Material-removing scraper with an articulated boom

Claim 2

A material-removing scraper including scraper jib means mounted for substantially vertical up and down movement, elevating means for moving said jib means substantially vertically up and down, said scraper jib means comprising an articulated boom including first and second boom parts, said first and second boom parts having longitudinal axes and adjacent boom ends positioned adjacent one another, flexible connection means flexibly connecting said adjacent boom ends for tilting movement of said first and second boom parts relative to one another in a substantially vertical plane, said flexible connection means connecting said boom ends for positioning of one of said adjacent boom ends at a level above the other of said adjacent boom ends, said connection means comprising arm means rigidly connected with one of said boom parts and extending away therefrom at an angle to its longitudinal axis, said arm means being flexibly connected with the other of said boom parts.

Claim 3

A material-removing scraper including scraper jib means mounted for substantially vertical up and down movement, elevating means for moving said jib means substantially vertically up and down, said scraper jib means comprising an articulated boom including first and second boom parts, said first and second boom parts having longitudinal axes and adjacent boom ends positioned adjacent one another, flexible connection means flexibly connecting said adjacent boom ends for tilting movement of said first and second boom parts relative to one another in a substantially vertical plane, said flexible connection means connecting said boom ends for positioning of one of said adjacent boom ends at a level above the other of said adjacent boom ends, said connection means including rigid member means connected with each of said boom parts by movable hinge joint means having parallel swivel axes, and rigidifying means for rigidifying at least one of said movable hinge joint means.

Claim 4

A material-removing scraper including scraper jib means mounted for substantially vertical up and down movement, elevating means for moving said jib means substantially vertically up and down, said scraper jib means comprising an articulated boom including first and second boom parts, said first and second boom parts having longitudinal axes and adjacent boom ends positioned adjacent one another, flexible connection means flexibly connecting said adjacent boom ends for tilting movement of said first and second boom parts relative to one another in a substantially vertical plane, said flexible connection means connecting said boom ends for positioning of one of said adjacent boom ends at a level above the other of said adjacent boom ends, said connection means including rigid member means connected with each of said boom parts by movable hinge joint means having parallel swivel axes, and rigidifying means for rigidifying at least one of said movable hinge joint means.

Claim 5

The device of claim 2 wherein said connection means includes an intermediate link pivotally connected with one of said boom parts, adjustable locking means for selectively locking said intermediate link in a plurality of pivoted positions, and arm means pivotally connected to said intermediate link and rigidly connected to the other of said boom parts.

Claim 6

The device of claim 3 wherein said adjustable locking means comprises a mechanical lock.

Claim 7

The device of claim 3 wherein said intermediate link comprises a substantially triangular plate having a plurality of triangular points, said plate being pivotally connected with said arm means at one of said triangular points and to said one boom part at another of said triangular points, and extensible means connected with a third of said triangular points.

Claim 8

The device of claim 3 wherein said adjustable locking means comprises a hydraulic cylinder and piston pivotally connected with said intermediate link and one of said boom parts.

Claim 9

A material-removing scraper including scraper jib means mounted for substantially vertical up and down movement, elevating means for moving said jib means substantially vertically up and down, said scraper jib means comprising an articulated boom including first and second boom parts, said first and second boom parts having longitudinal axes and adjacent boom ends positioned adjacent one another, flexible connection means flexibly connecting said adjacent boom ends for tilting movement of said first and second boom parts relative to one another in a substantially vertical plane, said boom parts being lowerable to a substantially lowermost position in which said longitudinal axes extend in substantially straight elongation of one another, said flexible connection means connecting said boom ends for positioning of one of said adjacent boom ends at a level above the other of said adjacent boom ends when said boom parts are substantially in said lowermost position.

Claim 10

A material-removing scraper including scraper jib means mounted for substantially vertical up and down movement, elevating means for moving said jib means substantially vertically up and down, said scraper jib means comprising an articulated boom including first and second boom parts, said first and second boom parts having longitudinal axes and adjacent boom ends positioned adjacent one another, flexible connection means flexibly connecting said adjacent boom ends for tilting movement of said first and second boom parts relative to one another in a substantially vertical plane, said boom parts being lowerable to a substantially lowermost position in which said longitudinal axes extend in substantially straight elongation of one another, said flexible connection means connecting said boom ends for positioning of one of said adjacent boom ends at a level above the other of said adjacent boom ends when said boom parts are substantially in said lowermost position.

Claim 11

The device of claim 7 wherein said boom parts have oPposite boom ends remote from said adjacent boom ends, said opposite boom ends being positioned below said one boom end when said one boom end is positioned at a level above the other of said boom ends.

Claim 12

A material-removing scraper including scraper jib means mounted for substantially vertical up and down movement, elevating means for moving said jib means substantially vertically up and down, said scraper jib means comprising an articulated boom including first and second boom parts, said first and second boom parts having longitudinal axes and adjacent boom ends positioned adjacent one another, flexible connection means flexibly connecting said boom ends for tilting movement of said first and second boom parts relative to one another in a substantially vertical plane, said flexible connection means connecting said boom ends for positioning of one of said first and second boom parts in a first plane and for positioning the other of said boom parts in a second plane substantially parallel to said first plane and located above said first plane so that said boom end on said other boom part is displaced to a level above said boom end on said one boom part when said boom parts are in substantially parallel positions.

Claim 13

A material-removing scraper including scraper jib means mounted for substantially vertical up and down movement, elevating means for moving said jib means substantially vertically up and down, said scraper jib means comprising an articulated boom including first and second boom parts, said first and second boom parts having longitudinal axes and adjacent boom ends positioned adjacent one another, flexible connection means flexibly connecting said boom ends for tilting movement of said first and second boom parts relative to one another in a substantially vertical plane, said flexible connection means connecting said boom ends for positioning of one of said first and second boom parts in a first plane and for positioning the other of said boom parts in a second plane substantially parallel to said first plane and located above said first plane so that said boom end on said other boom part is displaced to a level above said boom end on said one boom part when said boom parts are in substantially parallel positions.

Claim 14

The device of claim 9 wherein said other of said boom parts has an opposite boom end opposite said adjacent boom end thereof, said opposite boom end on said other boom part being positioned below said adjacent boom end thereof when said adjacent boom end is at a level above said boom end on said one boom part.

Claim 15

The device of claim 9 wherein said connection means comprises a rigid member connected with each of said boom parts by a movable hinge joint, said hinge joints having parallel swivel axes.

Claim 16

The device of claim 11 wherein said elevating means comprises a plurality of separate hoisting units, each of said boom parts being connected with a separate one of said hoisting units whereby selective operation of said hoisting units adjustably positions said adjacent boom ends at various levels relative to one another.

Claim 17

The device of claim 12 wherein one of said hoisting units is connected with one of said boom parts adjacent said adjacent boom end thereof and another of said hoisting units is connected with said one boom part at a point remote from said adjacent boom end thereof.

Claim 18

The device of claim 9 and further including rigidifying means for rigidifying said connection means.

Claim 19

The device of claim 9 wherein said connection means includes link means pivotally connected to each of said first and second boom parts, and adjustable locking means for adjustably locking said link means in a plurality of pivoted positions.

Claim 20

The device of claim 9 wherein said connection means comprises rigid arm means rigidly connected to one of said boom parts and extending away therefrom at an angle to said longitudinal axis of said one boom part, said arm means being flexibly connected to the other of said boom parts.