Flexible tube of endoscope and method of and apparatus for produ

Details Flexible tube of endoscope and method of and apparatus for produ Flexible tube of endoscope and method of and apparatus for produ

1990-08-08

1991-04-09

Heinrich, Sam

Metal fusion bonding

Process

Encasing a rodlike core within a substantially coextensive...

228128, 228132, 228155, 228231, 29445, 294695, 29517, 29424, 148 115C, 148 127C, 72205, 72208, 723552, 72360, B23K 3100, B23K10104, A61B 100

Patent

active

050057553

ABSTRACT:
An elongated flexible tube that constitutes an insert part of an endoscope. The flexible tube comprises: a spiral tube made of a precipitation hardening metal and having a groove which is recessed inwardly from the outer surface of the tube, the groove extending in a straight line along the axis of the tube, the spiral tube being subjected to age hardening process after a solid solution treatment; a braided-wire tube formed by weaving fine metal wires into a braid, the braided-wire tube being closely fitted over the outer surface of the spiral tube; and a flexible skin closely and watertightly fitted over the outer surface of the braided-wire tube.

REFERENCES:
patent: 320684 (1885-06-01), Platt
patent: 4295672 (1981-10-01), Williams
patent: 4646722 (1987-03-01), Silverstein et al.
patent: 4753222 (1988-06-01), Morishita
patent: 4805292 (1989-02-01), Noguchi
patent: 4869238 (1989-09-01), Opie et al.

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