Endoscope flexible tube and method of manufacturing the tube
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United States of America Patent
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Issued Date -
Mar 2, 2006
app pub date -
Dec 2, 2003
filing date -
Dec 2, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A fluororesin tube body (10) of an endoscope flexible tube (1) is small in diameter and thin in wall thickness to such a degree that it is difficult to maintain its cross-sectional shape by itself when the flexible tube (1) is bent to the limit. A braid (20) woven from a plurality of flat bands (21) to form a tubular shape is disposed around the tube body (10). The mesh openings of the braid (20) are filled with filling adhesive (30), which bonds the tube body (10) and the braid (20) together. The filling adhesive (30) has enough elasticity to allow deformation of the braid (20) during the bending operation and enough adhesive strength to maintain the bond between the tube body (10) and the braid (20) even when the filling adhesive (30) is elastically deformed. Consequently, the braid (20) restricts the cross-sectional deformation of the tube body (10). Thus, the limit curvature of the flexible tube (1) can be increased.
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