each rail portion has a locking member positioned on an outside surface of the rail portion adjacent a first end of the blade. Each rail portion further has a contact surface that is configured to engage a surface of a seat of the blast wheel. Each blade further includes a positioning knob located on the first contact surface to prevent the blade from inadvertently being removed from the seat.

Abstract: The present invention is a side plate unit (10) used in a centrifugal projector (1) which projects projection material (2) toward a processing target by rotating a plurality of blades (3), and the side plate unit (10) being provided to attach the plurality of blades thereto, the side plate unit (10) comprising: a pair of side plates (11); and a joining member (12) for joining the pairs of side plates; wherein guide channel portions (13) are respectively formed on mutually opposing surfaces of the pair of side plates (11); and the side plate guide channel portions (13) are formed to be pitched so that the radial outer side thereof is positioned to a rear in the rotational direction (R1) compared to the radial inner side thereof.

Abstract: The present invention is a centrifugal projector (1) for projecting projection material (2) toward a processing target, comprising a side plate (11), a plurality of blades (3) attached to the side plate, a rotary shaft (14) for rotating the side plate and the blades, and an introducing part (32) for introducing the projection material between the blades; wherein the blades (3) includes a projection surface (3a) for projecting the projection material, and the projection surface (3a) has a first part (3b) being a radial inner part of the blade and a second part (3c) being a radial outer part of the blade; the first part (3b) is formed to be pitched so that a radial outer side (3e) of the first part is positioned to a rear in the rotational direction (R1) compared to a radial inner side (3f) of the first part, and the second part (3c) of the blade is formed to be positioned to a front in the rotational direction (R1) of an imaginary line (L1) which extends the first part (3b) of the blade toward a radial outer s

Abstract: The present invention is turbine generator capable of integration into a bio-physiological or microfluidic system. The generator can convert biomechanical energy into electrical energy by using electromagnetic subsystems to transform the kinetic energy to electricity. These systems have the potential to convert hydraulic energy (such as flow of body fluid, blood flow, contraction of blood vessel, dynamic fluid in nature) into electric energy that may be sufficient for self-powering nano/micro devices and systems, such as artificial organs, valves, sensors, micro motors, and micro robots. The system incorporates a new turbine model having, notched blades; a rotor in levitation; and a special casing capable of integration into a bio-physiological or microfluidic system.

Abstract: Disclosed is a turbine for a machine for projecting abrasive for the surface treatment of objects. The turbine includes a first flange and a second flange, at least one blade element provided with a guide surface for receiving, guiding and projecting the abrasive, and a mounting system for releasable mounting of the blade element on the flanges. The mounting system includes a support element arranged between the blade element and the flanges and configured for a releasable mounting on the flanges and for supporting the blade element.

Abstract: A rotor assembly is provided for blast processing. The rotor assembly includes multiple lofting elements to create a vortex to loft particulate material to be used to process a target, and multiple impelling elements to project the particulate material toward the target. The rotor assembly is enclosed within an operating chamber that has a target area into which the particulate material is projected to strike the target. There may further be angled deflectors at the opening to direct particulate material back toward the rotor assembly to use the material for further processing. Certain components are easily adjustable for different sizes and shapes of target. The action of the rotor assembly enables the use of up to 100% pure grit for entire cleaning processes, and provides single pass hook profile on any common material surface.

Abstract: A rotor assembly is provided for blast processing. The rotor assembly includes multiple lofting elements to create a vortex to loft particulate material to be used to process a target, and multiple elements to project the particulate material toward the target. The rotor assembly is enclosed within an operating chamber that has a target area into which the particulate material is projected to strike the target. There may further be angled deflectors at the opening to direct particulate material back toward the rotor assembly to use the material for further processing. Certain components are easily adjustable for different sizes and shapes of target. The action of the rotor assembly enables the use of up to 100% pure grit for entire cleaning processes, and provides single pass hook profile on any common material surface.

Abstract: A method and apparatus for connecting a blade to a single sided wheel plate or a pair of interconnected wheel plates. The assembly provides a repeatable, positive and even positioning location for each blade. It utilizes an ellipse that tapers outwardly from the center of the wheel along the blade connecting member that corresponds with the connecting channel on the wheel. The ellipse provides for equal and uniform contact on the entire blade connection to firmly hold the blade in place without parallel surfaces. The ellipse design provides a measured and increasing improved release in that all surfaces of the ellipse are tapered with non-parallel surfaces such that blade retention and blade removal is dramatically simplified.

Abstract: A method and apparatus for inserting blades into a centrifugal blasting wheel to install blades without injury to fingers or hands. The apparatus uses a rotatable blade retainer with a blade guide slot that allows each blade to be installed through the blade guide slot while other installed blades are supported by the outer surface of the rotatable blade retainer. Once all blades are safely installed, the center section of the centering plate is inserted to cover the rotatable blade retainer.

Abstract: A machine for centrifugally shooting abrasives that shoots the abrasives by rotation of an impeller is provided. In the machine, the impeller comprises a pair of disc-shaped side plates that face each other at a predetermined distance and a plurality of blades disposed between the side plates in the radial direction of the side plates. The impeller is mounted on a hub that is fitted into an output shaft of an electric motor. The impeller is covered by a cover. The side liner and blades of the machine can be easily replaced. A side liner 3 that is U-shaped with the longer side facing downward is detachably attached to the inner side of the cover 2. The upper part of the side liner is divisible into two parts. The side liner protects the side wall of the cover 2 from the abrasives that are shot from the impeller. The side liner has a U-shaped cross section. The impeller 1 is fixed to the hub 4 by screwing a bolt 15 on the hub 4 from the inner sides of the side plates 11.

Abstract: A method and apparatus for inserting blades into a centrifugal blasting wheel to install blades without injury to fingers or hands. The apparatus uses a rotatable blade retainer with a blade guide slot that allows each blade to be installed through the blade guide slot while other installed blades are supported by the outer surface of the rotatable blade retainer. Once all blades are safely installed, the center section of the centering plate is inserted to cover the rotatable blade retainer.

Abstract: A method and apparatus for connecting a blade to a single sided wheel plate or a pair of interconnected wheel plates. The assembly provides a repeatable, positive and even positioning location for each blade. It utilizes an ellipse that tapers outwardly from the center of the wheel along the blade connecting member that corresponds with the connecting channel on the wheel. The ellipse provides for equal and uniform contact on the entire blade connection to firmly hold the blade in place without parallel surfaces. The ellipse design provides a measured and increasing improved release in that all surfaces of the ellipse are tapered with non-parallel surfaces such that blade retention and blade removal is dramatically simplified.

Abstract: A method of deburring channel inlet edges inside a cavity of a gas diffuser case is disclosed. The diffuser case has a plurality of channels each having an inner surface and an inlet edge defining an inlet of the channel. The surfaces of adjacent channels co-operate to provide said inlet edge therebetween. The inlet edges of the channels are provided in an inwardly facing circular array around a central axis of the gas diffuser case. The method comprises: inserting a tool head having at least one nozzle in the cavity of the gas diffuser case; and then ejecting abrasive particles from at least one nozzle towards at least one of the channel inlet edges of the gas diffuser case to at least one of decrease a radius of at least one said edge and improve a smoothness of at least one said surface.

Abstract: The shot-blasting machine for surface treatment of products comprises a base frame, a containing chamber for containing at least a product to be treated associated to the base frame and provided with at least an access opening, one or more projecting organs associated internally of the chamber for projecting a flow of shot-blasting particles onto the product, and automated unloading means associated to the base frame which cause the product to exit from the chamber through the access opening.

Abstract: The invention relates to a spinner gate housing (100) comprising an outer housing (10) consisting of at least one covering element (15), at least one bottom element (16), two front wall elements (11, 12) and two trapezoidal lateral wall elements (13, 14) which are arranged at a distance from each other and encompassed b said front wall elements. At least one of the lateral wall elements (13, 14) comprises a recess for receiving a guiding sleeve. A guiding sleeve cover (40) is pressed against the lateral wall element (14) by means of at least three claw devices (50) fixed to the lateral wall element next to the recess for receiving the guiding sleeve and/or the bottom element (16) is connected to a base baring element (17) by means of a plurality of claw devices (70), said base bearing element to be fixed to a blasting compartment or a foundation.

Abstract: A spinner wheel housing (100) comprises an outer housing (10) having at least one covering element (15), at least one bottom element (16), two front wall elements (11, 12) and two trapezoidal lateral wall elements (13, 14) which are arranged at a distance from each other and encompassed by the front wall elements. At least one of the lateral wall elements (13, 14) has a recess for receiving a guiding sleeve. A guiding sleeve cover (40) is pressed against this lateral wall element (14) by means of at least three clamping claw devices (50) which are fixed to the lateral wall element next to the recess for receiving the guiding sleeve and/or a bottom support element (16). The bottom element is connected to a base support element (17) by means of a plurality of clamping claw devices (70). The base bearing element is adapted to be fixed to a blasting compartment or a foundation.

Abstract: A method is provided for removing iron oxide scale from sheet metal and producing a sheet metal surface with rust inhibitive properties. The sheet metal is advanced through the descaling cell and a slurry mixture is propelled against at least one of the top surface and bottom surface of the sheet metal across the sheet metal width as the material is advanced through the descaling cell. The rate of slurry impact against the at least one of the top surface and bottom surface of the sheet metal is controlled in a manner to remove substantially all of the scale from a surface of the sheet metal, and in a manner to create a passivation layer on the descaled surface of the sheet metal. The passivation layer comprises at least one of silicon, aluminum, manganese and chromium and inhibits oxidation of the descaled surface of the processed sheet metal.

Abstract: An apparatus and method of removing scale from the surfaces of processed sheet metal and tubular metal employs a scale removing medium propelled by counter-rotating pairs of wheels positioned in close proximity to the metal surfaces.

Abstract: A method is provided for removing iron oxide scale from sheet metal and producing a sheet metal surface with rust inhibitive properties. The sheet metal is advanced through the descaling cell and a slurry mixture is propelled against at least one of the top surface and bottom surface of the sheet metal across the sheet metal width as the material is advanced through the descaling cell. The rate of slurry impact against the at least one of the top surface and bottom surface of the sheet metal is controlled in a manner to remove substantially all of the scale from a surface of the sheet metal, and in a manner to create a passivation layer on the descaled surface of the sheet metal. The passivation layer comprises at least one of silicon, aluminum, manganese and chromium and inhibits oxidation of the descaled surface of the processed sheet metal.

Abstract: A method is provided for removing iron oxide scale from sheet metal and producing a sheet metal surface with rust inhibitive properties. The sheet metal is advanced through the descaling cell and a slurry mixture is propelled against at least one of the top surface and bottom surface of the sheet metal across the sheet metal width as the material is advanced through the descaling cell. The rate of slurry impact against the at least one of the top surface and bottom surface of the sheet metal is controlled in a manner to remove substantially all of the scale from a surface of the sheet metal, and in a manner to create a passivation layer on the descaled surface of the sheet metal. The passivation layer comprises at least one of silicon, aluminum, manganese and chromium and inhibits oxidation of the descaled surface of the processed sheet metal.

Abstract: An abrasive throwing wheel assembly comprising a rotating wheel having a forward face including: a recess bounded circumferentially by an interior wall of a forward peripheral portion; a plurality of blade slots in the forward peripheral portion; and a groove, for receiving a retaining element, provided in the recess proximate the rearward base end of the interior wall. To prevent the retaining element groove from interfering with the attachment and removal of the blades, the assembly also includes: (a) the peripheral portion having a rearwardly sloped forward surface, (b) the interior wall diverging rearwardly toward the axis of rotation, and/or (c) the blade slots extending outwardly from the recess at a rearward angle.

Abstract: A vane of a throwing wheel apparatus including a particle throwing portion, extending between first and second ends, having a first throwing face, a second throwing face, and two side edges. Each of the side edges extend substantially parallel to one another and includes a locking member adapted to be detachably coupled to a mounting element of the throwing wheel apparatus. Each locking member includes a first taper in a first plane and a second taper in a second plane. The first plane is substantially perpendicular to each side edge of the vane and the second plane is substantially parallel to the first taper. The side edges define a width smaller than a predetermined distance between first and second mounting elements of the throwing wheel apparatus so that when coupled to the mounting elements a gap is present on both sides of the vane.

Abstract: A centrifugal projecting machine having a house, a driving device disposed at a first side of the housing with a flange, an impeller having a plurality of blades, wherein the impeller is connected to a driving shaft of the driving device with a hub, a distributor disposed in an inner cylindrical space of the impeller so that it is concentrically arranged in relation to the driving shaft, wherein the distributor has slit-like openings that are circumferentially disposed with substantially equal clearances, a control cage having an opening around a distal end for dispersing shot, wherein a proximal end surface of the control cage is connected to the second side of the housing, opposite its first side, around an opening for an intake disposed at its second side, wherein he control cage is disposed with a clearance between inner ends of the blades and an outer surface of the distributor and extends over the length of the impeller, and a nozzle connected to the second side of the housing to supply the opening for

Abstract: An impeller (2) for feeding blasting shots, which are to be accelerated, into the centrifugal wheel of a blasting installation, the impeller (2) being arranged in the central region of the centrifugal wheel inside a distributing sleeve (1) which has a distributing opening (8) and can be rotated in the direction of rotation of the centrifugal wheel, and the impeller (2) having, in particular platelike, guiding elements which are directed toward the distributing sleeve (1), are intended for guiding the blasting shot to the outside and are arranged on at least one lateral disk (4), and in that in each case at least two adjacent guiding means are designed as limbs (5, 6), interconnected, in particular, integrally, of a profiled piece (3), adjacent limbs (5, 6) of adjacent profiled pieces (3) forming channels (7) through which the blasting shot can be discharged to the outside.

Abstract: An apparatus and method of removing scale from the surfaces of processed sheet metal employs a scale removing medium propelled by counter-rotating pairs of wheels positioned in close proximity to the sheet metal surfaces.

Abstract: A throwing wheel assembly including a wheel and a series of throwing blades mounted in radial channels in the wheel formed with mating dovetail wing portions on the slot sides and a projecting at the base of the blade. A sloping grove in the bottom of each channel engages a projecting ramp feature on the base of the mating blade received therein to cam the blade outwardly and thereby create a tight fit of the dovetail portions and to lock the blades in position.

Abstract: A spinner wheel housing (100) comprises an outer housing (10) having at least one covering element (15), at least one bottom element (16), two front wall elements (11, 12) and two trapezoidal lateral wall elements (13, 14) which are arranged at a distance from each other and encompassed by the front wall elements. At least one of the lateral wall elements (13, 14) has a recess for receiving a guiding sleeve. A guiding sleeve cover (40) is pressed against this lateral wall element (14) by means of at least three clamping claw devices (50) which are fixed to the lateral wall element next to the recess for receiving the guiding sleeve and/or a bottom support element (16). The bottom element is connected to a base support element (17) by means of a plurality of clamping claw devices (70). The base bearing element is adapted to be fixed to a blasting compartment or a foundation.

Abstract: A throwing wheel assembly including a wheel and a series of throwing blades mounted in radial channels in the wheel formed with mating dovetail wing portions on the slot sides and a projecting at the base of the blade. A sloping grove in the bottom of each channel engages a projecting ramp feature on the base of the mating blade received therein to cam the blade outwardly and thereby create a tight fit of the dovetail portions and to lock the blades in position.

Abstract: The invention relates to a device for accelerating abrasives, comprising a centrifugal wheel (8) that is driven to rotate about an axis of rotation. Said centrifugal wheel further comprises blades (2) that are disposed in a substantially radial orientation relative to the axis of rotation, and a lateral disk (4) on which the blades (2) are retained with a lateral edge. A feed line (6) for the abrasive has an opening (7) that is contiguous with the free edges of the blades (2) of the centrifugal wheel (8) outside the axis of rotation of said centrifugal wheel (8). The inventive device is further characterized in that the blades (2), on the side facing the feed line (6), have recesses (3) that are opposite the opening (7) of the feed line (6).

Abstract: An impeller (2) for feeding blasting shots, which are to be accelerated, into the centrifugal wheel of a blasting installation, the impeller (2) being arranged in the central region of the centrifugal wheel inside a distributing sleeve (1) which has a distributing opening (8) and can be rotated in the direction of rotation of the centrifugal wheel, and the impeller (2) having, in particular platelike, guiding elements which are directed toward the distributing sleeve (1), are intended for guiding the blasting shot to the outside and are arranged on at least one lateral disk (4), and in that in each case at least two adjacent guiding means are designed as limbs (5, 6), interconnected, in particular, integrally, of a profiled piece (3), adjacent limbs (5, 6) of adjacent profiled pieces (3) forming channels (7) through which the blasting shot can be discharged to the outside.

Abstract: A throwing wheel comprising a mounting element having a central axis with a plurality of blades connected to the mounting element. Each of the blades has an inner end, a first portion of the inner end and a second portion of the inner end. A plurality of locking mechanisms is associated with the respective plurality of blades. Each of the locking mechanisms comprises at least one biasing element which biases the blade away from the central axis of the mounting body and connects each of the blades to the mounting element.

Abstract: A control cage for an abrasive blasting wheel includes a housing forming an interior chamber, a blast media outlet positioned in the housing, and a channel formed in an inner side of the housing. A distribution device for an abrasive blasting wheel includes an impeller having a media inlet at one end adapted to receive blast media and a plurality of impeller media outlets constructed and arranged to allow egress of the blast media upon rotation of the impeller, a control cage surrounding the impeller and having a cage media outlet adapted for passage of the blast media, and a channel formed between the impeller and the control cage. The channel of the distribution device may be formed on an inner side of the control cage, an outer side of the impeller, or both.

Abstract: The invention relates to a device for feeding blasting shots into the central area of a centrifugal wheel (1) in a shot blasting system via a feed pipe (3), whereby a distributing bushing (7) comprising a distributing opening (8) is provided in the central region thereof. An impeller (9) comprising discharge openings (11) rotates in the distributing bushing (7) together with the centrifugal wheel (1), wherein the shots which are to be accelerated enter in an axial direction, the feed pipe (3) for the shots discharges into the impeller (9) and is provided with a ring-shaped tongue (10) which protrudes into the impeller (9) in the region of the distributing opening (8).

Abstract: An improved vane for use with a centrifugal throwing apparatus. The vane has a convex leading surface and flared edges to provide a consistent, broad blast pattern and improved vane wear characteristics. In one embodiment, the vane includes a pickup end, a discharge end opposed to the pickup end, and a leading surface connecting the pickup end to the discharge end. A portion of the leading surface is convex in cross section. Two opposed longitudinal edges define the leading surface, with at least one of the edges being outwardly flared. In an alternative embodiment, the vane includes a longitudinal raised rail formed near one edge of the leading surface, the rail being outwardly flared.

Abstract: The apparatus comprises a storage vessel (19) for abrasive particles, a source of pressurised carrier fluid and a first conduit (11) to convey at least a major proportion of the incoming carrier fluid to a nozzle (16). A second conduit (9) connects the source of carrier fluid to an inlet of the storage vessel (19) and a third conduit (18) connects its outlet to the nozzle (16). A switching device (6) is selectively operable either to allow a minor proportion of incoming carrier fluid to flow through the second conduit (9) to the storage vessel (19), or to direct all of the carrier fluid through the first conduit (11). When a minor proportion of carrier fluid is directed through the second conduit (9), abrasive particles in carrier fluid are discharged from storage vessel (19) into the third conduit (18). When all of the carrier fluid is directed through the first conduit (11), fluid from the second conduit is entrained, thereby reversing fluid flow in the second (9) and third (18) conduits.

Abstract: In a blasting device, the blasting agent is thrown against the wall to be cleaned. The blasting agent and the dirt removed from the wall are collected in the bottom of the blasting unit in a collection chamber and conveyed by a conveyor to a separation chamber. An extraction device fitted on a suction connection creates air circulation in the blasting device, such that air circulation, the dirt and the blasting agent are separated. The air is supplied through an air supply opening which is placed between the inner seal and the outer seal around the blast opening.

Abstract: Abrasive grains are produced by gluing an abrasive powder to an elastic porous carrier. A number of abrasive grains are mixed with an abrasive liquid, and are then sprayed to the surface of a work at an oblique angle thereto to impact it while allowing the abrasive grains to slide on the surface of a work to finish the surface of the work. Over the distance of travel over which the abrasive grains slide, the surface of the work are ground. The elasticity of the carrier allows the abrasive grains to deform matching the contour of the work. By spraying a number of abrasive grains on the work, grinding action is performed in consideration of the contour even if the work is a complicatedly contoured surface such as a dental prosthesis while a polishing effect is obtained at the same time.

Abstract: A blast surface treating machine utilizes a control cage featuring an inlet and an outlet that is positioned with its outlet within the central space of the machine blast wheel. A hopper supplies particulate material to the control cage inlet. A rotating screw conveyor transports the particulate material through the control cage. The screw conveyor also forces the particulate material out of the control cage outlet where it is picked up by the rotating blast wheel. The control cage is oscillated about the axis of the blast wheel to provide a widened blast pattern upon the surface being treated. The blast wheel, blast wheel housing, control cage and screw conveyor are constructed of manganese or hardened steel to provide the an anti-shattering construction in the event that a bolt or other foreign object falls into the hopper.

Abstract: A centrifugal blasting apparatus is configured to deliver friable media without destroying a large percentage of the delivered media. The centrifugal blasting apparatus includes a compressed air feed system that intermixes and fluidizes blast media with compressed air and delivers the fluidized blast media to a blast wheel. The control cage is formed with rounded interior surfaces to avoid sharp transitions that may otherwise fracture the media. The blades are curved to maximize accelleration of the blast media with the lowest possible rotational rate. The first edges of the blades, adjacent the axis of rotation, are configured to receive the blast media. Specifically, the first edges are rounded to minimize the amount of blast media that is broken by using a sharp leading edge. The channels on the blades themselves are also polished to minimize the amount of blast media that is broken while traveling along the surface of the blades.

Abstract: Apparatus for abrasive blasting of the bottom of a ship in a drydock includes a blast head mounted on a vertically swinging boom on a vehicle. The blast head has freedom of movement about two pivot axes which are not parallel to each other. One of the pivot axes is coincident with the longitudinal axis of the boom. The center of gravity of the blast head is below the pivot axes when the blast opening normally faces upwardly. The boom and blast head are raised by double acting hydraulic cylinders which hold the blast head against the ship with a constant force. The blast head has a side edge which extends laterally at least to the side edge of the vehicle to facilitate blasting adjacent to obstacles under the hull. An overhung load adapter connects the blast wheel to its motor to minimize radial loads on the blast wheel motor. In the blast head, a stream of blasting material falling toward a main hopper is subjected to a transverse air stream which laterally deflects lighter particles into a debris channel.

Abstract: In accordance with the teachings of the present invention, an abrasive blast wheel is assembled for cleaning work pieces with abrasive materials. The blast wheel assembly is simplified by securing the blades about the impeller by inserting them into slots in a blade supporting wheel and retaining them therein with a retaining ring that extends over the outer edge of the wheel. Removal and subsequent replacement of the blades is thus simplified because all of the blades may be removed simultaneously by merely removing the retaining ring.

Abstract: The present invention relates to an improved blast cleaning apparatus for cleaning coiled wire with abrasive cleaning material. A prior art apparatus for blast cleaning wires comprises an elongated boom provided with annular splitters for longitudinal separation of wire coils and metal lifters for radial separation of wire coils to expose substantially all of the surface of the wires to the abrasive cleaning material. Due to the hardness of the lifters, some abrasive cleaning material becomes embedded in the wire and causes problems with subsequent processing steps. The present invention provides a blast cleaning apparatus having resilient lifters which overcome this and other difficulties. Preferably, the lifters according to the present invention are made of polyurethane and are used in combination with a conventional boom with or without splitters.

Abstract: A centrifugal abrasive grain projecting device is disclosed. The device includes a cover main body (2) covering an impeller (1), a hollow cylindrical body (6) rotatably mounted on the external surface of a side wall of the cover main body, a control cage (7) passing through the cylindrical body so as to be inserted into the impeller and at one end detachably affixed to the hollow cylindrical body, an introducing tube (9) that is adapted to abut, at a distal end, one end of the control cage via an elastic member (8) and that is detachably held between the control cage and a holding mechanism (10), and a rotational drive mechanism (17) for reversibly rotating the hollow cylindrical body, wherein the device prevents abrasive grains from entering a portion where the hollow cylindrical body fits in the cover main body and from stopping the rotation of the hollow cylindrical body.

Abstract: The present invention relates to an improved lifter for a blast cleaning apparatus for cleaning coiled wire with abrasive cleaning material. A prior art apparatus for blast cleaning wires comprises an elongated boom provided with annular splitters for longitudinal separation of wire coils and metal lifters for radial separation of wire coils to expose substantially all of the surface of the wires to the abrasive cleaning material. Due to the hardness of the lifters, some abrasive cleaning material becomes embedded in the wire and causes problems with subsequent processing steps. The present invention provides a resilient lifter for a blast cleaning apparatus which overcome this and other difficulties. Preferably, the lifters according to the present invention are made of polyurethane and are used in combination with a conventional boom with or without splitters.

Abstract: An adjustable cage assembly for selectively varying the path of abrasive in an abrasive blast swath produced by a mobile surface abrading apparatus. The adjustable cage assembly operates in cooperation with a rotable wheel having multiple, radially-extending blades positioned in a wheel housing. A cage having a cage window extends into the center of the wheel and an impeller having multiple impeller slots is positioned in the cage for rotation with the wheel, and receives a supply of abrasive particles such as steel shot, from the apparatus. As the impeller and wheel are rotated and the abrasive is continually fed into the impeller, the abrasive is discharged through the rotatably aligned impeller slots and the selectively-positioned cage window, and is propelled by the rotating wheel blades through the abrasive discharge opening to abrade, clean or etch the pavement.