(19)
(11) EP 0 454 375 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.06.1992 Bulletin 1992/23

(43) Date of publication A2:
30.10.1991 Bulletin 1991/44

(21) Application number: 91303523.4

(22) Date of filing: 19.04.1991
(51) International Patent Classification (IPC)5: B25B 23/06, B25B 23/04
(84) Designated Contracting States:
DE ES FR GB IT SE

(30) Priority: 27.04.1990 DE 4013638

(71) Applicant: EMHART INC.
Newark, Delaware 19711 (US)

(72) Inventors:
  • Wetzel, Matthias
    D-6000 Frankfurt/Main 1 (DE)
  • Honold, Achim
    W-7601 Ordenberg (DE)
  • Wirth, Christoph
    D-6251 Selters 1 (DE)

(74) Representative: Stagg, Diana Christine et al
Emhart Patents Department Emhart International Ltd. 177 Walsall Road
Birmingham B42 1BP
Birmingham B42 1BP (GB)


(56) References cited: : 
   
       


    (54) Screwing device


    (57) A screwing device with which fixing elements having a respective generated surface, in particular polygonal nuts, can be screwed onto studs. The screwing device can be driven electrically or pneumatically and comprises an exchangeable magazine (4) which is provided in the screw axis and from which the individual nuts can be brought to a work station by means of a tool in the form of three arms (3). In this position, the polygonal nut (1) and tool are positively fixed before the rotational movement is transmitted. The force is transmitted from the motor (49) via a driving unit to the lifting cylinder (14) and to the mouth-piece (2) fixed thereon.






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