Impact crusher

Claim 2

In a centrifugal rock crusher including a cylindrical housing with a vertically disposed central axis, a plurality of rock crushing anvil means positioned radially around the interior of said housing in a band transverse to said central axis, and impeller means disposed for rotation concentrically within said housing and adapted to throw rock to be crushed against said anvil means, the improvement comprising: each of said anvil means has at least two anvil members with substantially vertical mating surfaces rigidly secured together, each said anvil means being secured in said housing so that said vertical mating surfaces are disposed in a radial plane of said housing.

Claim 3

A centrifugal rock crusher as defined in claim 1 wherein each said anvil member has a soft core portion and relatively harder surface portions including said mating surfaces and front surfaces upon which rock is crushed.

Claim 4

A centrifugal rock crusher as defined in claim 1 wherein said plurality of anvil means are disposed in two concentric rows with adjacent anvil means in alternate rows, each said anvil means being radially adjustably movable so as to vary the distance from said impeller means to said anvil means.

Claim 5

A centrifugal rock crusher as defined in claim 1 wherein said impeller means comprises a plurality of vane members which are generally equalaterally triangular in horizontal cross section with the bisector of the apex of the equal sides thereof lying in a radial plane, said apex being radiused sufficiently to substantially reduce wear thereof.

Claim 6

A centrifugal rock crusher, comprising: a cylindrical housing with a vertically disposed central axis; a plurality of rock crushing anvil means removably secured around the interior of said housing in a band transverse to said central axis and each having at least two anvil members with substantially vertical mating surfaces rigidly secured together, each said anvil means being secured in said housing so that said vertical mating surfaces are disposed in a radial plane of said housing; an impeller means disposed for rotation concentrically within said housing and having upper and lower vertically spaced disc-shaped members in substantial aligment with said band of anvil means, said upper disc-shaped member having a central opening defined therethrough through which rock to be crushed can pass; a plurality of substantially equally radially spaced vane members secured between said disc-shaped members about the periphery thereof for rotation therewith, substantially vertical surfaces of adjacent vane members defining channels therebetween through which rocks to be crushed can pass and be directed against said anvil means; a plurality of upper and lower wear plates disposed between all adjacent said vane members and respectively secured to said upper and lower disc-shaped members for rotation therewith and having outer surfaces respectively defining upper and lower boundries of said channels, said outer surfaces being inclined outwardly from said central axis and downwardly at an acute angle from a horizontal plane; landing cone means disposed concentrically between said upper and lower disc-shaped members for rotation therewith and for receiving rock to be crushed and distributing it to said channels, said landing cone means including an upper surface portion having a right frusto-conical shape with an upwardly directed apex and with the side surfaces thereof making an angle with a horizontal plane in the range of about 5° to 10°; and motor means drivingly engaging said impeller means.

Claim 7

A centrifugal rock crusher, comprising: a cylindrical housing with a vertically disposed central axis; a plurality of rock crushing anvil means removably secured around the interior of said housing in a band transverse to said central axis and each having at least two anvil members with substantially vertical mating surfaces rigidly secured together, each said anvil means being secured in said housing so that said vertical mating surfaces are disposed in a radial plane of said housing; an impeller means disposed for rotation concentrically within said housing and having upper and lower vertically spaced disc-shaped members in substantial aligment with said band of anvil means, said upper disc-shaped member having a central opening defined therethrough through which rock to be crushed can pass; a plurality of substantially equally radially spaced vane members secured between said disc-shaped members about the periphery thereof for rotation therewith, substantially vertical surfaces of adjacent vane members defining channels therebetween through which rocks to be crushed can pass and be directed against said anvil means; a plurality of upper and lower wear plates disposed between all adjacent said vane members and respectively secured to said upper and lower disc-shaped members for rotation therewith and having outer surfaces respectively defining upper and lower boundries of said channels, said outer surfaces being inclined outwardly from said central axis and downwardly at an acute angle from a horizontal plane; landing cone means disposed concentrically between said upper and lower disc-shaped members for rotation therewith and for receiving rock to be crushed and distributing it to said channels, said landing cone means including an upper surface portion having a right frusto-conical shape with an upwardly directed apex and with the side surfaces thereof making an angle with a horizontal plane in the range of about 5° to 10°; and motor means drivingly engaging said impeller means.

Claim 8

A centrifugal rock crusher, comprising: a cylindrical housing with a vertically disposed central axis; a plurality of rock crushing anvil means positioned radially around the interior of said housing in a band transverse to said central axis; an impeller means disposed for rotation concentrically within said housing and having upper and lower vertically spaced disc-shaped members in substantial alignment with said band of anvil means, said upper disc-shaped member having a central opening defined therethrough through which rock to be crushed can pass; a plurality of substantially equally radially spaced vane members secured between said disc-shaped members about the periphery thereof for rotation therewith, substantially vertical surfaces of adjacent vane members defining channels therebetween through which rocks to be crushed can pass and be directed against said anvil means; a plurality of upper and lower wear plates disposed between all adjacent said vane members and respectively secured to said upper and lower disc-shaped members for rotation therewith and defining upper and lower boundaries of said channels; landing cone means disposed concentrically between said upper and lower disc-shaped members for rotation therewith and for recieving rock to be crushed and distributing it to said channels, the apex of a conical surface porition of said cone being directed upwardly; motor means drivingly engaging said impeller means; and outer surfaces of said upper wear plates defining upper boundaries of said channels and being inclined downwardly and outwardly from said central axis at an actue angle to a horizontal to facilitate directing the trajectory of rocks thrown from said impeller generally horizontally against said anvils.

Claim 9

A centrifugal rock crusher, comprising: a cylindrical housing with a vertically disposed central axis; a plurality of rock crushing anvil means positioned radially around the interior of said housing in a band transverse to said central axis; an impeller means disposed for rotation concentrically within said housing and having upper and lower vertically spaced disc-shaped members in substantial alignment with said band of anvil means, said upper disc-shaped member having a central opening defined therethrough through which rock to be crushed can pass; a plurality of substantially equally radially spaced vane members secured between said disc-shaped members about the periphery thereof for rotation therewith, substantially vertical surfaces of adjacent vane members defining channels therebetween through which rocks to be crushed can pass and be directed against said anvil means; a plurality of upper and lower wear plates disposed between all adjacent said vane members and respectively secured to said upper and lower disc-shaped members for rotation therewith and defining upper and lower boundaries of said channels; landing cone means disposed concentrically between said upper and lower disc-shaped members for rotation therewith and for recieving rock to be crushed and distributing it to said channels, the apex of a conical surface porition of said cone being directed upwardly; motor means drivingly engaging said impeller means; and outer surfaces of said upper wear plates defining upper boundaries of said channels and being inclined downwardly and outwardly from said central axis at an actue angle to a horizontal to facilitate directing the trajectory of rocks thrown from said impeller generally horizontally against said anvils.

Claim 10

A centrifugal rock crusher as defined in claim 6 wherein said angle of said outer surface is approximately 2°.

Claim 11

A centrifugal rock crusher as defined in claim 7 wherein said lower wear plates have at least a substantial portion of their outer surfaces which define a lower portion of said channels inclined outwardly from said central axis and downwardly at an acute angle from a horizontal plane.

Claim 12

A centrifugal rock crusher as defined in claim 8 wherein said angle of said at least a portion of said outer surfaces of said lower wear plates is approximately 2°.

Claim 13

A centrifugal rock crusher as defined in claim 9 wherein another portion of said outer surface of said lower wear plates innermost towards said central axis is inclined outwardly and downwardly at an acute angle greater than said angle of said at least a portion of said outer surface.

Claim 14

A centrifugal rock crusher as defined in claim 10 wherein said angle of said another portion of said outer surface is in the range of 5° to 10°.

Claim 15

A centrifugal rock crusher as defined in claim 9 wherein said angle of said another portion of said outer surface is 8° 20 mins.

Claim 16

A centrifugal rock crusher as defined in claim 9 wherein said angle of said another portion of said outer surface is the same as the angle of said conical surface portion of said landing cone means.