GB2181631A - A manual tractor - Google Patents

Abstract

Man-propelled wheeled soil working equipment comprises a driving-arm 10 and an uniaxially mounted lever system. This includes a trailing lever load-arm 9 and a central lever unit made up of a primary-arm 1 and fork-arm 2. Attachments such as the scraper 11, are bolted to the load-arm. The driving-arm 10 is so secured to the primary-arm 1 that pushing on its handles causes the scraper 11 to be pressed into, and drawn through the soil, thus working the land. The equipment converts to carrier (fig 6) when the driving-arm is swung to the side opposite the load-arm and a box is fastened on top of the load-arm. Further, removing the box and replacing the lower attachment by a scooping implement converts the machine into a shovel. <IMAGE>

Description

SPECIFICATION A manual tractor This invention relates to a manually propelled tractor.

Farm tools range from the simple hand type such as the hoe and the cutlass to the modern multi-attachmenttractor. Like the latterthe manual tractor is designed to accept different land-working attachments and is expected to join the ranks of farm tools bridging the gap between the simple hand implements and the modern motorised equipment.

According to this invention a machine is provided which is not only propelled forward by pushing, but produces simultaneously, through the action of a coupled lever system, a downward thrust on a trailing lever arm. A suitable attachment to this arm can therefore be made to work the land. Secondly by a slight rearrangement of parts and with the aid of suitable attachments the machine readily converts to a shovel orto a carrierfor implements, foodstuff etc.

One particular form ofthe basic machine eliminates the use of orthodox bearings and accommodates all parts ofthe lever system between its wheels. It has a driving-arm with handles, an axial assembly of parts, and a load frame. Itwill now be described with the aid of the accompanying drawings in which Figure 1 shows in perspectivethetractorwithout any attachment.

Figure 2 shows the machine with a bolted-on earth scraper.

Figure 3 shows the axial assembly.

Figure 4 shows the load frame.

Figure 5 illustrates the assembly of parts excluding the wheels.

Figure 6 shows the machine converted into a carrier by bolting a box onto the load-arm.

The axial assembly Fig. 3 has a sleeved-on central lever unit made up of a primary-arm 1 and afork-arm 2 which may be in-line or inclined to each other. It has two sleeves 5 for the mounting ofthe load frame Fig. 4, and suitably shaped and drilled wheel-mounting plates 6 at or near either end ofthe axle. The bottom end ofthe driving-arm 10 issecuredtothe primary- arm of the central leverunit.

The load frame Fig. 4 is of rectangularshape. It has a sleeve7 atone end and holes on the load-arm 9forthe fixing bolts of attachments. It is sat on the sleeves 5 and secured thereon by welding or by the catch-andboltarrangement8shown.

The machine when assembled with scraper attach ment 11 butwithoutwheels, is as in Fig. 5 which illustrates the relationship between parts. Note particularlythe conversion ofthefork-arm 2 into a working fork4which interlocks with the sleeved end ofthe load frame and may be made to lift or drop this end according to the force acting on the primary-arm ofthe central lever unit.

Fig. 1 illustrates the complete basic machine. Fig. 2 shows it with scraper attachment 11. In use the driving-arm will be inclinded to the vertical and pushing on its handles leads to steady scraping ofthe earth as the scraper is simultaneously pressed into the soil and dragged along.

It is expectedthat suitably designed attachments will allowthe tractorto be usedfortilling the land and for planting.

To convert the machine into a carrier, as shown in Fig . 6, the driving-arm is swung over to the fork end, and a carrier box, with suitable means for fastening, is mounted on and bolted tothe load-arm. Asthe driving-arm is swung further its side comes to rest against the fork-arm's butt 3 which acts as the fulcrum of yet another lever. Thus a further swing lifts the box and pushing on the handles moves itforward. When operated in this way any attached implement becomes a footforthe machine.

Lastly, with the driving-arm maintained atthe fork end, the machine may be converted into a shovel by taking down the carrier box and replacing the lower attachment by a broad scooping implement. At some particular inclination ofthe driving-arm to the vertical, pushing on the handles causes the machine to scoop material in its path. At some different and larger inclination, the carrier mode comes into operation and allows what has been scooped to be carried away.

1. A manual tractor is proposed in the form of a wheeled unaxially mounted system of levers with a driving-arm and a trailing load-arm. Coupling between the driving-arm and the lever system is such that any suitable land-working implement attached to the load-arm is driven into the soil and drawn along as the machine is pushed forward.

2. A manual tractors in Claim 1 converts to carrier when a suitable box is bolted onto the load-arm and the driving-arm isswung into position oppositethe load-arm. The buttofthe fork-arm can now act as a fulcrum and allowthe box to be raised. Thereafter it can simply be pushed along.

3. A manual tractor as in Claim 1 converts into a shovel when the driving-arm is swung to the fork end ofthe machine and a broad scooping implement is attached to the underside ofthe load-arm.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION A manual tractor This invention relates to a manually propelled tractor. Farm tools range from the simple hand type such as the hoe and the cutlass to the modern multi-attachmenttractor. Like the latterthe manual tractor is designed to accept different land-working attachments and is expected to join the ranks of farm tools bridging the gap between the simple hand implements and the modern motorised equipment. According to this invention a machine is provided which is not only propelled forward by pushing, but produces simultaneously, through the action of a coupled lever system, a downward thrust on a trailing lever arm. A suitable attachment to this arm can therefore be made to work the land. Secondly by a slight rearrangement of parts and with the aid of suitable attachments the machine readily converts to a shovel orto a carrierfor implements, foodstuff etc. One particular form ofthe basic machine eliminates the use of orthodox bearings and accommodates all parts ofthe lever system between its wheels. It has a driving-arm with handles, an axial assembly of parts, and a load frame. Itwill now be described with the aid of the accompanying drawings in which Figure 1 shows in perspectivethetractorwithout any attachment. Figure 2 shows the machine with a bolted-on earth scraper. Figure 3 shows the axial assembly. Figure 4 shows the load frame. Figure 5 illustrates the assembly of parts excluding the wheels. Figure 6 shows the machine converted into a carrier by bolting a box onto the load-arm. The axial assembly Fig. 3 has a sleeved-on central lever unit made up of a primary-arm 1 and afork-arm 2 which may be in-line or inclined to each other. It has two sleeves 5 for the mounting ofthe load frame Fig. 4, and suitably shaped and drilled wheel-mounting plates 6 at or near either end ofthe axle. The bottom end ofthe driving-arm 10 issecuredtothe primary- arm of the central leverunit. The load frame Fig. 4 is of rectangularshape. It has a sleeve7 atone end and holes on the load-arm 9forthe fixing bolts of attachments. It is sat on the sleeves 5 and secured thereon by welding or by the catch-andboltarrangement8shown. The machine when assembled with scraper attach ment 11 butwithoutwheels, is as in Fig. 5 which illustrates the relationship between parts. Note particularlythe conversion ofthefork-arm 2 into a working fork4which interlocks with the sleeved end ofthe load frame and may be made to lift or drop this end according to the force acting on the primary-arm ofthe central lever unit. Fig. 1 illustrates the complete basic machine. Fig. 2 shows it with scraper attachment 11. In use the driving-arm will be inclinded to the vertical and pushing on its handles leads to steady scraping ofthe earth as the scraper is simultaneously pressed into the soil and dragged along. It is expectedthat suitably designed attachments will allowthe tractorto be usedfortilling the land and for planting. To convert the machine into a carrier, as shown in Fig . 6, the driving-arm is swung over to the fork end, and a carrier box, with suitable means for fastening, is mounted on and bolted tothe load-arm. Asthe driving-arm is swung further its side comes to rest against the fork-arm's butt 3 which acts as the fulcrum of yet another lever. Thus a further swing lifts the box and pushing on the handles moves itforward. When operated in this way any attached implement becomes a footforthe machine. Lastly, with the driving-arm maintained atthe fork end, the machine may be converted into a shovel by taking down the carrier box and replacing the lower attachment by a broad scooping implement. At some particular inclination ofthe driving-arm to the vertical, pushing on the handles causes the machine to scoop material in its path. At some different and larger inclination, the carrier mode comes into operation and allows what has been scooped to be carried away. CLAIMS

1. A manual tractor is proposed in the form of a wheeled unaxially mounted system of levers with a driving-arm and a trailing load-arm. Coupling between the driving-arm and the lever system is such that any suitable land-working implement attached to the load-arm is driven into the soil and drawn along as the machine is pushed forward.

2. A manual tractors in Claim 1 converts to carrier when a suitable box is bolted onto the load-arm and the driving-arm isswung into position oppositethe load-arm. The buttofthe fork-arm can now act as a fulcrum and allowthe box to be raised. Thereafter it can simply be pushed along.

3. A manual tractor as in Claim 1 converts into a shovel when the driving-arm is swung to the fork end ofthe machine and a broad scooping implement is attached to the underside ofthe load-arm.