US 11,666,251 B2
Signal and torque transmitting torque coil
Colin Boucher, St. Paul, MN (US); Shawn D. Bluhm, Lindstrom, MN (US); and Stefan Schibli, Rodenbach (DE)
Assigned to Heraeus Deutschland GmbH & Co. KG, Hanau (DE)
Appl. No. 16/346,321
Filed by HERAEUS DEUTSCHLAND GMBH & CO. KG, Hanau (DE)
PCT Filed Oct. 31, 2016, PCT No. PCT/US2016/059756
§ 371(c)(1), (2) Date Apr. 30, 2019,
PCT Pub. No. WO2017/087149, PCT Pub. Date May 26, 2017.
Prior Publication US 2020/0037931 A1, Feb. 6, 2020
Int. Cl. A61B 5/145 (2006.01); A61B 5/0215 (2006.01); A61B 5/00 (2006.01); A61M 25/09 (2006.01); H01F 27/28 (2006.01); G02B 6/44 (2006.01)
CPC A61B 5/145 (2013.01) [A61B 5/02154 (2013.01); A61B 5/6851 (2013.01); A61M 25/09 (2013.01); H01F 27/28 (2013.01); A61M 2025/09091 (2013.01); G02B 6/4415 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A torque coil comprising:
a first filar configured in an inner layer that is helically wound in a constricted state such that the first filar defines an inner lumen providing access between a proximal and distal end of the torque coil;
a second filar configured in an outer layer that is helically wound over the inner layer in a constricted state;
a third filar configured in an intermediate layer between the inner and outer layers that is helically wound over the inner layer in a constricted state and such that the first and second filars are adjacent and directly contacting each other with no intervening layers, and such that the second and third filars are adjacent and directly contacting each other with no intervening layers;
a stiffening wire filar in at least one of the inner, intermediate, and outer layers;
at least one of the first, second, and third filars comprises a signal transmitting material coated by an isolating material, each filar having its own coating of the isolated material within its layer such that each filar is electrically isolated from the stiffening wire filar within the layer, thereby allowing transmission of signals between the proximal and distal end of the torque coil in one of the layers, and at least one of the first and second filars comprises a torque transmitting material thereby configuring the torque coil to transfer torque from the proximal to the distal end.