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US20090286456A1 - Control-cage, a centrifugal shot-blasting device, and a centrifugal shot-blasting device for throwing abrasive grains - Google Patents

Control-cage, a centrifugal shot-blasting device, and a centrifugal shot-blasting device for throwing abrasive grains Download PDF

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Publication number
US20090286456A1
US20090286456A1 US12/097,088 US9708806A US2009286456A1 US 20090286456 A1 US20090286456 A1 US 20090286456A1 US 9708806 A US9708806 A US 9708806A US 2009286456 A1 US2009286456 A1 US 2009286456A1
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United States
Prior art keywords
cage
control
wall
axis
impeller
Prior art date
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Abandoned
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US12/097,088
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English (en)
Inventor
Masakatsu Ito
Kyoichi Iwata
Hiroaki Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sintokogio Ltd
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Sintokogio Ltd
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Filing date
Publication date
Application filed by Sintokogio Ltd filed Critical Sintokogio Ltd
Assigned to SINTOKOGIO, LTD. reassignment SINTOKOGIO, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ITO, MASAKATSU, IWATA, KYOICHI, SUZUKI, HIROAKI
Publication of US20090286456A1 publication Critical patent/US20090286456A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/06—Impeller wheels; Rotor blades therefor
    • B24C5/068—Transferring the abrasive particles from the feeding means onto the propeller blades, e.g. using central impellers

Definitions

  • the present invention relates to a control-cage, and a centrifugal shot-blasting device and a centrifugal shot-blasting device for throwing abrasive grains, using this control-cage. More particularly, it relates to a control-cage that rotates an impeller having a plurality of blades at high speed, and throws shot-blasting media that are discharged through the opening of the control-cage at an object to be processed, as well relating to a centrifugal shot-blasting device and the device for throwing abrasive grains using this control-cage.
  • the control-cage can concentrate the distribution of shot-blasting media.
  • a shot blasting is carried out so as to flake and remove the rust, burrs, scales, paint, etc., on the surface of an object to be processed by throwing shot-blasting media against it.
  • a centrifugal shot-blasting device is used. It rotates an impeller having a plurality of blades at high speed, and causes them to throw the media centrifugally.
  • the shot-blasting media that through an inlet tube are stirred by a rotating distributor, and discharged through an opening of a cylindrical control-cage, and then thrown out from the outer edge of the blades against the object to be processed.
  • the opening is made on the cylindrical part of the control-cage in the shape of a triangle or a quadrangle, so as to control the angle of emission or the angle of spray, as disclosed in the Publication of Examined Japanese Patent Application No. S50-32142 and Japanese Patent Laid-open No. H09-174437, for example.
  • the shape of the triangle or the quadrangle is like the Japanese character for “ha,” but upside down (the shape of the letter V).
  • the shot-blasting media are usually concentrically thrown against an object, if, for example, the object to be processed is small, not all the media will be effectively used, because some of them will be thrown at spaces other than the object. Therefore, some media will be useless. Also, the shot-blasting media that are thrown against spaces other than the object cause the liner inside a housing (case) to be badly worn. Therefore, too much material for a liner is needed (for example, to make it thicker, or to use abrasion-resistant steel, which is expensive, instead of rolled steels for general structure, which is usually used, as the material of the liner). Accordingly, it has a problem in that it requires more money. Further, it has problems in that the frequency of maintenance, such as exchanging parts, is increased and the cost for the exchanges is increased, because the wear of the liner is greater.
  • an exit for the discharge of abrasive grains is made on the body of the control-cage.
  • the lateral wall of the exit is located upstream of the direction of the rotation of the distributor.
  • the lateral wall of the exit is located downstream. Both are located on planes that extend from the shaft axis of the control-cage. Thus, usually the exit is made so as to widen toward the end.
  • the area at which abrasive grains are thrown in a fan-like form is widened more than necessary, when using the conventional centrifugal shot-blasting device for throwing abrasive grains and using this structure of an exit for discharging the grains. Accordingly, they are not effectively thrown against the object to be processed. Therefore, depending on the kind of object, many abrasive grains do not hit it, and the efficiency of throwing abrasive grains is decreased.
  • the object of the present invention is to provide a control-cage that can concentrate the distribution of shot-blasting media and a centrifugal shot-blasting device that uses this control-cage.
  • the object is to provide a centrifugal shot-blasting device for throwing abrasive grains that can narrow the area at which the grains are thrown in a fan-like form.
  • the feature of the invention of claim 1 is a control-cage used for a centrifugal shot-blasting device that rotates an impeller having a plurality of blades at high speed, and throws shot-blasting media against the object to be processed through the opening of the control-cage by the blades.
  • the control-cage is cylindrically shaped. It is placed in the internal space of the impeller.
  • the opening of the control-cage is made by cutting out the cylindrical part of it in parallel with its central axis. Also, the opening has a quadrangular shape, and has a lateral wall located upstream of, and a lateral wall located downstream of, the direction of the rotation of the impeller.
  • the upstream wall is made so that the angle between a plane containing the axis and the plane containing both the axis and the inner edge of the upstream wall is larger than the angle between the plane containing the axis and the plane containing both the axis and the outer edge of the upstream wall when they are measured in the direction opposite that of the rotation of the impeller.
  • the upstream wall is basically directed to the object to be processed. So the flow of the shot-blasting media discharged through the opening of the control-cage can be directed to the object. Accordingly, it can concentrate the distribution of the shot-blasting media thrown to a given object to be processed. Therefore, it can treat a small object without wasting shot-blasting media, and can reduce the frequency of the maintenance of the inner liner and can reduce the cost of the parts. Further, since the density of the media at the place to shot-blast is increased, the processing time can be shortened.
  • the upstream wall and the downstream wall should be parallel to each other.
  • the upstream wall is made so that it would correspond to the tangential line of the inner periphery of the control-cage if the control-cage were to be cut radially.
  • the downstream wall is made so that the angle between the plane containing the axis and the plane containing both the axis and the inner edge of the downstream wall is larger than the angle between the plane containing the axis and the plane containing both the axis and the outer edge of the downstream wall when they are measured in the direction opposite to the direction of the rotation of the impeller.
  • the downstream wall is made so that the angle between the plane containing the axis and the plane containing both the axis and the inner edge of the downstream wall is larger than the angle between the plane containing the axis and the plane containing both the axis and the outer edge of the downstream wall when they are measured in the direction opposite to the direction of the rotation of the impeller.
  • the difference between the angles should be 0-35 degrees, in which one angle is between the plane containing the axis and the plane containing both the axis and the outer edge of the upstream wall and the other is between the plane containing the axis and the plane containing both the axis and the inner edge of the downstream wall.
  • the centrifugal shot-blasting device of the present invention is characterized by comprising a housing, a driving means, an impeller, a distributor, the control-cage of claim 1 , and an inlet tube.
  • the driving means is installed outside of a lateral side of the housing.
  • the impeller has a plurality of blades and is fitted onto the driving shaft of the driving means.
  • the distributor is placed inside the impeller. It is concentrically fitted onto the driving shaft. Also, it has openings in its circumference almost equally spaced from each other.
  • the end of the control-cage is fitted on an inlet that is provided at a lateral side of the housing.
  • the inlet tube is fixed on the housing so as to cause shot-blasting media to be supplied to the inlet.
  • the plane that includes the central axis in the present invention represents one that includes the axis and that does not intersect with an opening that is surrounded by an upstream wall and a downstream wall.
  • the feature of the invention of claim 8 is a centrifugal shot-blasting device for throwing abrasive grains that comprises an impeller, a control-cage, and a distributor.
  • the impeller can rotate. It has a space in its middle that is cylindrical.
  • the control-cage is nearly cylindrical. It is fixed inside that space. Further, it has an exit for abrasive grains on its cylindrical part, to discharge the grains.
  • the distributor is located inside the control-cage, so that it can be rotated together with the impeller.
  • the exit for abrasive grains on the control-cage is approximately an elongated slit that has a given width. It is parallel to the central axis of the control-cage.
  • upstream wall which is located upstream of the direction of rotation of the distributor
  • downstream wall which is located downstream of the direction of rotation of it.
  • the upstream wall is inclined in the direction of the rotation of the distributor at 30-90 degrees to a line that is orthogonal to the central axis and that crosses the inner edge of the upstream wall.
  • the abrasive grains that are agitated and driven by the distributor are supplied to the exit for them. Then the abrasive grains are prevented from directly passing through the exit in the radial direction of the control-cage by the surface of the inner wall (upstream wall) of the exit. This wall is located behind the direction of the rotation of the distributor (upstream of the direction of the rotation). The grains are discharged onto the blades of the impeller. As a result of this, since the abrasive grains are so discharged, and are restrained from flying apart through the exit for the abrasive grains, the area at which the grains are thrown by the impeller in a fan-like form can be narrower than that of the conventional area.
  • the feature of the invention of claim 9 is a centrifugal shot-blasting device for throwing abrasive grains that comprises an impeller, a control-cage, and a distributor.
  • the impeller can rotate and has a space shaped as a cylinder in its middle.
  • the control-cage is nearly cylindrical in shape and fixed inside the space. Further, it has an exit for abrasive grains on its cylindrical part, to discharge them.
  • the distributor is located inside the control-cage so that it can be rotated together with the impeller.
  • the exit for the abrasive grains on the control-cage is approximately an elongated slit that has a given width. It is parallel to the central axis of the control-cage.
  • the upstream wall which is located upstream of the direction of the rotation of the distributor, and a downstream wall, which is located downstream of the direction of the rotation of it.
  • the upstream wall runs along the almost tangential line of the inner periphery of the control-cage.
  • the abrasive grains that are agitated and driven by the distributor are smoothly pushed into the exit for the abrasive grains guided by the surface of the inner wall (upstream wall) of the exit, which wall runs along the almost tangential line of the inner periphery of the control-cage. Accordingly, the grains that are pushed into the exit converge there. Thus they are moved through the exit and onto the blades of the impeller in a high density. As a result, the area at which the grains are thrown by the impeller in a fan-like form can be narrower than that of a conventional area.
  • the upstream wall is inclined to the direction of the rotation of the distribution at 30-90 degrees to the line that is orthogonal to the central axis and that crosses the inner edge of the upstream wall. If the incline is less than 30 degrees, the abrasive grains are not sufficiently prevented from directly passing through the exit in the radial direction of the control-cage.
  • the downstream wall is inclined to the direction of the rotation of the distribution at 30-90 degrees to the line that is orthogonal to the central axis and that crosses the inner edge of the downstream wall. If the incline is less than 30 degrees, the abrasive grains will be diffused, because they will hit the wall when they pass through the exit.
  • downstream wall By making the downstream wall approximately in parallel with the upstream wall, the direction the abrasive grains run can be restricted and the area at which the grains are thrown can be narrow.
  • the given width of the exit for the abrasive grains is determined so that the angle between the line that is orthogonal to the central axis and that crosses the outer edge of the upstream wall and the line that is orthogonal to the central axis and that crosses the inner edge of the downstream wall is 0-35 degrees. If the angle is less than 0 degrees, the inner wall in the front side (downstream side) and the inner wall in the rear side (upstream wall) of the exit will impede the abrasive grains from passing through the exit. Accordingly, the grains will accumulate at the exit, and block it, or the maximum quantity of the thrown grains will decrease. If the angle is more than 35 degrees, the area of the opening of the exit will become wide, and the abrasive grains that pass through the exit will be so widely diffused that the area where the grains are thrown will be widened.
  • the elongated slit of the exit for the abrasive grains includes a quadrangular opening.
  • the distributor 5 is positioned coaxially with the driving shaft 3 a .
  • the control-cage 6 is fixed on the opposite lateral side 2 b of the side 2 a of the housing 2 .
  • the inlet tube is fixed on the side 2 b of the housing 2 .
  • the driving means 3 may be a driving motor that has a bearing (not shown).
  • the bearing rotatably supports the driving shaft 3 a .
  • the driving means 3 may also comprise the bearing unit, a pulley that is connected to the end of the shaft 3 a , a driving motor, a pulley that is connected to the driving motor, and a belt that is wound on both pulleys.
  • the impeller 4 is fixed on the driving shaft 3 a by bolts 11 via a hub 10 . It comprises a lateral plate 12 a that is on the side of the driving shaft 3 a of the driving means 3 , a lateral plate 12 b that is placed apart from the lateral plate 12 a at a given distance, and a plurality of blades 13 , e.g., 4-12 blades, that are radially fixed between the lateral plates 12 a and 12 b .
  • the lateral plate 12 b has an opening at its center that is larger than the circumference of the control-cage 6 .
  • the plate 12 b and the blades 13 are arranged so that the inner end of the plate 12 b is located at the same location as are the inner ends of the blades 13 .
  • the lateral plate 12 a of the impeller 4 and the hub of this embodiment are made as separate items. However, the present invention is not restricted to this, but the plate 12 a and the hub 10 may be made as one item.
  • the distributor 5 is a part that agitates the shot-blasting media and that is fixed on the lateral plate 12 a by bolts 14 . It has more or less or the same number of openings (notches) 15 as do the blades 13 , which blades 13 are arranged with almost equal intervals in the circumferential direction.
  • the distributor 5 of this embodiment has comb-like projections, i.e., the same number of nails 16 protrude from a base 5 a in parallel with the central axis of the impeller 4 .
  • the present invention is not restricted to this. Namely, the ends of the nails 16 may be connected to each other so as to be reinforced.
  • the control-cage 6 is a part that controls the direction of the shot-blasting media by an opening 17 that is made on the cylindrical part in a direction that is parallel to the central axis C (i.e., horizontally in FIG. 1 , or perpendicular to the sheet of FIG. 2 ).
  • the control-cage 6 is located between the distributor 5 and the blade 13 . Its back end 6 b is fixed on the circumference of an inlet 18 of the media.
  • the inlet 18 is made at the lateral side 2 b , which is opposite the lateral side 2 a of the housing 2 .
  • a flange (ring) 19 for linking is set on the inlet 18 and fixed to the lateral side 2 b by bolts 20 . Then the protruding part 6 c , formed on the back end 6 b of the control-cage 6 , which part is inserted along the inner periphery of the flange 19 , is held between the end-face of the flange 19 and the end-face of the inlet tube 7 . Finally, they are pushed by the member 21 for clamping the inlet tube, and fixed by bolts 22 .
  • the angle ⁇ 2 a which is the angle that is measured from the plane C 1 containing the central axis C to the inner edge 32 a of the downstream wall 32
  • the angle ⁇ 2 b which is the angle that is measured from the plane C 1 , containing the central axis C, to the outer edge 32 b of the downstream wall 32 .
  • the downstream wall 32 is inclined to the direction A more than is the line connecting the inner edge 32 a of the downstream wall 32 to the central axis C.
  • the relationship between the angles at the upstream wall 31 and that between those at the downstream wall 32 can be accordingly chosen by considering, for example, the mean diameter of the grains, the area of the grains thrown at an object to be processed, the quantity of the thrown grains, the velocity of the grains, etc.
  • the upstream wall 31 is basically aimed at an object to be processed.
  • the downstream wall 32 hardly prevents the flow of shot-blasting media. Therefore, the shot-blasting media that pass through the opening of the control-cage can be guided, so that the flow of them can be basically aimed at the object to be processed.
  • the angle ⁇ 2 a which is the angle that is measured from the plane C 1 containing the central axis C to the inner edge 32 a of the downstream wall 32
  • the angle ⁇ 2 b which is the angle that is measured from the plane C 1 containing the central axis C to the outer edge 32 b of the downstream wall 32 .
  • the downstream wall 32 hardly prevents the flow of shot-blasting media.
  • an opening 47 has the downstream wall 42 , which is parallel to the plane C 1 , as in FIG. 3 , and the upstream wall 41 , which is made by drawing a tangent line L on the inner circle (inner periphery) 46 a , which line L is parallel to the plane C 1 , causing the contact point of the line L to be an inner edge 42 a , and causing an upstream wall 41 to be on the tangent line L.
  • the angle ⁇ 1 b is the angle that is measured from the plane C 1 , containing the central axis C, to the outer edge 41 b of the upstream wall 41 .
  • the angle ⁇ 2 a is the angle that is measured from the plane C 1 , containing the central axis C, to the inner edge 42 a of the downstream wall 42 . If the difference ⁇ is less than 0, the opening will be so small that it can be clogged, and so the maximum quantity of the thrown media will be decreased. Also, if the difference ⁇ is more than 35 degrees, the opening will be so wide that the area against which they are thrown (the distribution of them) can be widened.
  • the inlet tube 7 through which shot-blasting media are supplied to the impeller 4 , is fixed on the lateral side 2 b of the housing 2 so that the media can be conducted to the inlet 18 .
  • the shot-blasting media are supplied from the inlet tube 7 , pass through the control-cage 6 , and are agitated by the rotation of the distributor 5 .
  • the media that have been agitated in the control-cage 6 are exhausted through its opening 17 and supplied to the inner edges of the rotating blades 13 .
  • the shot-blasting media are gradually accelerated by the rotating blades 13 , are projected from the outer edges, and remove the rust, burrs, scales, paint, etc., on the surface of an object to be processed.
  • the angle ⁇ 1 a for the opening 17 is larger than the angle ⁇ 1 b .
  • a centrifugal shot-blasting device using a control-cage was used.
  • the angle ⁇ 1 b is measured from the plane C 1 , containing the central axis C, to the outer edge 41 b of the upstream wall 41 .
  • the angle ⁇ 2 a is measured from the plane C 1 , containing the central axis C, to the inner edge 42 a of the downstream wall 42 .
  • a half-value breadth of the distribution is defined as the area between the angles at which the rate of the thrown media is 50% of the peak value.
  • the half-value breadth of the distribution of comparative example 1 is 49.9 degrees. That of comparative example 2 is 86.6 degrees. In contrast, that of the example is 34.4 degrees. Therefore, the degree of the distribution of the example was 31% less than that of comparative example 1, or 60% less than that of comparative example 2.
  • the device comprises an impeller 53 , a control-cage 55 , and a distributor 56 , as in FIG. 8 .
  • the impeller 53 is rotatably installed in the device, has a plurality of blades in a radial pattern, and has a cylindrical space 52 in its center.
  • the control-cage 55 is placed in the cylindrical space 52 , has a shape of a hollow cylinder, and has an opening 54 for an exit of the abrasive grains, on its lateral side.
  • the distributor 56 is installed in the hollow space of the cage 55 so that it can rotate with the impeller 53 .
  • the exit of the abrasive grains 54 on the control-cage 55 is approximately an elongated slit that has a given width and that is parallel to the central axis 59 of the control-cage 55 , as in FIG. 7 .
  • it has an inner wall (upstream wall) 58 , which is located opposite (upstream of) the direction of the rotation of the distributor 56 (the direction of an arrow 57 ).
  • the upstream wall 58 is inclined to the direction of the arrow 57 at 70 degrees to the line 60 , which is orthogonal to the central axis 59 of the control-cage 55 and that crosses the inner edge of the upstream wall 58 .
  • the inner wall 61 of the exit of the abrasive grains 54 which wall is located forward of the direction of the arrow 57 , is approximately parallel to the inner wall (upstream wall) 58 .
  • the abrasive grains that are agitated and driven by the distributor are supplied to the exit 54 for the abrasive grains.
  • the abrasive grains are prevented from directly passing through the exit 54 in the radial direction of the control-cage 55 by the surface of the inner wall (upstream wall) 58 of the exit 54 .
  • they pass through the exit 54 onto the blades 51 of the impeller 53 .
  • they are discharged onto the blades 51 of the impeller 53 , while being restrained from flying apart through the exit 54 for the abrasive grains. Accordingly, the area at which the grains are thrown by the impeller 53 in a fan-like form can be narrower than that resulting from a conventional impeller.
  • the inner wall (upstream wall) 78 of the exit 74 of the abrasive grains is approximately parallel to the inner wall (downstream wall) 81 of the exit 74 .
  • the downstream wall 81 is located forward of the direction of the arrow 57 .
  • the given width of the exit 74 is determined such that the angle made by lines 91 and 92 is 0-35 degrees.
  • the line 91 connects the central axis O of the control-cage 75 and the outer edge (the border at the outside) A of the inner wall (upstream wall) 78 of the exit 74 of the abrasive grains.
  • the line 92 connects the central axis O and the inner edge (the border at the inside) B of the inner wall (downstream wall) 81 of the exit 74 .
  • FIG. 10 compares of the area at which abrasive grains are thrown in a fan-like form using the exit 54 or 74 for the abrasive grains of the control-cage 55 or 75 of the present invention to an area that uses another type of exit for the abrasive grains of the control-cage.
  • FIG. 10 shows that the area at which abrasive grains are thrown in a fan-like form using the exit 54 or 74 for the abrasive grains of the control-cage 55 or 75 of the present invention is narrower than that of another type of exit for the abrasive grains of a control-cage.
  • FIG. 1 is a partial cross-sectional view of the centrifugal shot-blasting device using the control-cage of an embodiment of the present invention.
  • FIG. 2 is a radial cross-sectional view of the control-cage of FIG. 1 .
  • FIG. 3 is a radial cross-sectional view of another control-cage.
  • FIG. 5 is a radial cross-sectional view of a conventional control-cage.
  • FIG. 7 is a front view of FIG. 6 .
  • FIG. 8 is a partial cross-sectional view of the centrifugal shot-blasting device using the invention of claim 8 or 9 .
  • FIG. 9 is a schematic cross-sectional view of an embodiment of the control-cage of the invention of claim 9 .
  • FIG. 10 is a graph that compares the areas at which abrasive grains are thrown in a fan-like form using the exit for the abrasive grains of the control-cage of the present invention to that using another exit for the abrasive grains of the control-cage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Centrifugal Separators (AREA)
US12/097,088 2005-12-20 2006-12-19 Control-cage, a centrifugal shot-blasting device, and a centrifugal shot-blasting device for throwing abrasive grains Abandoned US20090286456A1 (en)

Applications Claiming Priority (5)

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JP2005365646 2005-12-20
JP2005-365658 2005-12-20
JP2005365658 2005-12-20
JP2005-365646 2005-12-20
PCT/JP2006/325238 WO2007072803A1 (ja) 2005-12-20 2006-12-19 コントロールケージ、遠心投射装置、及び砥粒遠心投射装置

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JP (1) JP4321655B2 (ja)
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US10155299B1 (en) 2017-08-23 2018-12-18 Wheelabrator Group, Inc. Impeller for a blast wheel machine

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US2108211A (en) * 1934-05-17 1938-02-15 Pangborn Corp Abrading machine
US2352588A (en) * 1941-03-07 1944-06-27 Pangborn Corp Directional control centrifugal blasting machine
US3785105A (en) * 1972-04-05 1974-01-15 Wheelabrator Frye Inc Centrifugal blasting wheel
US4333278A (en) * 1979-09-24 1982-06-08 Wheelabrator-Frye Inc. Bladed centrifugal blasting wheel
US4395851A (en) * 1981-02-03 1983-08-02 Watts W David Centrifugal abrasive blasting machine
US4751798A (en) * 1986-06-04 1988-06-21 Mcdade Bernard F Shot blasting apparatus
US5024028A (en) * 1987-01-16 1991-06-18 Midwest Blast Products, Inc. Airless blast cleaning wheel and housing
US5688162A (en) * 1993-05-27 1997-11-18 Williams; Norman Lewis Blast wheels and cages for blast wheels
US6949014B2 (en) * 2003-11-17 2005-09-27 Wheelabrator Group, Inc. Control cage for abrasive blast wheel
US20090137193A1 (en) * 2005-09-06 2009-05-28 Sintokogio, Ltd. Centrifugally Projecting Machine

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JPS5045580Y2 (ja) * 1972-06-10 1975-12-23
JPH066266B2 (ja) * 1985-05-10 1994-01-26 三菱重工業株式会社 研掃材投射領域制御方法
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US2108211A (en) * 1934-05-17 1938-02-15 Pangborn Corp Abrading machine
US2108006A (en) * 1935-07-25 1938-02-08 Pangborn Corp Abrading apparatus
US2352588A (en) * 1941-03-07 1944-06-27 Pangborn Corp Directional control centrifugal blasting machine
US3785105A (en) * 1972-04-05 1974-01-15 Wheelabrator Frye Inc Centrifugal blasting wheel
US4333278A (en) * 1979-09-24 1982-06-08 Wheelabrator-Frye Inc. Bladed centrifugal blasting wheel
US4395851A (en) * 1981-02-03 1983-08-02 Watts W David Centrifugal abrasive blasting machine
US4751798A (en) * 1986-06-04 1988-06-21 Mcdade Bernard F Shot blasting apparatus
US5024028A (en) * 1987-01-16 1991-06-18 Midwest Blast Products, Inc. Airless blast cleaning wheel and housing
US5688162A (en) * 1993-05-27 1997-11-18 Williams; Norman Lewis Blast wheels and cages for blast wheels
US6949014B2 (en) * 2003-11-17 2005-09-27 Wheelabrator Group, Inc. Control cage for abrasive blast wheel
US20090137193A1 (en) * 2005-09-06 2009-05-28 Sintokogio, Ltd. Centrifugally Projecting Machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10155299B1 (en) 2017-08-23 2018-12-18 Wheelabrator Group, Inc. Impeller for a blast wheel machine
WO2019040208A1 (en) * 2017-08-23 2019-02-28 Wheelabrator Group, Inc. AUBES WHEEL FOR A STRIPPER WHEEL MACHINE

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JP4321655B2 (ja) 2009-08-26
JPWO2007072803A1 (ja) 2009-05-28

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