United States Patent  [ill Patent Number: 4,922,607
Doan et al.  Date of Patent: May 8,1990
 METHOD OF FABRICATION AN IN-LINE, MULTIPOLAR ELECTRICAL CONNECTOR
 Inventors: Phong D. Doan, Shoreview; James E.
Upton, New Brighton; Douglas H.
Hess, Maple Grove; Wayne R. Bass,
Coon Rapids; Keith A. Ufford, Maple
Grove, all of Minn.
 Assignee: Medtronic, Inc., Minneapolis, Minn.
 Appl. No.: 198,540
 Filed: May 25, 1988
 Int. C1.5 A61N 1/04; H01R 43/00
 U.S. Q 29/879; 29/530;
 Field of Search 29/876, 530, 877, 879,
29/872; 128/419 P, 784
 References Cited
U.S. PATENT DOCUMENTS
4,258,725 3/1981 O'Neill 128/419 P
4,387,727 6/1983 Sandstrom 128/784
4,437,474 3/1984 Peers-Trevarton 29/876
4,469,104 9/1984 Peers-Trevarton 128/419 P
4,572,605 2/1986 Hess 339/177 R
FOREIGN PATENT DOCUMENTS
1146228 5/1983 Canada 337/70
Primary Examiner—Timothy V. Eley
Attorney, Agent, or Firm—Reed A. Duthler; Joseph F.
A cardiac pacing lead having a plurality of individually insulated conductors arranged as a multifilar coil. The lead includes a connector assembly and a ring electrode assembly, each of which are optimized for use in conjunction with conductors arranged in the form of a multifilar coil. The connector assembly takes the form of an in-line connector having a plurality of linearly arranged connecting surfaces, each coupled to one of the conductors in the multifilar coil. The ring electrode assembly is constructed such that it displays the same outer diameter as the pacing lead. In both assemblies, conductors are coupled by means of welds, rather than by crimping or swaging.
7 Claims, 4 Drawing Sheets