Endoscope of which the bending part is operated by fluid...

Details Endoscope of which the bending part is operated by fluid... Endoscope of which the bending part is operated by fluid...

2005-10-04

2005-10-04

Flanagan, Beverly M. (Department: 3739)

Surgery

Endoscope

Having flexible tube structure

C600S139000, C600S146000

Reexamination Certificate

active

06951537

ABSTRACT:
An endoscope whose bending section is moved with supply or discharge of fluid comprises: a fluid-pressure actuator that is included as a bending section in an insertion unit and has fluid chambers associated with a plurality of bending directions; and fluid supply tubes over which fluid is supplied from a fluid pressure source to the respective fluid chambers of the fluid-pressure actuator or fluid supplied to the respective fluid chambers is discharged. The fluid-pressure actuator comprises: a soft multi-lumen tube that has a center through hole and a plurality of penetrating holes which surrounds the center through hole and which realizes the fluid chambers; an internal tubular member that is inserted in the center through hole; and an external tubular member that is put on the periphery of the multi-lumen tube with a gap, which allows each fluid chamber to axially stretch and radially slightly expand during supply of fluid to the fluid chamber and thus eases bending, created between them.

REFERENCES:
patent: 4976191 (1990-12-01), Suzumori et al.
patent: 5577992 (1996-11-01), Chiba et al.
patent: 11-318817 (1999-11-01), None
patent: 2001-258819 (2001-09-01), None

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