Insertion unit for endoscope

Details Insertion unit for endoscope Insertion unit for endoscope

2005-04-12

2005-04-12

Flanagan, Beverly M. (Department: 3739)

Surgery

Endoscope

With particular arrangement of internal elements

C600S139000

Reexamination Certificate

active

06878108

ABSTRACT:
An insertion unit for an endoscope includes a flexible tube having an inner diameter D1and an inner cross-sectional area S, and a plurality of components inserted and arranged in said flexible tube. The plurality of components include at least one optical fiber bundle. The insertion unit is configured such that the inner diameter D1is not less than 6.5 mm and the inner cross-sectional area S satisfies the condition of 0.5≦Σs/s≦0.6, where Σs represents a sum of cross-sectional areas of the components arranged in the flexible tube. Alternatively, the insertion unit is configured such that the inner diameter D1is less than 6.5 mm and the inner cross-sectional area S satisfies the condition of 0.5≦Σs/s≦0.65.

REFERENCES:
patent: 4784464 (1988-11-01), Ouchi
patent: 6585639 (2003-07-01), Kotmel et al.
patent: 54-18094 (1979-02-01), None
patent: 63-48243 (1988-12-01), None
patent: 3-42895 (1991-06-01), None
patent: 6-17945 (1994-03-01), None
patent: 7-85129 (1995-09-01), None

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