Surgery – Instruments – Electrical application
Patent
1997-09-30
1999-08-10
Kamm, William E.
Surgery
Instruments
Electrical application
A61B 1736
Patent
active
059351268
ABSTRACT:
A surgical instrument for cauterization having a handle, shaft portion, and a tool. The tool is fixed to a shaft portion comprising a tube and an actuating member coaxial with the tube and adapted to be moved relative to the tube. The tool includes a generally tubular body adapted to be mounted on the end of a tube of the shaft portion. The body includes a pair of axially extending yoke arms. A pair of moveable jaws are pivotally attached to the yoke arms. Each jaw includes an elongate gripping portion having electrical contacts fixed thereto. The electrical contacts are adapted to be connected to a source of electrical power. A pair of connectors are adapted to operatively couple a respective jaw to the actuating member of the shaft portion such that movement of the actuating member relative to the tube of the shaft portion causes pivotal relative movement of the pair of jaws. The surgical instrument further includes a contact assembly housed in the handle. The contact assembly includes a socket having a bore formed therein. A radially extending circumferential groove is formed in the wall of the bore and retains a coil spring. The coil spring is electrically connected to a source of electrical power and is in sliding conductive contact with the actuation member, thereby permitting electrical contact between the coil spring and the actuation member while allowing axial and rotary movement of the actuation member relative to the contact assembly.
REFERENCES:
patent: 1274669 (1918-08-01), Bohn
patent: 5234460 (1993-08-01), Stouder, Jr.
patent: 5275608 (1994-01-01), Forman et al.
patent: 5482054 (1996-01-01), Slater et al.
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