Earth working machine including scraper blade means

Claim 2

An earth working machine adapted to be connected to a tractor to be towed by the tractor comprising elongated scraper blade means extending across the machine between the sides of the machine, said scraper blade means including a pair of blade sections disposed end to end and pivot means pivotally interconnecting adjacent ends of the blade sections to enable relative pivotal movement about a substantially horizontal axis extending transversely of the blade means, at least a pair of ground-traveling supporting devices positioned to the rear of said scraper blade means, with one disposed adjacent one side and the other adjacent the other side of said machine, power-operated means for each supporting device mounting the device on said blade means and on being actuated operable to change the relative elevation of the supporting device with respect to said blade means, the power-operated means for each supporting device being actuatable independently of the other, draft means extending forwardly of the blade means for connecting the machine to the tractor, and a remote control for said power-operated means flexibly connected thereto, adapted to be positioned adjacent the operator of the tractor whereby the same may be manipulated by such operator during towing of the machine.

Claim 3

The earth working machine of claim 1, wherein said scraper blade means includes at least one end thereof a blade extension extendible outwardly along the axis of the scraper blade means to one side of the machine, and wherein the ground-traveling device which is at said one side of the machine is adjustably mounted for movement outwardly in a direction substantially paralleling said axis.

Claim 4

The earth working machine of claim 1, wherein power-operated means is provided between the blade sections to permit relative adjustable pivotal movement in the blade sections under power, each of said ground-traveling support devices comprises a wheel, and said power-operated means for mounting a device comprises a bar having the wheel journaled on an end thereof, a sleeve mounting said bar extending along the axis of said scraper blade means with the bar adjustably extensible in said sleeve, means disposed to the rear of said blade means mounting said sleeve for vertical movement relative to the blade means, and a hydraulic motor positioned between the sleeve and blade means for adjusting the position of said sleeve under power.

Claim 5

The earth working machine of claim 1, wherein said scraper blade means further comprises power-operated means provided between the blade sections to permit relative adjustable pivotal movement in the blade sections under power.

Claim 6

The earth working machine of claim 1, which further includes draft means for towing the machine, said draft means comprising a pair of draft arm structures extending forwardly from the scraper blade means with coupling means at the forward extremities of such structures for making a draft connection with a tractor, and means disposed intermediate said draft arm structures for connecting the machine to the lift arm structure of a tractor, each draft arm structure comprising a pair of draft bars joined at their forward ends, a forwardly projecting stanchion for each draft arm structure connected to and extending above the scraper blade means, the draft bars in a draft arm structure being connected at their rear ends to a stanchion at vertically spaced points.

Claim 7

In combination with a tractor having a frame, traction wheels at the rear end thereof, and power-operated hitch arms movable up and down under power disposed between said wheels at the rear of the tractor, an elongated scraper blade means disposed to the rear of said tractor wheels, a pair of draft arm structures straddling the tractor frame and journaled to the tractor frame at a point disposed forwardly of said traction wheels, said arm structures being connected to the scraper blade means adjacent opposite ends, means disposed between said draft arm structures joining the scraper blade means and the tractor hitch arms to enable raising and lowering of the blade means with raising and lowering of said arms, at least a pair of scraper blade ground-traveling supports disposed to the rear of said scraper blade means, and power-operated means for each scraper blade support mounting the support on said blade and on being actuated operable to change the relative elevation of the support with respect to said scraper blade means.

Claim 8

In combination with a tractor having a frame, traction wheels at the rear end thereof, and power-operated hitch arms movable up and down under power disposed between said wheels at the rear of the tractor, an elongated scraper blade means disposed to the rear of said tractor wheels, a pair of draft arm structures straddling the tractor frame and journaled to the tractor frame at a point disposed forwardly of said traction wheels, said arm structures being connected to the scraper blade means adjacent opposite ends, means disposed between said draft arm structures joining the scraper blade means and the tractor hitch arms to enable raising and lowering of the blade means with raising and lowering of said arms, at least a pair of scraper blade ground-traveling supports disposed to the rear of said scraper blade means, and power-operated means for each scraper blade support mounting the support on said blade and on being actuated operable to change the relative elevation of the support with respect to said scraper blade means.

Claim 9

The combination of claim 6, wherein a pair of forwardly projecting stanchions are joined to the scraper blade means, one for each draft arm structure, and each draft arm structure comprises a pair of draft bars joined at their forward ends and connected at vertically spaced points at their rear ends to a stanchion.

Claim 10

The combination of claim 7, wherein at least one draft arm bar in a draft arm structure is adjustably extensible.

Claim 11

The combination of claim 6, wherein said scraper blade means comprises a pair of blade sections disposed end-to-end with pivot means pivotally interconnecting adjacent ends of the blade sections to enable relative pivotal movement about an axis extending normal to the blade sections, and said scraper blade ground-traveling supports are disposed with one located toward one end of the blade means from said pivot means and the other located toward the other end of the blade means from said pivot means.

Claim 12

The combination of claim 6, wherein said scraper blade means includes at at least one end a blade extension extensible outwardly along the axis of the scraper blade means, and wherein a scraper blade ground-traveling support located to the rear of said end of said blade means is adjustably mounted for movement outwardly in a direction substantially paralleling the axis of the blade means.

Claim 13

An earth working machine adapted to be towed behind a vehicle comprising an elongated scraper blade means extending across the machine between the sides of the machine, said scraper blade means comprising a pair of blade sections disposed end-to-end and pivot means pivotally interconnecting adjacent ends of the blade sections to enable relative pivotal movement about a substantially horizontal axis extending transversely of the blade sections, power-operated means interposed between the blade sections for producing relative adjustable pivotal movement under power, at least a pair of ground-traveling support devices disposed to the rear of the scraper blade means with one located toward one end of the blade means from said pivot means and one located toward the opposite end of the blade means from said pivot means, and power-operated means mounting each of said ground-traveling support devices on the blade means operable to produce on actuation thereof a change in the relative elevation of the ground-traveling support device with respect to said blade means, the power-operated means for the respective ground-traveling support devices being actuatable independently of each other.

Claim 14

An earth working machine adapted to be towed behind a vehicle comprising an elongated scraper blade means extending across the machine between the sides of the machine, said scraper blade means comprising a pair of blade sections disposed end-to-end and pivot means pivotally interconnecting adjacent ends of the blade sections to enable relative pivotal movement about a substantially horizontal axis extending transversely of the blade sections, power-operated means interposed between the blade sections for producing relative adjustable pivotal movement under power, at least a pair of ground-traveling support devices disposed to the rear of the scraper blade means with one located toward one end of the blade means from said pivot means and one located toward the opposite end of the blade means from said pivot means, and power-operated means mounting each of said ground-traveling support devices on the blade means operable to produce on actuation thereof a change in the relative elevation of the ground-traveling support device with respect to said blade means, the power-operated means for the respective ground-traveling support devices being actuatable independently of each other.

Claim 15

The earth working machine of claim 11, wherein the scraper blade means includes blade extensions extendible outwardly along the axis of the scraper blade means from opposite ends of the scraper blade means, and wherein the ground-traveling support devices are adjustably mounted for movement outwardly in a direction substantially paralleling said axis.

Claim 16

An earth working machine adapted to be towed behind a vehicle comprising an elongated scraper blade means extending across the machine between the sides of the machine, said scraper blade means comprising a pair of blade sections disposed end-to-end and pivot means pivotally interconnecting adjacent ends of the blade sections to enable relative adjustable pivotal movement about a substantially horizontal axis extending transversely of the blade means, means interposed between the blade sections for setting them at different relatively adjusted pivoted positions, at least a pair of ground-traveling support devices disposed to the rear of the scraper blade means with one located toward one end of the blade means from said pivot means and one located toward the opposite end of the blade means from said pivot means, power-operated means mounting each of said ground-traveling support devices on the blade means operable to produce on actuation thereof a change in the relative elevation of the ground-traveling support device with respect to said blade means, the scraper blade means further including at at least one end thereof, a blade extension extendible outwardly along the axis of the scraper blade means to one side of the machine, the ground-traveling device which is at said one side of the machine being adjustably mounted for movement outwardly in a direction substantially paralleling said axis.

Claim 17

An earth working machine adapted to be towed behind a vehicle comprising an elongated scraper blade means extending across the machine between the sides of the machine, said scraper blade means comprising a pair of blade sections disposed end-to-end and pivot means pivotally interconnecting adjacent ends of the blade sections to enable relative adjustable pivotal movement about a substantially horizontal axis extending transversely of the blade means, means interposed between the blade sections for setting them at different relatively adjusted pivoted positions, at least a pair of ground-traveling support devices disposed to the rear of the scraper blade means with one located toward one end of the blade means from said pivot means and one located toward the opposite end of the blade means from said pivot means, power-operated means mounting each of said ground-traveling support devices on the blade means operable to produce on actuation thereof a change in the relative elevation of the ground-traveling support device with respect to said blade means, the scraper blade means further including at at least one end thereof, a blade extension extendible outwardly along the axis of the scraper blade means to one side of the machine, the ground-traveling device which is at said one side of the machine being adjustably mounted for movement outwardly in a direction substantially paralleling said axis.