Excavating – Peat excavators
Patent
1989-08-04
1990-12-04
Taylor, Dennis L.
Excavating
Peat excavators
37 86, 37191A, E02F 506
Patent
active
049743481
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to an attachment that may be mounted on the boom of earthworking apparatus, in particular to a chain digger attachment.
BACKGROUND OF THE INVENTION
Booms are commonly mounted off tractors and special purpose vehicles by which hoes, and other attachments, may be supported for earthworking operations. The now common back hoe is one such piece of equipment on which a variety of work heads may be interchanged so as to increase the versatility of the apparatus.
It is an object of the present invention to further develop the versatility of equipment of the type set out above by provision of a workhead that performs the functions of a chain digger. Other objects, and various advantages, of the present invention will hereinafter become apparent.
STATEMENT OF THE INVENTION
The invention achieves its object by provision of a chain digger attachment for a boom mounted operation characterised in that there is provided:
a support frame for passage of a digging chain thereabout, the chain being passed over guide means therefor mounted on the support frame;
a disconnectable coupling means on the support frame whereby the support frame may be coupled to an articulated boom;
a source of motive power mounted on the frame and drivingly connected to one of the guide means, the source of motive power being activated by a pressurised fluid;
coupling lines for pressurised fluid to the source of motive power and provided with disconnectable connection means whereby the lines to the power source may be broken to enable dismounting of the attachment, and at least one ground engaging projection mounted on the support frame and providing a footing against which the boom may be actioned to push the support vehicle forward of a trench being formed by the attachment.
DESCRIPTION OF THE DRAWINGS
The invention will now be described with reference to a preferred embodiment as shown in the accompanying drawings wherein:
FIG. 1 is a side elevation of the rear end of a back hoe boom with a chain digger attachment in accordance with the present invention;
FIG. 2 shows how the attachment of FIG. 1 may be tucked in across the rear of the support vehicle;
FIG. 3 shows the attachment of FIGS. 1 and 2 in various dispositions;
FIG. 4 is a detailed view of the mounting end of the attachment;
FIGS. 5 and 6 show a drive sprocket and hub therefor;
FIG. 7 shows how a pusher foot may be mounted to the attachment of FIGS. 1 and 2;
FIGS. 8 and 9 are respectively elevation and plan views of a alternate form of attachment in accordance with the inVention;
FIGS. 10, 11 and 12 are plan, side and elevations respectively of a plan means for use in the device of FIGS. 8 and 9.
DESCRIPTION OF PREFERRED EMBODIMENTS
In FIG. 1, a chain digger attachment 10 is mounted to a back hoe style boom 11 at the rear 12 of a support vehicle, not shown. The chain digger attachment is disconnectably coupled at 13 to boom 11. The chain digger attachment is built upon a support frame 14 having disconnectable coupling at end 15 to which a motor 16 is mounted with a driving sprocket (not shown) engaged with chain 17 having digging means such as 18 attached thereto. The digging chain 17 is passed around sprockets 19, 20 and 21 which are supported upon the support frame 14.
In FIG. 3, the chain digger attachment is shown in two positions, an extended position 22 (shown in phantom form) and a trenching position 23. A ram 24 controls the angle of the attachment 10 through linkages at 25. In trenching, material brought to the surface is spread sideways by action of an auger on the axis of, and driven by, sprocket 20 (see FIG. 4). The motor 16 may be hydraulic and can be supplied by lines that are disconnectably connected thereto. The sprocket 19 may be mounted upon an extensible end 16 of support frame 14 to enable lengthening of the support frame to enable tensioning of the digger chain. A guard bar 27 is mounted at 28 to the coupling end of frame 14.
In FIG. 4 support frame 14 is joined to a yoke 15 on support arms 25 and 26 ther
REFERENCES:
patent: 3266179 (1966-08-01), Golden
patent: 3834049 (1974-09-01), Bond
patent: 3991494 (1976-11-01), Schuermann et al.
patent: 4483084 (1984-11-01), Caldwell et al.
patent: 4861199 (1989-08-01), Hackmack
McBee J. Russell
Taylor Dennis L.
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