Portable crushing and screening plant
First Claim
1. In a portable crushing and screening plant including an elongated trailer main frame having a front portion and a rear portion, an axle structure mounting laterally spaced wheels supporting the rear portion of the main frame, a crusher mounted on the rear portion of the main frame and a screening device, characterized by,said screening device being disposed forwardly of said crusher and including a support frame pivotally connected at its rear end to said main frame for pivotal movement about a transverse axis between operating and transport positions, said screening device feeding oversize material to said crusher,an endless belt conveyor mechanism includinga fixed position section secured to and beneath said main frame, andan elevating section at the front end of said main frame generally forward of said screening device includingan upwardly extending bottom segment having its lower end pivotally connected to said main frame for vertical swinging movement about a transverse pivot axis between an upright operating position and a lowered transport position,a generally upright top segment pivotally connected at its lower end to the upper end of said bottom segment for vertical swinging movement between a raised operating position and a lowered transport position, andmeans connecting said segments to said support frame of said screening device whereby said segments are moved from their respective transport positions to their respective operating positions when said screening device is moved from its transport position to its operating position, andpower means operatively interposed between said trailer main frame and said screening device operable to move said screening device about its pivot connection with said main frame from its lowered transport position to its raised operating position.
3 Assignments
0 Petitions
Accused Products
Abstract
A mobile, portable crushing and screening plant includes a crusher (17), a screening device (31), and a conveyor (46) mounted on the trailer having a main frame (11) and support wheels (21-24). The screening device (31) is hinged for vertical swinging movement between a raised operating position and a lowered transport position. The conveyor mechanism (46) includes an elevating section (95) having a pair of hinged segments (103, 104) which are connected to the elevatable end of the screening device (31) so that both the hinged segments (103, 104) are raised and lowered between their operating and transport positions when the screening device (31) is moved by hydraulic actuators (121, 122) between its operating and transport positions. The main conveyor belt (48) passes rearwardly between the laterally spaced trailer wheels (21, 22 and 23, 24) with the working run being above and the return run being below the transverse wheel axles (73, 74). A receiving chute (47) for the main conveyor belt (48) is disposed rearwardly of the trailer main frame (11) and is mounted on a hinged section (79) of the conveyor (46) which is pivoted to the trailer main frame (11) adjacent the trailer wheels for swinging movement between a lowered operating position and a raised transport position.
40 Citations
16 Claims
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1. In a portable crushing and screening plant including an elongated trailer main frame having a front portion and a rear portion, an axle structure mounting laterally spaced wheels supporting the rear portion of the main frame, a crusher mounted on the rear portion of the main frame and a screening device, characterized by,
said screening device being disposed forwardly of said crusher and including a support frame pivotally connected at its rear end to said main frame for pivotal movement about a transverse axis between operating and transport positions, said screening device feeding oversize material to said crusher, an endless belt conveyor mechanism including a fixed position section secured to and beneath said main frame, and an elevating section at the front end of said main frame generally forward of said screening device including an upwardly extending bottom segment having its lower end pivotally connected to said main frame for vertical swinging movement about a transverse pivot axis between an upright operating position and a lowered transport position, a generally upright top segment pivotally connected at its lower end to the upper end of said bottom segment for vertical swinging movement between a raised operating position and a lowered transport position, and means connecting said segments to said support frame of said screening device whereby said segments are moved from their respective transport positions to their respective operating positions when said screening device is moved from its transport position to its operating position, and power means operatively interposed between said trailer main frame and said screening device operable to move said screening device about its pivot connection with said main frame from its lowered transport position to its raised operating position.
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8. In a portable crushing and screening plant including an elongated trailer main frame having a front portion and a rear portion, an axle structure having laterally spaced wheels mounted thereon operatively supporting the rear portion of the main frame, a crusher mounted on the rear portion of the main frame and a screening device, characterized by,
said screening device being disposed forwardly of said crusher and including a support frame pivotally connected at its rear end to said main frame for vertical swinging movement about a transverse axis between a raised operating position and a lowered transport position, said screening device feeding oversize material to said crusher, an endless belt conveyor mechanism mounted on said trailer main frame including a longitudinally extending portion in underlying relation to said main frame, an elevating section at said front portion of said trailer main frame including an upwardly extending bottom segment having its lower end pivotally connected to said main frame for vertical swinging movement about a transverse pivot axis between an upright operating position and a lowered transport position, a generally upright top segment pivotally connected at its lower end to the upper end of said bottom segment for vertical swinging movement between a raised operating position and a lowered transport position, and means connecting said segments to said support frame of said screening device whereby said segments are moved from their respective transport positions to their respective operating positions when said screening device is moved from its transport position to its operating position, power means operatively interposed between said trailer main frame and said screening device operable to move said screening device about its pivot connection with said main frame from its lowered transport position to its raised operating position, a first endless conveyor belt operatively supported on said longitudinal portion and elevating section having the rear portion of its working run in receiving relation to the output from said crusher, and a second endless belt operatively supported on said elevating section having face-to-face contact with a portion of the working run of said first belt, said belts being operable to elevate material being processed in said plant to said screening device.
Specification