Crushing plant

Claim 2

An elongated crushing plant having crushing means located at front and rear stations, rear conveyor means extending upwardly and forwardly from the underside of the crushing means at said rear station, and a delivery conveyor extending forwardly and upwardly from the underside of the crushing means at said front station, cHaracterized by: A. the crushing means at the rear station comprising primary and secondary crushers; B. a material receiving and classifying unit located between said stations and having means thereon for producing a plurality of outputs each consisting of graded material differing in size from the others; C. said rear conveyor means conducting crushed material from said rear crushing station to said material receiving and classifying unit and comprising first and second conveyors having rear portions disposed to receive crushed materials issuing from said primary and secondary crushers, respectively; D. means for conducting output material of finish grade from said material receiving and classifying unit to said delivery conveyor; E. means comprising a conveyor member for conducting output material of a grade larger than finish grade from the receiving and classifying unit to the crushing means at said front station; F. an elevator to receive materials at a low level inlet and to discharge the same onto said conveyor member from a high level zone; G. means for directing output material of a grade intermediate said larger and finish grades to said low level inlet of the elevator; H. and means for screening out larger than finish grade material discharging from the crushing means at said front station and for conducting the same into the low level inlet of the elevator.

Claim 3

The crushing plant of claim 1, further characterized by: A. said crushing means at the front station comprising primary and secondary crushers; B. the secondary crusher being fed from said conveyor member; C. and a second conveyor member positioned to receive output material of the largest grade from said material receiving and classifying unit and to direct the same into the primary crusher at said front station.

Claim 4

and the lower one of said screen members having smaller mesh and being adapted to vibrationally advance carryover materials thereon to a discharge point at its forward end; D. means for conducting into the primary and secondary crushers scalped materials discharging from said upper and lower screen members, respectively; E. and means for conducting materials that pass through both screen members onto said second conveyor.

Claim 5

and the lower one of said screen members having smaller mesh and being adapted to vibrationally advance carryover materials thereon to a discharge point at its forward end; D. means for conducting into the primary and secondary crushers scalped materials discharging from said upper and lower screen members, respectively; E. and means for conducting materials that pass through both screen members onto said second conveyor.

Claim 6

The crushing plant of claim 1, further characterized by: A. a receiving unit mounted on the plant behind said rear crushing station, to receive input materials to be crushed; B. means on said receiving unit for separating the largest size pieces from the input material and for conducting such separated pieces into the primary crusher; C. means on said receiving unit for sorting out finish grade material from the input material and for delivering such finish grade material to the rear conveyor means; D. and means on said receiving unit for separating from the input material pieces of intermediate grade and for conducting the same into the secondary crusher.

Claim 7

The crushing plant of claim 1, further characterized by: A. means on the rear of the plant providing a receiving unit for input materials to be crushed; B. and means including screen members on said receiving unit for sorting out materials of two different sizes from the input material and for conducting materials of the larger size into the primary crusher and the materials of smaller size into the secondary crusher.

Claim 8

An elongated crushing plant having crushing means located at front and rear stations, rear conveyor means extending upwardly and forwardly from the underside of the crushing means at said rear station, and a final product delivery conveyor extending forwardly and upwardly from the underside of the crushing means at said front station, characterized by: A. the crushing means at the rear station comprising laterally adjacent primary and secondary crushers; B. said rear conveyor means comprising first and second conveyors having laterally adjacent portions beneath said primary and secondary crushers, respectively, to receive crushed materials discharging therefrom; C. a conveyor member for feeding materials to be crushed into the crushing means at said front station; D. an elevator to receive materials at a low level zone and to discharge the same onto said conveyor member from a high level zone; E. a vibratory screen unit behind the elevator, having top and botTom screen decks to receive materials discharging from said first and second conveyors, respectively, and to vibratorily conduct carryover materials thereon to said conveyor member and to said low level elevator zone, respectively, both of said screen decks being adapted to pass materials of final product size; F. means positioned under said bottom screen deck to receive and discharge materials of final product size onto said delivery conveyor; G. and means mounted between the front crushing means and the delivery conveyor for screening out larger than final product size pieces of the material discharging from the latter and for conducting such screened out material into said low level elevator zone.

Claim 9

An elongated crushing plant having crushing means located at front and rear stations, rear conveyor means extending upwardly and forwardly from the underside of the crushing means at said rear station, and a final product delivery conveyor extending forwardly and upwardly from the underside of the crushing means at said front station, characterized by: A. the crushing means at the rear station comprising laterally adjacent primary and secondary crushers; B. said rear conveyor means comprising first and second conveyors having laterally adjacent portions beneath said primary and secondary crushers, respectively, to receive crushed materials discharging therefrom; C. a conveyor member for feeding materials to be crushed into the crushing means at said front station; D. an elevator to receive materials at a low level zone and to discharge the same onto said conveyor member from a high level zone; E. a vibratory screen unit behind the elevator, having top and botTom screen decks to receive materials discharging from said first and second conveyors, respectively, and to vibratorily conduct carryover materials thereon to said conveyor member and to said low level elevator zone, respectively, both of said screen decks being adapted to pass materials of final product size; F. means positioned under said bottom screen deck to receive and discharge materials of final product size onto said delivery conveyor; G. and means mounted between the front crushing means and the delivery conveyor for screening out larger than final product size pieces of the material discharging from the latter and for conducting such screened out material into said low level elevator zone.

Claim 10

An elongated crushing plant having at its rear end portion an input station for materials to be crushed, and a crushing station forwardly thereof, characterized by: A. laterally adjacent primary and secondary crushers at said crushing station; B. laterally adjacent first and second conveyors extending forwardly and upwardly past the crushing station with their lower end portions disposed under the primary and secondary crushers, respectively, to receive crushed materials issuing therefrom and to discharge said materials at a location a distance forwardly of and at an elevation above said crushers; C. a vibratory material receiving and classifying unit at said input station, having a pair of superimposed screen members,

Claim 11

An elongated crushing plant having at its rear end portion an input station for materials to be crushed, and a crushing station forwardly thereof, characterized by: A. laterally adjacent primary and secondary crushers at said crushing station; B. laterally adjacent first and second conveyors extending forwardly and upwardly past the crushing station with their lower end portions disposed under the primary and secondary crushers, respectively, to receive crushed materials issuing therefrom and to discharge said materials at a location a distance forwardly of and at an elevation above said crushers; C. a vibratory material receiving and classifying unit at said input station, having a pair of superimposed screen members,

Claim 12

The crushing plant of claim 6, wherein said last named means comprises a conveyor member having its discharge end above and rearwardly adjacent to the rear of said second conveyor.

Claim 13

The crushing plant of claim 6, further characterized by: A. upper and lower belt conveyor members extending lengthwise of the plant beneath said receiving and classifying unit; B. the top stretch of the upper conveyor member being adapted to travel in a rearward direction and to discharge product deposited thereon at the rear of the plant; C. the top stretch of the lower conveyor member being adapted to travel in a forward direction for discharge of material thereon onto the rear of said second conveyor; D. and material routing means for directing materials which pass through said lower screen member selectively onto the top stretch of either the upper or the lower conveyor member.

Claim 14

The crushing plant of claim 8, further characterized by: A. a hopper into which material passing through the lower screen member falls; B. said upper conveyor being mounted in the hopper with its opposite sides in spaced relation to the side walls of the hopper; C. and wherein said material routing means comprises gate means carried by the hopper for movement from a first position directing all of the material passing through the lower screen member onto the upper conveyor, to a second position directing all of the material passing through the lower screen member onto the lower conveyor.

Claim 15

The crushing plant of claim 9, further characterized by means for holding said gate means in a plurality of different positions between said first and second positions thereof, so as to provide for the simultaneous routing of different selected amounts of material onto said upper and lower conveyor members.

Claim 16

The crushing plant of claim 6, further characterized by: A. saiD means for conducting carryover material discharging from the lower screen member into the secondary crusher comprises a first chute having a gate which can be moved to a position at which said carryover material bypasses the secondary crusher; B. and a second chute into which said carryover material flows in said bypass position of the gate, for conducting said carryover material onto the rear portion of said second conveyor.

Claim 17

The crushing plant of claim 11 further characterized by: A. a product delivery chute; B. and another gate movable to a position directing carryover material entering said second chute into the product delivery chute.

Claim 18

An elongated crushing plant, comprising the combination of: A. an elevator to receive material at a low level zone and to discharge said material at a high level zone; B. crushing means mounted on the plant forwardly adjacent to the elevator; C. a feed conveyor to conduct into the crushing means material discharged by the elevator; D. a main product delivery conveyor extending upwardly and forwardly under the crushing means and having its rear portion adjacent to said elevator; E. a screen member interposed between the delivery conveyor and the underside of the crushing means, to pass material of finish size to the delivery conveyor and to direct materials of larger size to said low level zone of the elevator; F. a material receiving unit rearwardly adjacent to the elevator having means including a vibratory top screen deck to advance materials of larger than finish size forwardly onto said feed conveyor, said unit having means including a bottom vibratory screen deck beneath said top screen deck to receive materials that pass through the latter and to vibrationally advance materials of larger than finish size forwardly into said low level zone of the elevator; G. and means mounted beneath said lower screen deck to receive materials of finish size and to conduct the same onto the rear portion of the delivery conveyor.

Claim 19

An elongated crushing plant, comprising the combination of: A. an elevator to receive material at a low level zone and to discharge said material at a high level zone; B. crushing means mounted on the plant forwardly adjacent to the elevator; C. a feed conveyor to conduct into the crushing means material discharged by the elevator; D. a main product delivery conveyor extending upwardly and forwardly under the crushing means and having its rear portion adjacent to said elevator; E. a screen member interposed between the delivery conveyor and the underside of the crushing means, to pass material of finish size to the delivery conveyor and to direct materials of larger size to said low level zone of the elevator; F. a material receiving unit rearwardly adjacent to the elevator having means including a vibratory top screen deck to advance materials of larger than finish size forwardly onto said feed conveyor, said unit having means including a bottom vibratory screen deck beneath said top screen deck to receive materials that pass through the latter and to vibrationally advance materials of larger than finish size forwardly into said low level zone of the elevator; G. and means mounted beneath said lower screen deck to receive materials of finish size and to conduct the same onto the rear portion of the delivery conveyor.

Claim 20

The crushing plant of claim 13, further characterized by: A. said last named means comprising a belt conveyor the top stretch of which receives materials that pass through said lower screen deck and conducts them forwardly to a discharge zone adjacent to the rear of the elevator when said conveyor is driven in one direction; B. and said delivery conveyor extending rearwardly under and beyond the elevator to have its rear end portion in position to receive materials leaving said conveyor at said discharge zone.

Claim 21

The crushing plant of claim 14, wherein said belt conveyor extends to a product delivery zone at the rear of the plant to there discharge material on its top stretch when said conveyor is driven in the opposite direction.

Claim 22

The crushing plant of claim 13, further characterized by a chute structure at the forward end of said bottom screen deck to receive materials discharging therefrom and having a spout to direct such materials forwardly to said low level zone of the elevator.

Claim 23

The crushing plant of claim 16, further characterized by: A. said chute structure having a second spout thereon to direct materials laterally toward a product delivery zone at one side of the plant; B. and gate means in said chute structure to govern the flow of materials through said spouts.

Claim 24

The crushing plant of claim 13, further characterized by: A. an imperforate vibratory deck which can be removably supported on the material receiving unit at a level between said top and bottom screen decks to receive material passing through the mesh of the top screen deck and vibrationally advance such material forwardly toward a discharge zone at the rear of the elevator; B. and a chute to receive material discharging from said imperforate deck and to spout the same toward a product delivery station at one side of the plant.

Claim 25

The crushing plant of claim 13, further characterized By: A. said crushing means comprising primary and secondary crushers; B. said feed conveyor conducting material discharged by the elevator into the secondary crusher; C. and another feed conveyor to conduct materials into the primary crusher from the top screen deck of the material receiving unit.

Claim 26

The crushing plant of claim 19, further characterized by: A. said primary and secondary crushers being located laterally adjacent to one another; B. and said feed conveyors extending forwardly to locations adjacent to the inlets of their respective crushers.

Claim 27

In a crushing plant, the combination of: A. an elongated supporting structure having a rearwardly located receiving station for input materials to be processed and a crushing station located forwardly thereof; B. crushing apparatus at said crushing station, having an inlet in an upper portion and an outlet in a lower portion; C. a delivery conveyor extending beneath the outlet of the crushing apparatus; D. means for separating from the input materials those of main product size and for conducting the same to the delivery conveyor; E. means for separating from the input materials those of larger than main product size and for conducting the same to the inlet of the crushing apparatus; F. said material separating means comprising a vibratory material receiving unit having upper and lower screens of the same size mesh; G. said means for conducting separated materials of main product size to the delivery conveyor comprising conveyor means mounted under the lower one of said screens to receive main product size material passing therethrough; H. feed conveyor means arranged to discharge input materials to be processed separately onto said screens; I. means for conducting carryover materials on said screens to the inlet of the crushing apparatus; J. means mounted between the delivery conveyor and the outlet of the crushing apparatus for intercepting crushed material of larger than main product size issuing therefrom while allowing those of main product size to drop onto the delivery conveyor; K. means for returning such intercepted material to the inlet of the crushing apparatus; L. said crushing apparatus comprising secondary crushing means; M. and primary crushing means located a distance rearwardly of said material receiving unit, and arranged to discharge crushed materials onto said feed conveyor means.

Claim 28

In a crushing plant, the combination of: A. an elongated supporting structure having a rearwardly located receiving station for input materials to be processed and a crushing station located forwardly thereof; B. crushing apparatus at said crushing station, having an inlet in an upper portion and an outlet in a lower portion; C. a delivery conveyor extending beneath the outlet of the crushing apparatus; D. means for separating from the input materials those of main product size and for conducting the same to the delivery conveyor; E. means for separating from the input materials those of larger than main product size and for conducting the same to the inlet of the crushing apparatus; F. said material separating means comprising a vibratory material receiving unit having upper and lower screens of the same size mesh; G. said means for conducting separated materials of main product size to the delivery conveyor comprising conveyor means mounted under the lower one of said screens to receive main product size material passing therethrough; H. feed conveyor means arranged to discharge input materials to be processed separately onto said screens; I. means for conducting carryover materials on said screens to the inlet of the crushing apparatus; J. means mounted between the delivery conveyor and the outlet of the crushing apparatus for intercepting crushed material of larger than main product size issuing therefrom while allowing those of main product size to drop onto the delivery conveyor; K. means for returning such intercepted material to the inlet of the crushing apparatus; L. said crushing apparatus comprising secondary crushing means; M. and primary crushing means located a distance rearwardly of said material receiving unit, and arranged to discharge crushed materials onto said feed conveyor means.

Claim 29

The crushing plant of claim 21, further characterized by: A. said primary crushing means comprising first and second stage crushers; B. and said feed conveyor means comprising a pair of conveyors, one for each of said first and second stage crushers to conduct crushed materials issuing therefrom to said material receiving unit.

Claim 30

An elongated crushing plant having crushing means located at spaced front and rear stations, and characterized by: A. a material receiving and classifying unit at a location between said stations; B. conveying means for conducting material crushed at said rear station to said material receiving and classifying unit; C. conveyor means to carry crushed materials of main product size from the crushing means at said front station to a product delivery zone; D. vibratory means on said receiving and classifying unit for separating from the materials conducted thereto those of larger than main product size; E. means for conducting such separated larger materials into the crushing means at said front station; F. and means on said receiving unit for separating from materials fed thereto those of main product size and for conducting the same to the delivery conveyor.

Claim 31

An elongated crushing plant having crushing means located at spaced front and rear stations, and characterized by: A. a material receiving and classifying unit at a location between said stations; B. conveying means for conducting material crushed at said rear station to said material receiving and classifying unit; C. conveyor means to carry crushed materials of main product size from the crushing means at said front station to a product delivery zone; D. vibratory means on said receiving and classifying unit for separating from the materials conducted thereto those of larger than main product size; E. means for conducting such separated larger materials into the crushing means at said front station; F. and means on said receiving unit for separating from materials fed thereto those of main product size and for conducting the same to the delivery conveyor.

Claim 32

The crushing plant of claim 23, wherein said vibratory means comprises a screen; and wherein said last named means comprises a vibratory carrying pan mounted under said screen.

Claim 33

An elongated crushing plant, comprisiNg the combination of: A. an elevator to receive material at a low level zone and to discharge said material at a high level zone; B. crushing means mounted on the plant forwardly adjacent to the elevator; C. a feed conveyor to conduct into the crushing means material discharged by the elevator; D. a main product delivery conveyor extending upwardly and forwardly under the crushing means and having its rear portion adjacent to said elevator; E. a screen member interposed between the delivery conveyor and the underside of the crushing means, to pass material of finish size to the delivery conveyor and to direct materials of larger size to said low level zone of the elevator; F. a material receiving unit rearwardly adjacent to the elevator having means including a vibratory screen deck to advance materials of larger than finish size forwardly onto said feed conveyor; G. and means beneath said screen deck to receive materials of finish size passing therethrough and to conduct the same to the main product delivery conveyor.

Claim 34

An elongated crushing plant, comprisiNg the combination of: A. an elevator to receive material at a low level zone and to discharge said material at a high level zone; B. crushing means mounted on the plant forwardly adjacent to the elevator; C. a feed conveyor to conduct into the crushing means material discharged by the elevator; D. a main product delivery conveyor extending upwardly and forwardly under the crushing means and having its rear portion adjacent to said elevator; E. a screen member interposed between the delivery conveyor and the underside of the crushing means, to pass material of finish size to the delivery conveyor and to direct materials of larger size to said low level zone of the elevator; F. a material receiving unit rearwardly adjacent to the elevator having means including a vibratory screen deck to advance materials of larger than finish size forwardly onto said feed conveyor; G. and means beneath said screen deck to receive materials of finish size passing therethrough and to conduct the same to the main product delivery conveyor.

Claim 35

An elongated crushing plant, characterized by: A. a secondary crushing device at a forward location, having an inlet at its top and an outlet at its bottom; B. a delivery conveyor extending under the outlet of the crushing device; C. an elevator wheel located rearwardly of the crushing device, to receive materials at a low level zone and to discharge said materials at a high level zone; D. means for conducting to the inlet of the crushing device materials discharging at said high level zone of the elevator; E. screen means located above the delivery conveyor and in position to intercept larger than main product size materials issuing from the outlet of the crushing device, for directing such intercepted materials to the low level inlet zone of the elevator wheel; F. a receiving unit located rearwardly of the elevator wheel, having means comprising a vibratory screen on an upper portion thereof to receive input materials to be processed, and on which oversize input materials are vibrationally advanced forwardly to a discharge zone adjacent to the elevator wheel; G. means to conduct such oversize materials from said discharge zone to the inlet of the crushing device along a path leading through the interior of the elevator wheel; H. said receiving unit having means including a second vibratory screen below said first designated screen, to intercept larger-than main product size materials but to pass and direct main product size materials to the delivery conveyor; I. means for conducting such larger materials from said second screen forwardly to the low level inlet zone of the elevator wheel; J. feed conveyor means for discharging materials to be processed separately onto said screens; K. means including said elevator wheel for conducting carryover material on said lower screen to the inlet of the crushing device; L. and primary crushing means located a distance rearwardly of said receiving unit, arranged to discharge materials crushed thereby onto said feed conveyor means.

Claim 36

An elongated crushing plant, characterized by: A. a secondary crushing device at a forward location, having an inlet at its top and an outlet at its bottom; B. a delivery conveyor extending under the outlet of the crushing device; C. an elevator wheel located rearwardly of the crushing device, to receive materials at a low level zone and to discharge said materials at a high level zone; D. means for conducting to the inlet of the crushing device materials discharging at said high level zone of the elevator; E. screen means located above the delivery conveyor and in position to intercept larger than main product size materials issuing from the outlet of the crushing device, for directing such intercepted materials to the low level inlet zone of the elevator wheel; F. a receiving unit located rearwardly of the elevator wheel, having means comprising a vibratory screen on an upper portion thereof to receive input materials to be processed, and on which oversize input materials are vibrationally advanced forwardly to a discharge zone adjacent to the elevator wheel; G. means to conduct such oversize materials from said discharge zone to the inlet of the crushing device along a path leading through the interior of the elevator wheel; H. said receiving unit having means including a second vibratory screen below said first designated screen, to intercept larger-than main product size materials but to pass and direct main product size materials to the delivery conveyor; I. means for conducting such larger materials from said second screen forwardly to the low level inlet zone of the elevator wheel; J. feed conveyor means for discharging materials to be processed separately onto said screens; K. means including said elevator wheel for conducting carryover material on said lower screen to the inlet of the crushing device; L. and primary crushing means located a distance rearwardly of said receiving unit, arranged to discharge materials crushed thereby onto said feed conveyor means.

Claim 37

The crushing plant of claim 26, further characterized by: A. said primary crushing means comprising first and second stage crushers; B. and said feed conveyor means comprising a pair of conveyors, one for each of said first and second stage crushers to conduct crushed materials issuing therefrom to said vibratory unit.

Claim 38

In a crushing plant, the combination of: A. an elongated supporting structure having a rearwardly located receiving station for input materials to be processed, and crushing stations located forwardly and rearwardly thereof; B. primary crushing means carried by the supporting structure at the rearward one of said crushing stations; C. secondary crushing means carried by the supporting structure at the forward one of said crushing stations, and having an inlet in an upper portion and an outlet in a lower portion; D. a delivery conveyor extending beneath the outlet of the secondary crushing means; E. feed conveyor means for conducting to the receiving station, input material comprising the crushed materials issuing from the primary crushing means; F. means for separating from said input materials those of main product size and for conducting the same to the delivery conveyor; G. means for separating from the input materials those of larger than main product size and for conducting the same to the inlet of the secondary crushing means; H. means mounted between the delivery conveyor and the outlet of the secondary crushing means for intercepting crushed material of larger than main product size issuing therefrom while allowing those of main product size to drop onto the delivery conveyor; I. and means for returning such intercepted material to the inlet of the secondary crushing means.

Claim 39

In a crushing plant, the combination of: A. an elongated supporting structure having a rearwardly located receiving station for input materials to be processed, and crushing stations located forwardly and rearwardly thereof; B. primary crushing means carried by the supporting structure at the rearward one of said crushing stations; C. secondary crushing means carried by the supporting structure at the forward one of said crushing stations, and having an inlet in an upper portion and an outlet in a lower portion; D. a delivery conveyor extending beneath the outlet of the secondary crushing means; E. feed conveyor means for conducting to the receiving station, input material comprising the crushed materials issuing from the primary crushing means; F. means for separating from said input materials those of main product size and for conducting the same to the delivery conveyor; G. means for separating from the input materials those of larger than main product size and for conducting the same to the inlet of the secondary crushing means; H. means mounted between the delivery conveyor and the outlet of the secondary crushing means for intercepting crushed material of larger than main product size issuing therefrom while allowing those of main product size to drop onto the delivery conveyor; I. and means for returning such intercepted material to the inlet of the secondary crushing means.

Claim 40

In a crushing plant, the combination of: A. an elongated supporting structure having a rearwardly located receiving station for input materials to be processed and a crushing station located forwardly thereof; B. crushing apparatus at said crushing station, having an inlet in an upper portion and an outlet in a lower portion; C. a delivery conveyor extending beneath the outlet of the crushing apparatus; D. means for separating from the input materials those of main product size and for conducting the same to the delivery conveyor; E. means for separating from the input materials those of larger than main product size and for conducting the same to the inlet of the crushing apparatus; F. said material separating means comprising a vibratory material receiving unit having upper and lower screens of the same size mesh, and an imperforate deck at a level between said screens for advancing materials deposited thereon to a product delivery zone intermediate said unit and the crushing apparatus; G. said means for conducting separated materials of main product size to the delivery conveyor comprising conveyor means mounted under the lower one of said screens to receive main product size material passing therethrough; H. feed conveyor means arranged to discharge input materials to be processed separately onto said screens; I. means for conducting carryover materials on said screens to the inlet of the crushing apparatus; J. means mounted between the delivery conveyor and the outlet of the crushing apparatus for intercepting crushed material of larger than main product size issuing therefrom while allowing those of main product size to drop onto the delivery conveyor; K. and means for returning such intercepted material to the inlet of the crushing apparatus.

Claim 41

In a crushing plant, the combination of: A. an elongated supporting structure having a rearwardly located receiving station for input materials to be processed and a crushing station located forwardly thereof; B. crushing apparatus at said crushing station, having an inlet in an upper portion and an outlet in a lower portion; C. a delivery conveyor extending beneath the outlet of the crushing apparatus; D. means for separating from the input materials those of main product size and for conducting the same to the delivery conveyor; E. means for separating from the input materials those of larger than main product size and for conducting the same to the inlet of the crushing apparatus; F. said material separating means comprising a vibratory material receiving unit having upper and lower screens of the same size mesh, and an imperforate deck at a level between said screens for advancing materials deposited thereon to a product delivery zone intermediate said unit and the crushing apparatus; G. said means for conducting separated materials of main product size to the delivery conveyor comprising conveyor means mounted under the lower one of said screens to receive main product size material passing therethrough; H. feed conveyor means arranged to discharge input materials to be processed separately onto said screens; I. means for conducting carryover materials on said screens to the inlet of the crushing apparatus; J. means mounted between the delivery conveyor and the outlet of the crushing apparatus for intercepting crushed material of larger than main product size issuing therefrom while allowing those of main product size to drop onto the delivery conveyor; K. and means for returning such intercepted material to the inlet of the crushing apparatus.

Claim 42

An elongated crushing plant, characterized by: A. a crushing device at a forward location, having an inlet at its top and an outlet at its bottom; B. a delivery conveyor extending under the outlet of the crushing device; C. an elevator wheel located rearwardly of the crushing device, to receive materials at a low level zone and to discharge said materials at a high level zone; D. means for conducting to the inlet of the crushing device materials discharging at said high level zone of the elevator; E. screen means located above the delivery conveyor and in position to intercept larger than main product size materials issuing from the outlet of the crushing device, for directing such intercepted materials to the low level inlet zone of the elevator wheel; F. a receiving unit located rearwardly of the elevator wheel, having means comprising a vibratory screen on an upper portion thereof to receive input materials to be processed, and on which oversize input materials are vibrationally advanced forwardly to a discharge zone adjacent to the elevator wheel; G. means to conduct such oversize materials from said discharge zone to the inlet of the cRushing device along a path leading through the interior of the elevator wheel; H. said receiving unit having means including a second vibratory screen below said first designated screen, to intercept larger than main product size materials but to pass and direct main product size materials to the delivery conveyor; I. means for conducting such larger materials from said second screen forwardly to the low level inlet zone of the elevator wheel; J. and an imperforate deck on the receiving unit at a level between said screens, to advance materials deposited thereon from the upper screen to a product delivery zone intermediate the receiving unit and the crushing device.

Claim 43

An elongated crushing plant, characterized by: A. a crushing device at a forward location, having an inlet at its top and an outlet at its bottom; B. a delivery conveyor extending under the outlet of the crushing device; C. an elevator wheel located rearwardly of the crushing device, to receive materials at a low level zone and to discharge said materials at a high level zone; D. means for conducting to the inlet of the crushing device materials discharging at said high level zone of the elevator; E. screen means located above the delivery conveyor and in position to intercept larger than main product size materials issuing from the outlet of the crushing device, for directing such intercepted materials to the low level inlet zone of the elevator wheel; F. a receiving unit located rearwardly of the elevator wheel, having means comprising a vibratory screen on an upper portion thereof to receive input materials to be processed, and on which oversize input materials are vibrationally advanced forwardly to a discharge zone adjacent to the elevator wheel; G. means to conduct such oversize materials from said discharge zone to the inlet of the cRushing device along a path leading through the interior of the elevator wheel; H. said receiving unit having means including a second vibratory screen below said first designated screen, to intercept larger than main product size materials but to pass and direct main product size materials to the delivery conveyor; I. means for conducting such larger materials from said second screen forwardly to the low level inlet zone of the elevator wheel; J. and an imperforate deck on the receiving unit at a level between said screens, to advance materials deposited thereon from the upper screen to a product delivery zone intermediate the receiving unit and the crushing device.