(19)
(11) EP 0 884 139 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.06.1999 Bulletin 1999/25

(43) Date of publication A2:
16.12.1998 Bulletin 1998/51

(21) Application number: 98110511.7

(22) Date of filing: 09.06.1998
(51) International Patent Classification (IPC)6: B25D 17/11
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 12.06.1997 IT MO970109

(71) Applicant: Socomec - Societa' Costruzioni Meccaniche Societa' per Azioni
43014 Medesano, Parma (IT)

(72) Inventor:
  • Gazza, Nello
    43100 Parma (IT)

(74) Representative: Modiano, Guido, Dr.-Ing. et al
Modiano Gardi Patents, Via Meravigli, 16
20123 Milano
20123 Milano (IT)

   


(54) Oleohydraulic demolition hammer


(57) The hammer is meant to reduce the noise pollution produced by the vibrations generated by the work of the tool (5). This is achieved by hot-pouring a polyurethane substance (13) between coaxial walls (10, 11) of the casing (7). The substance tensions the walls and thus reduces the vibrations emitted by the casing. The hammer is used in rock and building demolition machines.






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