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Threaded flexible guide tube for endoscope

  • US 5,261,391 A
  • Filed: 07/31/1992
  • Issued: 11/16/1993
  • Est. Priority Date: 08/23/1991
  • Status: Expired due to Fees
First Claim
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1. An endoscope comprising:

  • (a) a body having an inlet port;

    (b) an insertion tube extending from said body;

    (c) a rigid tip member mounted on a distal end of said insertion tube, said tip member having an outlet port;

    (d) a flexible guide tube received in said body and said insertion tube to connect said inlet port of said body to said outlet port of said tip member, an inner diameter of said guide tube being greater than an inner diameter of said outlet port, and internal threads being formed on an inner periphery of a front end portion of said guide tube; and

    (e) a tubular connection portion extending from a rear end face of said tip member, said connection portion having a communication passage through which said outlet port is communicated with said guide tube, external threads being formed on an outer periphery of said connection portion, and said external threads being threadedly engaged with said internal threads on said guide tube to connect the front end portion of said guide tube to the outer periphery of said connection portion, said endoscope further comprisinga connection pipe which is separate form said tip member and has a through hole, said tip member having a mounting hole, said connection pipe being fixed to said tip member in such a manner that a front end portion of said connection pipe is inserted in said mounting hole in said tip member, a rear end portion of said connection pipe being projected from the rear end face of said tip member to serve as said connection portion for connecting said guide tube thereto, and at least a rear end portion of said through hole serving as said communication passage, and whereinthe rear end portion of said connection pipe serving as said connection portion for said guide tube is greater in diameter than the front end portion of said connection pipe inserted in said mounting hole in said tip member.

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