Earth working – Lawn aerator or perforator – or plug remover
Patent
1994-10-03
1996-04-23
Arola, Dave W.
Earth working
Lawn aerator or perforator, or plug remover
A01B 4502
Patent
active
055094872
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
This invention relates to coring apparatus for treatment of soil and has particular relevance for treatment of soil in which turf or special grasses are cultivated whereby good surface conditions of aeration and drainage are required. This applies particularly to conditioning of grass or lawn used in bowling greens, tennis courts, golf courses inclusive of fairways and more particularly greens and applications of a similar nature.
In this regard it has to be borne in mind that the surface of cultivated grass or turf areas such as golf greens and bowling greens are subjected to excessive traffic by both people and machines for mowing, rolling and coring and the like and compaction of the top layer of the turf results from such activity as well as formation of a scum or thatch from the deposit of fine material from various sources. This condition has to be treated by coring or drilling through the top layer.
BACKGROUND ART
Conventional coring apparatus or machines comprise a manually operated machine having a plurality of cores which undergo vertical reciprocatory non rotary motion which are operated from a belt drive from a motor mounted on the machine. However, this conventional coring machine was disadvantageous in that it had to be manually moved over the surface of the turf and also by using static or non rotating cores such cores exerted a dragging effect or lateral movement on the turf which had a tendency to tear or rip at the turf.
BROAD STATEMENT OF INVENTION
It therefore is an object of the invention to provide coring apparatus which may reduce the disadvantages applicable to the prior art referred to above.
The coring apparatus includes members for coring a ground surface; vertically reciprocatory movement thereof from an operative position when the ground surface is penetrated by the drilling members to an inoperative position when the drilling members are clear of the ground surface; engaging wheels with a movable frame component being pivotally attached to said mobile chassis frame adjacent one end thereof and being slidably attached to said axle adjacent another end thereof whereby said movable frame component is caused to move in a reciprocatable fashion in a substantially horizontal plane relative to said mobile chassis frame; and being spaced from the drilling members and which foot means contacts the ground surface when the drilling members are in the operative position.
The chassis frame may be of any suitable construction. More suitably the chassis frame is pivotally movable relative to the ground engaging wheels. Suitably the chassis frame includes one or more longitudinal frame members which may be interconnected by one or more cross members or transverse frame members.
The coring support suitably is rigidly attached or integral with the chassis frame and may comprise a coring support plate or head which may support one or more spaced rows of drill members.
The means for causing the rotating movement of the drill members may comprise a plurality of sprockets or pulleys mounted on the coring head which are all rotated by a suitable drive means supported on the chassis frame. There also may be provided a plurality of idlers wherein the sprockets and idlers are all interconnected by an endless drive chain or belt.
The drive means may comprise a drive motor and a belt drive for driving the sprockets or pulleys mounted on the coring head. Suitably the drive motor is coupled by clutch means to the belt drive for uncoupling of the drive motor and the belt drive when required. The belt drive may include one or more pulleys supported on the chassis frame.
Preferably the foot means may advance the chassis frame along the ground when the drilling members are in the inoperative position so that the chassis frame in one embodiment of the invention may be self propelled as described hereinafter.
The foot means in this particular embodiment may move from an initial ground contact position to a second ground contact position in a walking action. When the foot means is in the
REFERENCES:
patent: 2730028 (1956-01-01), Oswalt
patent: 2918130 (1959-12-01), Thom
patent: 3015364 (1962-01-01), Fitzgerald
patent: 4476938 (1984-10-01), McKay
patent: 4753298 (1988-06-01), Hansen et al.
"Mutt and Jeff" Comic Strip By Bud Fisher, Washington Evening Star, Aug. 24, 1952.
Dufty Raymond J.
Kaye Ronald S.
Arola Dave W.
Novosad Christopher J.
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