Planting – Liquid or gas soil treatment
Patent
1997-09-12
1999-12-14
Pezzuto, Robert E.
Planting
Liquid or gas soil treatment
239147, A01C 506
Patent
active
060003499
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a rollable container for storing, transporting and distributing a mass having little or no cohesion, for instance
liquids incorporating possibly solid constituents, such as liquid manure or fertilizer, or
solid substances consisting of granules and/or powder. Such a container is known in various embodiments.
In order for instance to apply and distribute liquid manure in or on farmland, use is made according to the prior art of a tank truck or tanker supported by a number of wheels with pneumatic tires to transport this manure on the road and over the land. The contact pressure between the pneumatic tires and the terrain driven over is often so high in this prior art that driving over agricultural land can result in structural decomposition of this land. Another possibility is that on particular terrains it is very difficult or even impossible to use liquid manure within the framework of statutory provisions. Understood by the designation "structural decomposition" is that the soil is compacted such that this adversely affects the growth of crops.
The invention has for its object to provide a container wherein the contact pressure with the ground is considerably reduced or can, at least in some conditions, be reduced to harmless proportions.
SUMMARY OF THE INVENTION
This is generally realized with a rollable container of the described type, which has the feature that the container is embodied as a hollow wheel, which is mounted via rotation bearings for rotation in a frame which is coupled or can be coupled by means of coupling means to a motor vehicle, for instance a tractor, the space in said wheel being sealingly connected via a rotation bearing to a conduit which is stationary relative to the frame or at least occupies a substantially fixed position relative to the frame for supplying and discharging mass to and from the space, which wheel can roll over the ground during movement of the frame caused by the motor vehicle.
An additional advantage of this structure according to the invention is that the centre of gravity of the container can be very low, which can be important for instance when the container is used in hilly areas.
In order to prevent structural decomposition in for instance peat grassland, the contact pressure with the ground should be lower than 1 bar. With the structure according to the invention this requirement can easily be met.
In a specific embodiment the container has the special feature that the wheel has a form-retaining peripheral outer surface.
An alternative embodiment has the special feature that the wheel has an elastically deformable and thus compressible peripheral outer surface. As the elastic compressibility increases, the contact surface between the container and the ground will increase and the contact pressure will therefore decrease.
An adjustment means enables an adjustment of at least one support wheel positioned on the frame and/or the container which effectively prevents rocking of the container during transport.
In order to give the container embodied as a wheel a sufficiently large capacity, use can for instance be made in practice of an outer diameter of more than 2 meters. An advantage of such a large diameter is the small rolling resistance and the correspondingly small pulling or pushing force for rolling displacement of the container. An additional advantage of the rolling displacement is that the content of the container is continuously in movement and is mixed.
BRIEF DESCRIPTION OF THE DRAWINGS
Further features and details will be stated and elucidated with reference to the annexed drawings. Herein:
FIG. 1a shows a cross section through a substantially form-retaining container according to the invention;
FIG. 1b shows an axial side view thereof;
FIG. 2a shows partially in side view, partially in cross section a variant with a flexible peripheral element;
FIG. 2b shows an axial side view of the container;
FIG. 3a shows a view corresponding with FIG. 1a of an embodiment which takes a substantiall
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patent: 581416 (1897-04-01), Dunn
patent: 2548190 (1951-04-01), Arpin, Jr.
patent: 2593696 (1952-04-01), Pool
patent: 3905523 (1975-09-01), Ahlers et al.
patent: 4109865 (1978-08-01), Hurtado T et al.
patent: 4218015 (1980-08-01), Dean
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