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. PATENT: HIGH ELASTICITY PLASTIC SPRING Filed in Italy on 04/01/2007, N° TO2007A 000006 vittorio.scialla@strumentiperleaziende.com |
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Said elements (1, 2), under the effect of an applied torque, can rotate with respect to each other, around a film hinge (3) and, in their rotation, undergo a deformation, since their linked edges (4, 5) are compelled, by the film hinge (3) linking them, to keep their profiles aligned to each other; the elastic deformation of the profiles (4,5) of said elements (1, 2) gives rise to an accumulation or a release of energy, which determines the elastic response of the spring at the variation of the relative angle between said two elements (1, 2). Said spring may eventually be integrated with another plastic element and may be manufactured in the same injection moulding operation. FEATURES The wide relative rotation of the two plates around the film hinge, is transformed into a much smaller flexure of said plates, which keeps itself within the range of elastic deformation. While the two plates, elastically, try to restore their original curved profile, they try to restore their original alignment to each other, too. Experimental decay tests showed that a pre-loaded spring keeps oper time 40% of its initial load, making it suited to applications wherein it is required to be pre-loaded, and then is further flexed momentarily, like in handles of doors or in electrical pushbuttons. Experimental duration tests showed that the spring is suited to applications wherein resistance to a large number of flexures is required.. APPLICATIONS
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