Back to results
US 7,937,858 B2Granted
Hitch assembly and tractor scraper using same
AssigneeCaterpillar Inc.
InventorRobert Doyle Roley
Life of this patent
Estimating the term…
Abstract
A hitch assembly includes a hitch assembly frame. A tow bar includes a shaft having a first end pivotably attached to the hitch assembly frame and a coupling member attached to a second end of the shaft. A push plate is pivotably attached to the hitch assembly frame and defines a vertically aligned slot. The tow bar is movable within the vertically aligned slot. Such a hitch assembly may be used to operate machines, such as tractor scrapers, in a push-pull configuration.
Claims19
A hitch assembly for facilitating push-pull operations, comprising:
- a hitch assembly frame configured to attach to a front frame of a machine;
- a tow bar including a shaft having a first end pivotably attached to the hitch assembly frame and a coupling member attached to a second end of the shaft;
- and
- a push plate pivotably attached to the hitch assembly frame and including a vertically aligned slot, the tow bar being movable within the vertically aligned slot, wherein the push plate is configured to engage a push block of a rear portion of another machine.
1 more element
A tractor scraper, comprising:
- a frame;
- a scraper bowl supported on the frame and having a scraper blade disposed at a front portion thereof;
- a tow bar including a shaft having a first end attached to the frame and a coupling member attached to a second end of the shaft;
- and
- a push plate pivotably attached to the frame and including a vertically aligned slot for receiving the tow bar in a pull configuration of the tow bar.
2 more elements
A hitch assembly, comprising:
- a tow bar including a shaft and a coupling member, a portion of the coupling member being configured to telescopically receive the shaft;
- an actuator for moving the tow bar between a stowed configuration and a deployed configuration;
- and
- wherein the coupling member is restricted from rotation about the shaft in a first axial position along the shaft and is rotatable about the shaft in a second axial position along the shaft.
1 more element
Dependencies are inferred from the claim text.