Needle electrode and method of assembly thereof
US5170788A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Apr 24, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49185
- WIPO fieldMedical technology
- WIPO sectorInstruments
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…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.