Surgery – Instruments – Electrical application
Patent
1997-12-22
1999-11-16
Cohen, Lee
Surgery
Instruments
Electrical application
606 45, 606 49, A61B 1739
Patent
active
059849185
ABSTRACT:
An electrosurgical handpiece comprises a handle and a nose piece for threaded engagement with the handle, together with a collet member which cooperates with the handle and nose piece for removably receiving and locking multiple-sized electrosurgical electrodes to the handle. To simplify assembly, the collet end is press-fitted into a bore in the handle. For this purpose, the collet must be constituted of an electrically conductive metal that also has sufficient elasticity that it will tend to return to its unstressed condition. Preferably, the press-fitted collet end is provided with knurls or grooves to ease the press-fitting operation and prevent collet movement with respect to the handle. Preferably, the collet front end is provided with spaced jaws surrounding a single coaxial bore that is able to accommodate two-different sized shanks of electrosurgical electrodes.
REFERENCES:
patent: 3746814 (1973-07-01), Lackey et al.
patent: 3875945 (1975-04-01), Friedman
patent: 3920022 (1975-11-01), Pastor
patent: 3961630 (1976-06-01), Gonser
patent: 4638802 (1987-01-01), Okada
patent: 4657016 (1987-04-01), Garito et al.
patent: 4711239 (1987-12-01), Sorochenko et al.
patent: 5125058 (1992-06-01), Tenerz et al.
patent: 5630812 (1997-05-01), Ellman et al.
Ellman Alan G.
Garito Jon C.
Cohen Lee
Ruddy David
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