Supports – Brackets – Specially mounted or attached
Patent
1983-09-28
1985-09-24
Machado, Reinaldo P.
Supports
Brackets
Specially mounted or attached
182121, E06C 716
Patent
active
045428743
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention relates to a bracket for mounting on a ladder as support for a work platform such as one or more planks. The bracket consists of an arm serving as a seat for the platform, a carrying bar adapted for suspension from one of the rungs of the ladder and engagement against a rung lower down on the ladder, and a strut arranged between the carrying bar and arm, for supporting the arm substantially horisontally oriented. The strut has hook means for optional coaction with one of a row of notches made along the carrying bar, the arm being connected to the carrying bar at a first joint and to the strut at a second joint.
Such a bracket is already known from the British Patent Specification No. 273 501. Similar to other brackets in the art for the same purpose, it is burdened with the disadvantage of being rather complicated and bulky as well as unhandy when it is collapsed as far as is possible. This latter drawback is very much of a disadvantage in storage and distribution in marketing the brackets as well as storing by the consumer.
The object of the invention is therefore to provide a simple bracket which requires small space in storage. It is also a prerequisite that the solution must offer at least the same safety as the brackets in the art.
The desired result is obtained by the bracket being given the characterizing features disclosed by the following claim 1.
An embodiment of the invention is described in detail in the following with reference to the accompanying drawing, on which
FIG. 1 is a perspective view of a bracket mounted on the front of a ladder for carrying one end of a working platform.
FIG. 2 is a partial side view seen in the direction of arrow II in FIG. 1.
FIG. 3 is a side view showing how the bracket is mounted on the underside of a ladder for carrying one end of a work platform.
FIG. 4 illustrates how the bracket only takes up a very small space when collapsed and in its packed condition.
As will be seen from FIGS. 1 and 3 the bracket is adapted for be mounting on a ladder 1, to serve as the support means for an unillustrated work platform, such as can consist of one or more planks. With the aid of two or more ladders and just as many brackets, such a platform can be supported at its ends and furthermore at other parts of it as well.
The bracket comprises an arm 2 serving as support for the platform, a carrying bar 3 adapted for being suspended from one of the rungs 4 of the ladder 1 and engagement against a rung 4 lower down the ladder, there being a strut 5 arranged between the carrying bar 3 and arm 2 for supporting the arm substantially horizontally.
The strut 5 has a hook means 6 for optional coaction with one of four notches in a row along the edge of the carrying bar 3 nearest the strut. These notches are at an angle, opening slopingly upwards, to keep the hook means 6 safely in place under the weight of the bracket, platform and platform load, when the means is put into one of the notches on placing the bracket on the ladder. The hook means 6 comprises a stud provided with a head, the stud itself fitting any one of the notches 7 while its head prevents movement of the stud in the longitudinal direction thereof and out of engagement with the notch.
The carrying bar 3 is made from a length of angle section which has one flange facing towards the rungs and its other flange outstanding and provided with the notches 7. At its upper end the bar has a hook 8 dimensioned to accommodate a rung 4 of conventional shape and dimension.
The arm 2 is similarly made from a length of angle section having a flange facing towards the outside face of the outstanding flange of the bar 3. The arm and bar are joined at a first joint 9 in the form of a permanently mounted riveted or welded bolt for example, rotatable in either or both parts and situated in juxtaposed end portions of the mutually engaging flanges. At its free end the arm 2 has an upstanding flap 10 as a stop for the platform.
The arm 2 is furthermore connected to the strut 5 at a second joint 11. This joint is forme
REFERENCES:
patent: 567755 (1896-09-01), Stillman
patent: 1216214 (1917-02-01), Connell
patent: 1462086 (1923-07-01), Echlin
patent: 1474289 (1923-11-01), Reimann
patent: 1497120 (1924-06-01), Riker
patent: 2665952 (1954-01-01), Edwards
patent: 2910135 (1959-10-01), Moore
patent: 3966340 (1976-06-01), Morris
Chin-Shue Alvin
Machado Reinaldo P.
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