Surgery – Endoscope – With particular arrangement of internal elements
Reexamination Certificate
2005-08-02
2005-08-02
Leubecker, John P. (Department: 3739)
Surgery
Endoscope
With particular arrangement of internal elements
C600S182000, C600S101000
Reexamination Certificate
active
06923757
ABSTRACT:
An endoscope which has small bending resistance and is hard to be damaged or broken even when it is repeatedly used is disclosed. The endoscope includes a flexible insertion section2and an operation section7provided on the proximal end of the insertion section2. The insertion section2has a sheath constructed from an outer layer382and the like, and elongated members such as an image guide31and light guides32, 32and the like are housed in lumens in the sheath. Further, each light guide32has an optical fiber bundle and a protective sheath321for protecting the optical fiber bundle. In the interior space of the protective sheath321, a lubricant5containing a silicone oil and a solid lubricant is provided. The solid lubricant contains at least one of boron nitride, poly tetrafluoroethylene, and molybdenum disulfide. The solid lubricant is preferably formed into powder having an average grain size of 0.1 to 15 μm. By providing the lubricant5in the interior space of the lumen, bending resistance of the insertion section is reduced so that damage, breakage, or the like is hard to occur in the elongated members.
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English Language Abstract of JP 2001-302286.
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Abe Masanao
Gonda Kazuhiko
Greenblum & Bernstein P.L.C.
Leubecker John P.
PENTAX Corporation
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