Automatically self-steering plow/harrow combination with release and reset mechanism connecting harrow to plow
OwnerLars-Eric Jacobssoninventor
Life of this patent
Estimating the term…
Abstract
A plow/harrow combination comprising a harrow member extending sidewardly from a plow blade, the harrow teeth having an elongated cross section with the cross-sectional length axis inclined in relationship to the direction of travel, thus creating a compensating force on the plow blade, the combination also including a release and reset mechanism, which, when the harrow member is obstructed by an object creating a load exceeding a predetermined level, causes the release of the harrow member from the original position and a pivoting movement of same in a substantially horizontal plane, the harrow member being automatically returned to the original position as soon as the load on the harrow member no longer exceeds the predetermined load.
Claims6
A self-steering plow/harrow combination comprising:
- a plow blade;
- a longitudinally extending base structure;
- a number of harrow teeth attached to the base structure and spaced from each other and each directed downwardly towards the ground plane, the harrow teeth having a mainly rectangular cross section with the cross-sectional length axis inclined in relation to the direction of travel for the harrow teeth;
- the base structure being attached to the plow blade by pivot means restricting movement of said base structure to movement about a vertical pivot, whereby the base structure is movable in a horizontal plane substantially parallel to the ground plane, said base structure being attached to the plow blade in such a way, that the base structure together with the harrow teeth creates a force opposed to the friction force acting on the plow blade;
- a release mechanism attached to the plow blade and having means to engage the base structure, the engagement means releasing the base structure for movement in said horizontal plane at a predetermined load;
- and a reset means attached to the plow blade and the base structure to return the base structure to its original position when the predetermined load is no longer exceeded.
Dependencies are inferred from the claim text.