Endoscopic flexible tube
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United States of America Patent
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-
Jun 28, 1988
Grant Date -
N/A
app pub date -
Dec 4, 1986
filing date -
Dec 13, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is a construction of a flexible tube, which is applied to an insertion section of an endoscope, adapted to be inserted into the body cavity. The flexible tube comprises a spiral tube formed by transforming a belt-shaped metal member into a spiral, a braid formed of fibers intertwined like a net, and fitted on the outer peripheral surface of the spiral tube, and a sheath covering the outer peripheral surface of the braid, and having a multilayer structure composed of inner and outer layers, at least for part of its length. The inner layer is a tube member which is formed of a high-polymer material, and is fitted on the outer peripheral surface of the braid. The outer layer is formed by applying a molten high-polymer material to the outer peripheral surface of the tube member, for cross-linking.
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