(19)
(11) EP 0 634 540 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.05.1995 Bulletin 1995/20

(43) Date of publication A2:
18.01.1995 Bulletin 1995/03

(21) Application number: 94830184.1

(22) Date of filing: 19.04.1994
(51) International Patent Classification (IPC)6: E04F 15/024, E04B 1/344, E04B 9/14
(84) Designated Contracting States:
CH DE ES FR GB IT LI

(30) Priority: 22.04.1993 IT BO930087 U

(71) Applicant: Ferri, Stefano
I-40138 Bologna (IT)

(72) Inventors:
  • Ferri, Stefano
    I-40138 Bologna (IT)
  • Folli, Alessandro
    I-40125 Bologna (IT)

(74) Representative: Lanzoni, Luciano 
c/o BUGNION S.p.A. Via dei Mille, 19
40121 Bologna
40121 Bologna (IT)


(56) References cited: : 
   
       


    (54) A variable-mass frame for flat structures


    (57) The variable-mass frame for flat structures has a knot element (1) utilizing four arms (2) serially hinged one to another by interaction of respective crown wheels (22) exhibited by the arms (2) at one end (21), at which one end (21) the arms (2) are constrained one to another by a plate (3) exhibiting four pivots (31) defining four rotation axes (A1, A2, A3, A4) for the crown wheels (22); the surface mass of the knot element (1) being varied by nearing or distancing free ends (23) of the arms, which free ends (23) are opposite to said first ends (21).






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