(19)
(11) EP 0 159 272 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.10.1987 Bulletin 1987/42

(43) Date of publication A2:
23.10.1985 Bulletin 1985/43

(21) Application number: 85400737

(22) Date of filing: 15.04.1985
(84) Designated Contracting States:
DE FR GB

(30) Priority: 16.04.1984 JP 7494084

(71) Applicant: MATSUDA, Shinichi
 ()

(72) Inventor:
  • MATSUDA, Shinichi
     ()

   


(54) Cleaning apparatus for pipes


(57) A cleaning apparatus for a pipe (9) which comprises a scratching device (10) having a plurality of scratching segments being radially elongated and being disposed around the axis of the scratching device (10) so as to contact elastically and annularly to the interior surface of the pipe (90) as a whole at scratching portions (16) formed at outer peripheries thereof, and driving means (25) for moving the scratching device (10) in the pipe (90). The apparatus may have a grinding device (37) which is connected to the scratching device (10) at back position thereof and has an injection pipe (46) for injecting mixed flow (95) of compressed air and abrasive material from at least one nozzle formed at the outer end of a radially elongated portion of the injection pipe (46), and a rotating means (51) of the injection pipe (46).






Search report