Patent ID: 8761887

Claim:
A method of manufacturing a header for an implantable pulse generator comprising: a. forming a header casing having a wall surrounding a bore and a groove, defined by opposing walls, and open to both the outside of the header casing and the bore of the header casing; a plurality of spring contact rings, each spring contact ring having a bore; a plurality of ring seals, each ring seal having a bore; a bushing having a bore, a reduced outer diameter outer section and a raised flange at one end; and a spring clip having first and second legs extending from opposite ends of a joining section, each of the first and second legs having an intermediate arch section, the distance between the first and second legs being about the same as the outer diameter of the reduced diameter outer section of the bushing and less than the outer diameter of the raised flange; and b. forming a subassembly by (a) inserting at least some of the plurality of spring contact rings and at least some of the plurality of ring seals into the bore of the header casing such that each spring contact ring is separated from any adjacent spring contact ring by a ring seal, (b) inserting the bushing, raised flange end first, into the bore such that the raised flange end of the bushing is in contact with the outermost ring seal of the plurality of ring seals and the reduced outer diameter section is aligned with the groove of the header casing, (c) inserting the spring clip, legs first, into the groove from the outside of the header casing so that the legs firmly engage the opposing walls of the groove and the raised flange of the bushing to secure the spring contact rings and ring seals in a position in which adjacent spring contact rings and ring seals are in contact with each other and the bores through the bushing and each of the spring contact rings and rings seals of the subassembly are aligned with each other.