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(11) | EP 2 180 096 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Box of intermediate plates having an elastic plate of adjustable elasticity |
| (57) Box of intermediate plates having an elastic plate of adjustable elasticity, composed
of an intermediate cap plate or cover (2), an intermediate protection plate or base
(3), and an adjustable intermediate elastic plate (4), placed between them with a
breathing zone (9) in its perimeter to allow an expansion. The cover (2) is provided
with flanges (5) to be fitted into some accommodations (6) disposed on the base (3),
and lugs (7) for the pre-assembly of the base plate. The cover (2) and the base (3)
have accommodations (8) and (11) to fix the elastic plate (4) with lugs (12). The
intermediate elastic plate (4) has hollows (13), wave shapes consisting of ridges
(14) and valleys (15), its perimeter zone (16) can be smooth or nonexistent, and its
lower face is provided with lightening cavities (17) in the shape of mounting holes.
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