Endoscopic flexible tube
First Claim
1. An endoscopic flexible tube comprising:
- 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 at least inner and outer layers, at least for part of its length,said inner layer including a tube member formed of a high-polymer material, and fitted on the outer peripheral surface of the braid, andsaid outer layer being formed by applying a molten high-polymer material to the outer peripheral surface of the tube member, for cross-linking.
1 Assignment
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Accused Products
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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Citations
6 Claims
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1. An endoscopic flexible tube comprising:
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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 at least inner and outer layers, at least for part of its length, said inner layer including a tube member formed of a high-polymer material, and fitted on the outer peripheral surface of the braid, and said outer layer being formed by applying a molten high-polymer material to the outer peripheral surface of the tube member, for cross-linking. - View Dependent Claims (2, 3, 4)
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5. An endoscopic flexible tube comprising:
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a spiral tube formed by deforming a belt-shaped metal member in a spiral shape; 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 an inner layer and an outer layer, at least for part of its length, wherein said inner layer is formed of at least two tube members made of high-polymer materials of different hardness, the tube members being arranged in the axial direction, and said outer layer is formed by applying a molten high-polymer material onto the outer peripheral surfaces of the tube members serving as said inner layer. - View Dependent Claims (6)
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Specification