Cutting – Rotatable disc tool pair or tool and carrier – Carrier for rotatable tool movable during cutting
Patent
1996-09-20
1998-10-13
Jones, Eugenia
Cutting
Rotatable disc tool pair or tool and carrier
Carrier for rotatable tool movable during cutting
83485, 8350812, 83574, 83859, 1442861, 144376, B27B 700
Patent
active
058196269
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a portable sawmill with improved lateral and longitudinal stability
BACKGROUND OF THE INVENTION
A timber sawing device comprising a single circular sawblade, which pivots through 90.degree. to act in both the horizontal and vertical planes, is known. As is known, this sawblade is mounted together with an engine on a laterally movable carriage which in turn is mounted on a longitudinally movable cross-bed which may travel along two rails between which the operator has access. Again, as is known, these rails have been mounted on end frames located in a predetermined position and the rails have been manually and independently raised and lowered at the two support points on each end frame.
One object of the invention is to provide a portable sawmill having improved stability of the frame.
Another object of the invention is to provide a portable sawmill with improved operation and stability of the saw means, ease of erection, assembly and operation, for example, by a single operator even in rough conditions.
BRIEF SUMMARY OF THE INVENTION
Broadly in one aspect of the invention there is provided a portable sawmill with lateral and longitudinal stability which comprises: frame means; second end frame means; means connected to said bracket means for adjustably moving said rails in unison between upper and lower positions on the end frame means and for retaining said rails in an adjusted position; and carriage means engageable with said rails and longitudinally movable thereon.
Preferably, brace means are connected to an upper region of one or both vertical members of the end frames, the means of connection is such that each brace means may be altered in attitude with respect to its respective vertical member to provide lateral support to the sawmill or to align the sawmill with a log, the brace means being adjustable in length.
In a preferred form each bracket comprises: to be moved up and down the vertical member.
The sawmill further includes a rail supporting means comprising: and movable therealong, sawmill may be supported.
The sawmill preferably further includes a drive means which comprises: possible to the axis through which a sawblade forming part of the sawmill pivots.
Still further, the sawmill includes movement control means which comprises: to a second elbowed position through a position in which the strut is straight, pivot point, then rotates it through center whereby the saw means may take up two stable positions at right angles to each other and travel speed of the strut is hydraulically controlled between the two stable positions.
According to a second broad aspect, there is provided a portable sawmill including: comprising two horizontal and two vertical members; each rail being slidably connected by means of a bracket to respective of said vertical members of the first and second end frames; second ones of said vertical members; second ones of said uppermost horizontal member; winding means and the respective idler wheel in such a manner that positive up-and-down movement in unison of the rails at each end frame is achieved to adjust and retain in an adjusted position the rails at each end frame; and with said rails.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following more detailed description of one embodiment of the invention, reference will be made to the accompanying drawings in which:
FIG. 1 is an isometric view from one side of the framework in the set-up position;
FIG. 2 is a similar view to FIG. 1 but refers to the operating position with rails added and brace means turned 90.degree.;
FIG. 3 is a similar view to FIG. 2 with the addition of a support means for an engine and saw means;
FIG. 4 is a similar view to FIG. 3 with the addition of the engine and saw means;
FIG. 5 is a front view of an end frame showing the position of winding means;
FIG. 6 is a side view of the end frame of FIG. 5;
FIG. 7 is a top view of the support means together with the saw means and engine;
FIGS. 8 and 9 are successive end views of the saw means and e
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Goldberg Richard M.
Jones Eugenia
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