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US 2013/0078070 A1Published application
Lift Arms and Linkage Arrangement for Scoop Assembly
AssigneeCaterpillar Inc.
InventorMichael P. May
Life of this patent
Estimating the term…
Abstract
A scoop assembly is disclosed for a wheel dozer. The scoop assembly includes a frame that includes right and left lift arms that may be coupled together by a distal cross beam. The lift arms include proximal portions that extend between the two cross beams and a distal hook-shaped portion that extends forward beyond the distal cross beam. The distal hook-shaped portions pivotally connect to the bucket. The distal cross beam provides a place for the location of a bracket that supports a single dump cylinder that extends upward into a central pocket disposed in the back of the bucket. The dump cylinder is protected from debris due to its raised position and placement inside a centralized pocket that does not experiment the flow of debris materials.
Claims20
A scoop assembly comprising:
- right and left lift arms, each lift arm including a proximal end, a proximal portion, a distal portion and a distal end, each proximal portion disposed between its respective proximal end and its respective hook shaped distal portion, each hook shaped distal portion disposed between its respective proximal portion and its respective distal end, the right and left lift arms being coupled together by a distal cross beam;
- a bucket including right and left sidewalls and a curved wall disposed therebetween, the distal ends of right and left lift arms being pivotally coupled to the right and left sidewalls respectively, the bucket further including a center pocket with a rear opening;
- the distal cross beam being coupled to one end of a dump cylinder having another end that is received in and pivotally connected to the central pocket of the bucket.
A scoop assembly comprising:
- right and left lift arms, each lift arm including a proximal end, a proximal portion, a distal portion and a distal end, each proximal portion disposed between respective its proximal end and respective its hook shaped distal portion, each hook shaped distal portion disposed between its respective proximal portion and its respective distal end, the right and left lift arms being further coupled together by a distal cross beam;
- a bucket comprising right and left sidewalls and a curved wall disposed therebetween, the right sidewall includes a right pocket with a rear opening for receiving the distal end and at least part of the distal portion of the right lift arm, the left sidewall including a left pocket with a rear opening for receiving the distal end and at least part of the distal portion of the left lift arm, the distal ends of right and left lift arms being pivotally coupled to the right and left sidewalls respectively while being disposed inside the right and left pockets respectively;
- the bucket further including a center pocket with a rear opening, the distal cross beam being coupled to one end of a dump cylinder having another end that is received in and pivotally connected to the central pocket of the bucket.
A scoop assembly comprising:
- right and left lift arms, each lift arm including a proximal end, a proximal portion, a distal end, and a distal portion, each proximal portion disposed between its respective proximal end and its respective distal portion, each distal portion disposed between its respective proximal portion and its respective distal end;
- a bucket comprising right and left sidewalls and a curved wall disposed therebetween, the right sidewall includes a right pocket with a rear opening for receiving the distal end and at least part of the distal portion of the right lift arm, the left sidewall including a left pocket with a rear opening for receiving the distal end and at least part of the distal portion of the left lift arm, the distal ends of right and left lift arms being pivotally coupled to the right and left sidewalls respectively while being disposed inside the right and left pockets respectively;
- the bucket further including a center pocket with a rear opening, the distal cross beam being coupled to one end of a dump cylinder having another end that is received in and pivotally connected to the central pocket of the bucket;
- right and left tilt cylinders, right and left tilt levers, and right and left cylinder brackets, the right tilt lever being pivotally coupled to the proximal end of the right lift arm, the left tilt lever being pivotally coupled to the proximal end of the left lift arm, the right cylinder bracket being coupled to the right lift arm between the proximal and distal ends thereof, the left cylinder bracket being coupled to the left lift arm between the proximal and distal ends thereof, a proximal cross beam extending between and being pivotally and slidably coupled to the right and left tilt levers;
- wherein retraction of the right tilt cylinder in combination with extension of the left tilt cylinder causing the right and left lift arms and the bucket to tilt to the right while the proximal cross beam remains stationary and coupled to the right and left tilt levers and wherein extension of the right tilt cylinder in combination with retraction of the left tilt cylinder causing the right and left lift arms and the bucket to tilt to the left while the proximal cross beam remains stationary and coupled to the right and left tilt levers.
2 more elements
Dependencies are inferred from the claim text.