Buckles – buttons – clasps – etc. – Buckles – Harness
Patent
1986-02-21
1988-07-05
Aschenbrenner, Peter A.
Buckles, buttons, clasps, etc.
Buckles
Harness
24198, 24200, 24487, A44B 1106
Patent
active
047545305
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a strap tensioning device of the kind with a spring-loaded clamping element which in its effective state presses a strap running through the tensioning device against a holding bar, with a friction effect.
It has been a constant aim in the development of tensioning devices of the above-mentioned kind to simplify them as far as possible in order to reduce material and other manufacturing costs as much as possible and thus also to lower the selling price. Hitherto, these tensioning devices have had a relatively complicated construction, consistently displaying a plurality of parts which have to be connected together during assembly.
The main object of the invention is to make significant progress towards the attainment of this goal, and to provide a tensioning device wherein the number of parts incorporated in the tensioning device is required to the absolute minimum.
This object is achieved with a tensioning device of the above-mentioned kind constructed according to the invention, which is essentially characterised in that it in constructed from a plate made of sprung material with cut-outs positioned so that both the holding bar and the clamping element and their mutual connecting parts are formed in one continuous piece from the plate which also forms the framework of the tensioning device, and wherein the clamping element is formed by a tongue cut and bent out of the plate and able to co-act with an abutment element which is able to rest against the planar face of the tongue and is stamped and bent out of the plate to form a pivot point for the tongue, the clamping element being so arranged that when a pinching effect is applied it rocks across the said abutment element and is forced to move away from the holding bar against the said spring effect, thereby releasing the strap.
With this construction the number of parts has been reduced to one single part, which is certainly absolutely the lowest number of parts which can be attained.
Some embodiment examples of the invention are described in the following with reference to the accompanying drawings, on which
FIG. 1 is a view of a blank for a first embodiment example of a strap tensioning device according to the invention,
FIG. 2 is a view of a finished tensioning device according to the same embodiment example shown in FIG. 1,
FIG. 3 is a section along the line III--III through the tensioning device shown in FIG. 2, with a strap inserted and locked therein,
FIG. 4 is a blank corresponding to that shown in FIG. 1 for a different embodiment according to the invention,
FIG. 5 is a view corresponding to FIG. 2, showing the tensioning device according to the latter version,
FIG. 6 is a section along the line VI--VI through the tensioning device shown in FIG. 5,
FIG. 7 is a view corresponding to FIGS. 1 and 4 of a blank for a tensioning device according to a third embodiment version,
FIG. 8 is a view corresponding to FIGS. 2 and 5 showing the last-named tensioning device, and
FIG. 9 is a section along the line IX--IX in FIG. 8 through the tensioning device shown in FIG. 8.
The blank shown in FIG. 1 for a tensioning device according to a first embodiment example consists of a plate, preferably made of a bend-resistant and sprung plate, especially steel plate. Naturally, it is also within the scope of the invention to chose another material, such as a plastic, for example, although steel plate has until now been found to be the most suitable material. In the blank there are three cut-outs 1, 2 and 3 respectively. The cut-out 1, which has a substantially rectangular shape, is formed with a flap 4 on one side. The cut-out 2 is also substantially rectangular and has a second flap 5 on one of its sides, while a third flap 6 extends out from that side of the cut-out 3 which is nearest to the cut-out 2. 7 is the designation of a tongue which is attached to the remaining material, i.e. with the base of the tongue attached to the side of the cut-out 3 which is opposite the edge with the flap 6. The free terminal edge of the tongue 7 has
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patent: 3249978 (1966-05-01), Shears
Aschenbrenner Peter A.
Cranmer Laurie K.
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