Work holders – Relatively movable jaws – With means to bias jaw toward nonholding position
Patent
1988-11-08
1990-04-03
Watson, Robert C.
Work holders
Relatively movable jaws
With means to bias jaw toward nonholding position
269238, 269287, 269296, 269268, B23Q 300
Patent
active
049134124
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to racks, i.e. devices for positioning and holding oblong bodies such as logs of wood, sticks, etc., e.g. for the purpose of subjecting them to transformations which, in the case of logs may be cutting, and in the case of sticks may be bundling to make up faggots.
Racks are already known for positioning and holding logs for the purpose of cutting them. Such "sawhorses" are essentially constituted by substantially plane rectangular supports which are associated to form an X-shaped part with one end of each of its pairs of arms constituting a stand for positioning the rack on the ground, and with the opposite end constituting a fork for holding oblong bodies. In some cases, the two arms of the X-shape may pivot relative to each other in order to allow the rack to be folded away when not in use, thus reducing its size for storage purposes.
Such racks fulfill the function for which they were designed. However, they suffer from various drawbacks which may give rise to accidents. With such a rack, it is relatively difficult to cut up a log while holding the log properly in the V-shaped fork and simultaneously ensuring that the rack is kept stable. Further, racks are not well designed for making up faggots, in particular when a bundle of sticks is to be made up and bound together.
The object of the present invention is to mitigate these drawbacks by providing a rack suitable for positioning and holding the oblong bodies which it is intended to receive, which is very stable without requiring fixing to the ground, and which also makes it very easy to make up bundles such as faggots of sticks.
More precisely, the present invention provides a rack, in particular for making up faggots, cutting logs, etc., characterized by the fact that it comprises:
a stand defining a supporting polygon suitable for taking position on the ground;
a riser fixed to said stand and occupying a plane substantially perpendicular thereto, said riser being situated substantially on one side of said stand;
a first jaw, said first jaw being substantially in the form of a concave cylinder, with its concave side facing out from a vertical volume extending over said stand and passing through said riser;
means for mounting said first jaw on said riser;
a second jaw, said second jaw being substantially in the form of a concave cylinder;
means for mounting said second jaw to rotate about an axis relative to said first jaw such that said axis of rotation lies substantially in the intersection between the two cylindrical surfaces of each of said jaws, and that the two jaws occupy positions relative to each other such that their concave faces face each other; and
a lever fixed to said second jaw, in such a manner as to be contained within said vertical volume.
Other characteristics and advantages of the present invention appear from the following description of a nonlimiting example given with reference to the accompanying drawings, in which:
FIG. 1 is a perspective view of an advantageous embodiment of a rack in accordance with the invention;
FIG. 2 is a side view of the FIG. 1 rack, showing how such a rack can be used as a sawhouse, and also showing the advantages it provides over prior art sawhouses; and
FIG. 3 is a partially cut-away side view of a different advantageous embodiment of a rack in accordance with the invention.
The rack shown in FIG. 1 comprises a stand 1 constituted by a base 2 made up of tubes 3, 4, . . . which are assembled to one another so as to form a supporting polygon 5 of given area which, in the embodiment shown, is a rectangular area. A riser 7 is fixed on one side 6 of the base 2 and is constituted by a tubular frame 8. This frame is substantially one meter high, but this value is given merely by way of example since it may vary for each utilization or application for which such a rack may be intended.
A first jaw 10 is fixed to the top bar 9 of the riser 7, said jaw advantageously following the shape of a substantially cylindrical surface 11 whose concave side 12 faces out 13 from the vertical
REFERENCES:
patent: 167667 (1875-09-01), Hollingsworth
patent: 173726 (1876-02-01), Huntington
patent: 1135815 (1915-04-01), King
patent: 1877768 (1932-09-01), Koester
patent: 2428185 (1947-09-01), Wallace
patent: 2491972 (1949-12-01), Halate
patent: 4072303 (1978-02-01), Szabo
patent: 4457504 (1984-07-01), Mottla
patent: 4566559 (1986-01-01), Van Asten
patent: 4678170 (1987-07-01), Sampson
patent: 4718652 (1988-01-01), Liebenstein
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