Feed through
AssigneeMedtronic, Inc.
InventorsWilliam J. Taylor, Joseph F. Lessar
Life of this patent
Estimating the term…
Abstract
Use of molydenum-containing alloys to induce wetting by TA-23 glass in metallic feedthroughs.
Claims17
An electrical feedthrough comprising an electrical terminal, a glass insulator comprising nominally 45.0 weight % SiO.sub.2, 20.0 weight % Al.sub.2 O.sub.2, 8.0 weight % B.sub.2 O.sub.3, 12.0 weight % CaO, 6.0 weight % SrO, 7.0 weight % MgO and 2.0 weight % La.sub.2 O.sub.3 positioned around a portion of the terminal and in sealing engagement therewith and an alloy sleeve or header positioned around a portion of the glass insulator for receiving same in sealing engagement therewith, the alloy comprising at least 1.3 atomic % molybdenum, and 30.3 to 80 atomic % chromium and nickel combined.
An electrochemical cell of the type including corrosive contents in a container and wherein the container includes an opening carrying an electrical terminal which extends from the interior of the cell through the opening and into the interior thereof;
- a feedthrough assembly positioned in the opening and around the terminal, the assembly comprising;
- a sleeve or header attached to the container, the sleeve or header consisting essentially of an alloy comprising at least 1.3 atomic % molybdenum, and 30.3 to 80 atomic % chromium and nickel combined and a glass seal carried by the sleeve or header and surrounding the terminal in sealing engagement therewith, the glass of the glass seal comprising nominally 45.0 weight % SiO.sub.2, 20.0 weight % Al.sub.2 O.sub.2, 8.0 weight % B.sub.2 O.sub.3, 12.0 weight % CaO, 6.0 weight % SrO, 7.0 weight % MgO and 2.0 weight % La.sub.2 O.sub.3.
Dependencies are inferred from the claim text.