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US 4,327,711 AGranted
Flexible tube for an endoscope
AssigneeOlympus Optical Co., Ltd.
InventorTakeji Takagi
Life of this patent
Estimating the term…
Abstract
In a flexible tube for an endoscope including a metallic braided texture and a sheath tube covering the braided texture, both of which form a bendable portion and/or a flexible portion of an endoscope through which bundles of optical fibres, a flexure controlling wire or the like are passed, the internal peripheral surface of the sheath tube which covers the metallic braided texture is formed with grooves which retain an antifriction agent therein.
Claims7
A flexible tube for an endoscope, comprising:
- a control wire and an optical system extending along a longitudinal axis of said tube;
- a metallic braided sheath extending along said axis and surrounding said control wire and said optical system;
- and
- a sheath tube extending along said axis and surrounding said braided sheath such that an internal peripheral surface of said sheath tube is disposed in opposing relationship with said metallic braided sheath, said internal peripheral surface being formed with grooves which retain an anti-friction agent therein.
1 more element
Dependencies are inferred from the claim text.