초록 ▼

A centerless grinding method of finishing feedthrough pins and corresponding devices for use in implantable medical devices and for components such as batteries in implantable medical devices is disclosed. The method provides certain advantages, including the elimination of longitudinal anomalies in

A centerless grinding method of finishing feedthrough pins and corresponding devices for use in implantable medical devices and for components such as batteries in implantable medical devices is disclosed. The method provides certain advantages, including the elimination of longitudinal anomalies in drawn wire to thereby improve the hermeticity of implantable medical devices. In one of the preferred methods, the surface of an over-size medical grade wire having a known anomaly depth is centerless ground using an abrasive wheel and suitable coolant to a layer past which those anomalies disappear.

대표청구항 ▼

[ We claim:] [1.] A glass-metal hermetic seal comprising a metal pin and a sealing glass, wherein the pin is circumferentially and sealingly engaged with the sealing glass and, prior to being assembled with the glass to form the seal, includes a surface that has been subjected to a centerless grindi

[ We claim:] [1.] A glass-metal hermetic seal comprising a metal pin and a sealing glass, wherein the pin is circumferentially and sealingly engaged with the sealing glass and, prior to being assembled with the glass to form the seal, includes a surface that has been subjected to a centerless grinding process for removing defects and anomalies therefrom such that the hermetic seal withstands at least 19-21 pin bend cycles.