Bent state holding mechanism of an endoscope

Details Bent state holding mechanism of an endoscope Bent state holding mechanism of an endoscope

2007-04-19

2010-11-09

Dvorak, Linda C (Department: 3739)

Surgery

Endoscope

Having flexible tube structure

C600S146000, C600S147000

Reexamination Certificate

active

07828725

ABSTRACT:
A bent state holding mechanism for an endoscope which includes a control portion and an insertion portion extending therefrom, the insertion portion having a bendable portion at a distal end thereof, including a bendable portion control mechanism provided on the control portion, which is operated to bend the bendable portion, and at least two frictional resistance producing members which rotate relative to each other upon operation of the bendable portion control mechanism, to exert a frictional resistance for holding the bendable portion at any operated position. The two frictional resistance producing members include a radial plate spring made of resilient metal which includes a ring portion and a plurality of radial projections which project radially outwards from the ring portion; and an annular friction member having a pressure surface which is brought to be pressed obliquely against flat surfaces of the plurality of radial projections.

REFERENCES:
patent: 5329887 (1994-07-01), Ailinger et al.
patent: 5496260 (1996-03-01), Krauter et al.
patent: 5507717 (1996-04-01), Kura et al.
patent: 2001/0037051 (2001-11-01), Fujii et al.
patent: 9-98942 (1997-04-01), None
patent: 10-286220 (1998-10-01), None
patent: 2005-160791 (2005-06-01), None
U.S. Appl. No. 11/737,291 to Maruyama, filed Apr. 19, 2007.
U.S. Appl. No. 11/737,331 to Maruyama, filed Apr. 19, 2007.
An English language Abstract and English language computer-generated translation of JP 9-98942.
An English language Abstract and English language computer-generated translation of JP 10-286220.
An English language Abstract and English language computer-generated translation of JP 2005-160791.

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