Endoscopic instrument having non-bonded, non-welded rotating act

Details Endoscopic instrument having non-bonded, non-welded rotating act Endoscopic instrument having non-bonded, non-welded rotating act

1996-06-21

1998-04-21

Thaler, Michael H.

Surgery

Instruments

Cutting, puncturing or piercing

606 46, 606205, A61B 1700

Patent

active

057412855

ABSTRACT:
An actuator for an endoscopic instrument includes a handle having a through bore with a distal keyway and a lever which is pivotally coupled to the handle. A proximal tube sleeve is insert molded or press fit to the proximal end of the instrument tube. The tube sleeve has a pair of ramped thread-like projections and a pair of distally facing wedge-like projections all of which pass through the keyway in the handle. A proximal stop ring on the tube sleeve prevents the tube sleeve from passing completely through the handle. A ferrule having a pair of interior threadlike projections threadably engages the tube sleeve and is frictionally engaged by the wedge-like projections. A ferrule locking cap having a proximal inner groove and a distal flange fits in the annular space between the tube sleeve and the ferrule. The proximal groove engages a locking ring on the tube sleeve and splines on the tube sleeve and the ferrule frictionally engage the cap. The tube sleeve and the ferrule engage the cap with some friction so that the tube may be rotated relative to the handle but will not rotate relative to the ferrule.

REFERENCES:
patent: 4368734 (1983-01-01), Banko
patent: 5174300 (1992-12-01), Bales et al.
patent: 5258006 (1993-11-01), Rydell et al.
patent: 5282800 (1994-02-01), Foshee et al.
patent: 5286255 (1994-02-01), Weber
patent: 5308358 (1994-05-01), Bond et al.
patent: 5314424 (1994-05-01), Nicholas
patent: 5330502 (1994-07-01), Hassler et al.
patent: 5342381 (1994-08-01), Tidemand
patent: 5344428 (1994-09-01), Griffiths
patent: 5383888 (1995-01-01), Zvenyatsky et al.

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