Needle electrode and method of assembly thereof

Details Needle electrode and method of assembly thereof Needle electrode and method of assembly thereof

1991-04-24

1992-12-15

Cohen, Lee S.

Surgery

Truss

Pad

128784, 29862, 29863, A61B 50492

Patent

active

051707888

ABSTRACT:
An electrode has a ferrule, a cannula and a wire, each with a distal end and a proximal end. The ferrule has a nose portion at its distal end and defines a nose passage terminating at a shoulder communicating with a passage having a guide opening followed by an abutment and opening into an annular recess. The proximal cannula end penetrates the nose passage and abuts the shoulder. The nose portion connects to the proximal cannula end. An insulator spool has a distal end an an axial bore smaller than the guide opening. A connective member has a cavity receiving the proximal wire end and is attached about the cavity to the proximal wire end and is secured in the axial bore of the spool that is in the annular recess with the distal wire end penetrating through the axial bore, the guide opening, and an interior cannula passage with the distal end of the spool engaging the abutment. An assembly method involves connecting the ferrule nose portion about the proximal cannula end, attaching the connector member about the cavity onto the proximal wire end, mounting the connector member into the spool bore, and inserting the spool in the annular recess with the distal wire end penetrating the axial bore, the guide opening and the interior cannula passage with the distal spool end engages the abutment.

REFERENCES:
patent: 3147750 (1964-09-01), Fry
patent: 3698394 (1972-10-01), Piper et al.
patent: 4034762 (1977-07-01), Cosens et al.
patent: 4295467 (1981-10-01), Mann et al.

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