(19)
(11) EP 0 190 636 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.10.1986 Bulletin 1986/40

(43) Date of publication A2:
13.08.1986 Bulletin 1986/33

(21) Application number: 86101044

(22) Date of filing: 27.01.1986
(84) Designated Contracting States:
CH DE FR LI

(30) Priority: 04.02.1985 IT 8251085

(71) Applicant: OTLAV S.p.A.
 ()

(72) Inventor:
  • Manzalini, Norberto
     ()

   


(54) Method of manufacturing male elements for hinge devices and male elements obtained thereby


(57) The method of manufacturing sealed hollow male elements for hinge devices comprises the steps of shearing a segment off a drawn rod, and successively causing the material to flow laterally upwards such as by cold impact extrusion by means of a punch, to form a hollow body (5) of constant cross section having an open end. Thereafter, there is performed on said hollow body (5), as by impact with a die, a reduction of one portion at the open end (14), thus defining a hollow pin (8) having an open end (14). The latter is then stopped by press fitting a shaped body (13) thereinto.







Search report