US 12,029,469 B2
Surgical shears having ferromagnetic heater
Mark Stringham, Kearns, UT (US); Preston Manwaring, Farmington, UT (US); Philip Eggers, Cottonwood Heights, UT (US); and Scott Denis, Murrieta, CA (US)
Assigned to Domain Surgical, Inc., Salt Lake City, UT (US)
Filed by Domain Surgical, Inc., Salt Lake City, UT (US)
Filed on Oct. 25, 2019, as Appl. No. 16/664,458.
Claims priority of provisional application 62/750,747, filed on Oct. 25, 2018.
Prior Publication US 2020/0129222 A1, Apr. 30, 2020
Int. Cl. A61B 18/08 (2006.01); A61B 18/00 (2006.01); H05B 1/02 (2006.01)
CPC A61B 18/085 (2013.01) [H05B 1/025 (2013.01); A61B 2018/00077 (2013.01); A61B 2018/00101 (2013.01); A61B 2018/0013 (2013.01); A61B 2018/00136 (2013.01); A61B 2018/00148 (2013.01); A61B 2018/0063 (2013.01); A61B 2018/00821 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A surgical device, comprising:
a ferromagnetic heater assembly, including:
an electrical conductor having a first leg, a second leg, and a vertical bend connecting the first and second legs, the vertical bend located at a distal tip of the electrical conductor, the first and second legs being spaced apart from one another along a vertical direction between the distal end and a proximal end of the electrical conductor, the first leg including a first outer surface and a first inner surface, the first inner surface opposite the first outer surface, the second leg including a second outer surface and a second inner surface, the second inner surface facing the first inner surface, and the second outer surface opposite the second inner surface such that the second outer surface faces away from the first leg;
a ferromagnetic heater on the first leg of the electrical conductor, the ferromagnetic heater including a heating element that generates heat in response to current flowing through the electrical conductor; and
an encapsulant at least partially surrounding the heating element of the ferromagnetic heater and at least a portion of both the second inner surface and the second outer surface of the second leg opposite the ferromagnetic heater, a surface of the ferromagnetic heater being at least partially exposed by the encapsulant, wherein the surface of the ferromagnetic heater is a tissue-contacting surface that faces in the vertical direction; and
a first spacer positioned between the first inner surface and the second inner surface of the electrical conductor along the vertical direction such that the first spacer imparts vertical stiffness to the first leg and the second leg and limits vertical movement of the first leg towards the second leg upon application of pressure to the tissue-contacting surface, wherein the first spacer is surrounded by the encapsulant.