(19)
(11) EP 0 362 158 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.04.1991 Bulletin 1991/14

(43) Date of publication A2:
04.04.1990 Bulletin 1990/14

(21) Application number: 89830412.6

(22) Date of filing: 25.09.1989
(51) International Patent Classification (IPC)5: E21B 7/24, E21B 7/20
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR LI LU NL SE

(30) Priority: 29.09.1988 IT 62988

(71) Applicant: TRIVELSONDA di ARMANDO TONTI & C. S.n.c.
I-60027 Osimo (AN) (IT)

(72) Inventors:
  • Tonti, Armando
    Osimo (AN) (IT)
  • Tonti, Silvio
    Osimo (AN) (IT)

(74) Representative: Baldi, Claudio 
Piazza Ghislieri, 3
60035 Jesi (Ancona)
60035 Jesi (Ancona) (IT)


(56) References cited: : 
   
       


    (54) Vibrator for installing on drilling machine "rotaries"


    (57) This invention concerns a vibrator for installing directly under the "rotary" of drilling machines. The actual vibrator is fitted in a casing (5) with a vertical through hole at the centre (4a), and closed at the bottom by a plate (4) which supports a double vice (1) and at the top by a counter-plate (6) joined elastically, by an annular series of shock absorbers (10), to an overlying platform (7) which is anchored firmly to the flange of the "rotary" by means of support and fixing U-bolts.






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