Sieving apparatus

Claim 2

In sieving apparatus comprising: an undercarriage, a belt conveyer having a frame comprising first and second frame sections and a hinge connecting said first and second frame sections at a hinge axis, said first frame section being pivotally movable about said hinge from an operating position in which said frame is extended to a travel position in which said first frame section extends close to and along said second frame section above the latter, said first frame section having a free end remote from said hinge which constitutes a discharge end of said conveyer, and a sieving machine comprising a sieve which is adapted to be driven and is pivoted to said first frame section near said discharge end on an axis which is transverse to the longitudinal direction of said frame, the improvement residing in that first hydraulic cylinder-piston means are provided for pivotally moving said sieve about said transverse axis, second hydraulic cylinder-piston means are provided for moving said first frame section about said hinge between said operating position and said travel position,

Claim 3

first and second links are provided, each of which has first and second ends, said first and second links being pivoted at their first ends to said first and second frame sections, respectively, at a distance from said hinge, and being pivoted to each other at their second ends which are disposed above said second frame section, and said second cylinder-piston means are pivoted at one end to at least one of said first and second links adjacent to said second end thereof and are pivoted at the other end to said second frame section at a location on an opposite side of said first end of said second link across said hinge, said undercarriage consisting of a one-axle undercarriage comprising wheels and struts which carry said wheels are pivoted to said second frame section and pivotally movable about a transverse axis which is parallel to said hinge axis and spaced from an opposite end of said second frame section remote from said hinge and from said hinge,

Claim 4

first and second links are provided, each of which has first and second ends, said first and second links being pivoted at their first ends to said first and second frame sections, respectively, at a distance from said hinge, and being pivoted to each other at their second ends which are disposed above said second frame section, and said second cylinder-piston means are pivoted at one end to at least one of said first and second links adjacent to said second end thereof and are pivoted at the other end to said second frame section at a location on an opposite side of said first end of said second link across said hinge, said undercarriage consisting of a one-axle undercarriage comprising wheels and struts which carry said wheels are pivoted to said second frame section and pivotally movable about a transverse axis which is parallel to said hinge axis and spaced from an opposite end of said second frame section remote from said hinge and from said hinge,

Claim 5

means being provided which define for said struts an upstanding position in which said struts extend substantially at a right angle to said second frame section, and a travel position, in which said wheels are nearer to said second frame section and to said opposite end thereof than when said struts are in said upstanding position, said wheels lying beneath said sieving machine when said sieving machine is swung to overlie said first frame section in said travel position thereof, hydraulic piston-cylinder means being provided for moving said struts between said upstanding and travel positions, said second frame section is formed at the end which is opposite to said hinge to constitute a supporting foot adapted to support said sieving apparatus when said frame is extended, and additional downwardly extending struts are connected to said second frame section between said opposite end and said undercarriage and consist of hydraulic cylinder-piston units which are extensible as far as to the ground and to move said belt conveyer to a position in which said undercarriage is pivotally movable when said first frame section is in said travel position.

Claim 6

means being provided which define for said struts an upstanding position in which said struts extend substantially at a right angle to said second frame section, and a travel position, in which said wheels are nearer to said second frame section and to said opposite end thereof than when said struts are in said upstanding position, said wheels lying beneath said sieving machine when said sieving machine is swung to overlie said first frame section in said travel position thereof, hydraulic piston-cylinder means being provided for moving said struts between said upstanding and travel positions, said second frame section is formed at the end which is opposite to said hinge to constitute a supporting foot adapted to support said sieving apparatus when said frame is extended, and additional downwardly extending struts are connected to said second frame section between said opposite end and said undercarriage and consist of hydraulic cylinder-piston units which are extensible as far as to the ground and to move said belt conveyer to a position in which said undercarriage is pivotally movable when said first frame section is in said travel position.

Claim 7

The improvement set forth in claim 1 wherein a platform is disposed below said second frame section and is hinged to the latter near that end of said second frame section which is opposite to said hinge,

Claim 8

said platform carries power supply and distributing means for the operation of the sieving apparatus.

Claim 9

said platform carries power supply and distributing means for the operation of the sieving apparatus.

Claim 10

The improvement set forth in claim 2, wherein said power supply and distributing means comprise a hydraulic pump for supplying hydraulic fluid to said cylinder-piston means and an internal-combustion engine for driving said hydraulic pump.

Claim 11

The improvement set forth in claim 3 as applied to sieving apparatus in which said belt conveyor comprises a reversing pulley rotatably mounted in said first frame section near said discharge end, and endless conveyor belt trained around said revering pulley and extending along said first and second frame sections, and a motor for driving said belt, wherein said motor is a rotary hydraulic motor that is coupled to said reversing pulley, a slide is provided, which is mounted on said first frame section near said discharge end and is slidable along said first frame section, said hydraulic pump is operable to supply hydraulic fluid also to said rotary hydraulic motor.