Surgery – Truss – Perineal
Patent
1987-07-28
1988-08-09
Grieb, William H.
Surgery
Truss
Perineal
138120, A61B 100
Patent
active
047621192
ABSTRACT:
In a cable-steerable endoscope or borescope, in which opposing cables are displaced to deflect the tip of the endoscope or borescope, a self-adjusting mechanism in the control section ensures a maximal differential force and a minimal total force is applied to the two steering cables. The self-adjusting mechanism has a frame that is affixed within the control section and a slider that is slidably disposed on the frame. First and second arms project outwardly from the slider and engage ends of the cable sheaths for the steering cables. The slider has a structure that engages the frame when there is no force on one steering cable to lock the slider against sliding motion, but which permits the slider to move proximally on the frame when there are forces applied on both steering cables. This arrangement, along with a reset spring, automatically takes up play or slack in the cable when it is not necessary, and also avoids simultaneous tensioning of the two cables which produces high steering forces that can damage the steering section.
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Allred, III Jimmie B.
Krauter Allan I.
Grieb William H.
Welch Allyn Inc.
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