Hand hydraulic pipe expander

Hand hydraulic pipe expander

  • CN 2,671,753 Y
  • Filed: 01/17/2004
  • Issued: 01/19/2005
  • Est. Priority Date: 01/17/2004
  • Status: Active Grant
First Claim
Patent Images

1. , a kind of hand-hydraulic pipe-expander, comprise hand pump, wind (2), oil drum (3) and be fixed on handle (1) on the oil drum (3), it is characterized in that:

  • described hand pump is provided with the piston cylinder (33) that communicates with oil-out, be provided with piston (17) in the piston cylinder (33), piston (17) is provided with return spring (18), the end face of piston (17) is provided with taper thimble (19), piston (17) is outer to be provided with and the fixing piston bush (8) of the pump housing (7), be fixed with the head (10) that rises on the piston bush (8), taper thimble (19) is complementary with the head (10) that rises.

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