(19)
(11) EP 0 244 758 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.02.1988 Bulletin 1988/08

(43) Date of publication A2:
11.11.1987 Bulletin 1987/46

(21) Application number: 87106261

(22) Date of filing: 29.04.1987
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 02.05.1986 JP 10229686

(71) Applicants:
  • SUMITOMO ELECTRIC INDUSTRIES LIMITED
     ()
  • Elspan International Limited
     ()

(72) Inventors:
  • Yamada, Masato c/o Itami Works of Sumitomo
     ()
  • Usui, Susumu c/o Itami Works of Sumitomo
     ()
  • Ellen, Peter Edginton
     ()

   


(54) Steel bar for concrete constructions


(57) The invention refers to a deformed steel bar (32, 33, 40, 50) for concrete constructions. To improve the adhesion between the steel bar and the concrete the steel bar has a longitudinal sectional profile which varies alternately and smoothly with a peak (a1, 3A, 51) and a valley (a2, 52) in the axial direction thereof.






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