Earth working – With drive means for tool or cleaner – Simultaneously reciprocating and oscillating blade having...
Patent
1991-08-07
1993-03-16
Taylor, Dennis L.
Earth working
With drive means for tool or cleaner
Simultaneously reciprocating and oscillating blade having...
172 91, 172 96, A01B 4502
Patent
active
051936240
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention is concerned with a device for loosening sub-soil. There are known a number of devices which by means of tools pierce openings into the soil either for the purpose of making grooves for putting in seeds or for the ventilation and/or drainage of the soil etc. Especially for the latter-mentioned purpose the opening produced on the surface of the soil by piercing in the tool and remaining after its removal is to stay small whereas in the deeper area of the soil a more extensive movement of the tool is to be produced transversely to the piercing or digging direction.
It is basically known to pivotably support such piercing tools on a controllable tool carrier on a vertical plane extending in the travelling direction and to move them under the action of spring force against a stop which ensures that the piercing tool prior to being pierced into the soil has a certain orientation thereto which at least approximately agrees particularly with the pressure load direction at the time of penetrating into the soil. The piercing of the tools into the soil takes place with the device being moved in the travelling direction by which travelling movement the tool, which has penetrated the soil, is pivoted in a certain manner, however, not to such an extent that any tearing-up movement takes place on the surface of soil on removing the tool. The small displacement in the soil out of the orientation position predetermined by the stop the tool carries out against the force of the above-mentioned spring. After the tool has left the soil it is again moved under the force of the said spring against the stop and thereby pivoted towards the orientation direction provided for the repeated penetration of the soil. The operation of such tools or arrays of tools takes place in a manner known per se with the aid of a crank mechanism which is operated in the course of the travelling movement corresponding to the desired density of penetration.
SUMMARY OF THE INVENTION
The invention is based on the object of guiding the tools of such a device in a steered manner such that their orientation prior to the penetration of the soil is as far as possible independent from the differently adjustable penetration depth respectively provided. Such a determination of the penetration depth can be realized in a very simple manner by a height-displaced adjustability between a roller feeler and/or castor wheel and the chassis of the device.
For the solution of this object according to the invention the tool is supported on steering rods which upon the orientation of the tool to its piercing-in position, i.e. under a spring-loaded abutment against the stop, at least approximately form a jointed-rod parallelogram. There are comprised by this jointed-rod parallelogram the chassis part between two chassis-mounted bearings, parallel and opposite thereto a connecting lever between a coupling point of the tool and a guide lever as well as an working lever between one of the chassis-mounted bearings and the pivot bearing of the piercing tool, respectively its holder, and parallel and opposite thereto the said guide lever. This parallelogram ensures that the orientation of the tool is maintained independently from the adjusted penetration depth so that any adjustment or setting of the stop responsive to the penetration depth is not necessary. Accordingly, the adjustability of the stop is necessary only for the determination of the desired tool orientation per se.
BRIEF DESCRIPTION OF THE DRAWINGS
Preferred embodiments of the invention are now described by way of the drawings wherein it is shown in:
FIG. 1
A side view of the device in a first preferred embodiment.
FIG. 2
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The device, as a whole designated by reference numeral 1, shows at position 2 connections which symbolically represent the mountability of the device on a tractor or similar self-powered vehicle. On the chassis 3 (which is only schematically shown) of the device there is by means of a hand-operated spindl
REFERENCES:
patent: 962520 (1910-06-01), Nielsen
patent: 994321 (1911-06-01), Klaus
patent: 1569070 (1926-01-01), Cain
Fogiel Max
Taylor Dennis L.
Thompson Jeffrey L.
Wiedenmann GmbH
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