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Sample sucking pipe and method for manufacturing same

  • US 5,969,272 A
  • Filed: 03/14/1997
  • Issued: 10/19/1999
  • Est. Priority Date: 03/14/1996
  • Status: Expired due to Term
First Claim
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1. A sample sucking pipe structure adapted to pierce through a cap of a sample vessel both to vent the vessel and to suck a portion of a sample in the vessel the sucking structure comprising:

  • a first metal pipe for sucking having a closed portion at a tip end of its pipe passageway and a non-closed portion of its pipe passageway serving as a sample passageway and having in its wall a side-facing sucking opening communicating with the sample passageway;

    a second metal pipe for venting having a closed portion at a tip end of its pipe passageway and a non-closed portion of its pipe passageway serving as a venting passageway and having in its wall a side-facing venting opening communicating with the venting passageway;

    the first and second pipes disposed parallel to and in contact with each other and bonded together to form an integrated pipe unit, and having diagonal cut surfaces formed at a tip end of the integrated pipe for piercing the vessel cap; and

    each of the sucking opening and the venting opening disposed in a location shifted from a generatrix of the associated pipe extending from an end of the major axis of the diagonal cut surface of the associated pipe.

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