Earth working – With drive means for tool or cleaner – Vibrating tool
Patent
1994-03-03
1995-07-18
Taylor, Dennis L.
Earth working
With drive means for tool or cleaner
Vibrating tool
111200, 405182, A01B 3500
Patent
active
054332770
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention concerns implements for use in the soil typically for trenching, slitting, mole ploughing, cable laying and subsoil cultivation although the apparatus to be described is not limited to these particular applications.
BACKGROUND OF THE INVENTION
It is known to penetrate the soil using a blade extending downwardly from a carriage which may be self propelled or trailed behind a tractor or similar vehicle. By arranging for the blade to penetrate the soil to a given depth so a slit or trench the width of which is determined by the thickness of the blade can be formed and it is known to backfill the trench with sand or gravel for drainage purposes or to discharge a cable or pipe at a low level in the trench with or without back filling to perform so-called trenchless cable or pipe laying.
It is an object of the present invention to provide an improved slitting or trenching tool and method.
It is another object of the invention to provide an implement which includes an improved slitting or trenching tool and further provides for back filling a slit or trench formed by the tool, and method of performing same.
It is another object of the invention to provide an improved pipe or cable laying apparatus utilising an improved slitting or trenching tool, and method therefor.
It is a further object of the invention to provide a subsoil cultivator which operates in conjunction with an improved slitting or trenching tool.
SUMMARY OF THE INVENTION
According to one aspect of the present invention an improved slitting or trenching tool comprises a blade adapted to be lowered vertically into the soil and pulled therethrough so as to define a slit or trench having a depth determined by the mean depth to which the tool penetrates the soil, characterised by vibrator means adapted to cause the tool to vibrate at least in a generally up and down vertical manner at the same time as the tool is pulled in a forward direction to form the trench or slit.
The amplitude of the vibration is typically small as compared with the mean depth of penetration.
The tool may be directly or indirectly attached to a vibrator drive unit and the latter may be mounted on or suspended from a carriage or frame by means of one or more shock absorbers to reduce the transmission of vibration to the carriage or frame. Where the tool is mounted on a carriage, the latter may be self propelled or adapted to be trailed by a powered vehicle and where the tool is attached to a frame, the latter may be adapted to be attached to a three point linkage on the rear of a tractor or similar land vehicle or adapted to be mounted on the rear of a carriage which itself may be self propelled or adapted to be trailed.
According to a preferred aspect of the invention, a second tool is provided, which is adapted to be lowered into the soil either with or after the vibrating tool has penetrated to its working depth, the second tool being adapted to enter the trench or slit formed by the first tool and to follow the latter in the direction of its forward movement, characterised in that the second tool is also caused to vibrate that in a direction generally perpendicular to the direction of vibration of the first tool.
Whilst the first tool can therefore be thought of as vibrating in a generally vertical manner, the second tool can be thought of as vibrating in a generally horizontal manner.
Typically the second tool is caused to vibrate in a direction generally parallel to the forward direction of movement of the said first tool.
Although horizontal and vertical have been used to describe the general directions of oscillation of the tools, it is to be understood that the terms are intended to be descriptive not definitive. In particular the horizontal motion of the following second tool may be achieved by mounting the second tool at the lower end of a relatively long arm, the upper end of which is pivotally joined to the carriage or frame carrying the first tool and the generally horizontal oscillation of the second tool may be achieved
REFERENCES:
patent: 2704499 (1955-03-01), Radway
patent: 3670512 (1972-06-01), Grazier et al.
patent: 3726099 (1973-04-01), Ruge
patent: 3908292 (1975-09-01), Harris
patent: 3926004 (1975-12-01), Baylor
patent: 4079593 (1978-03-01), Flippin
patent: 4355475 (1982-10-01), Harkness
patent: 4832531 (1989-05-01), Pavlovits
patent: 4867606 (1989-09-01), Wright
patent: 4867607 (1989-09-01), Johnson et al.
patent: 5303663 (1994-04-01), Salestrom
Pezzuto Robert
Taylor Dennis L.
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