US 11,986,157 B2
Braking mechanisms for steerable medical devices and related methods
John B. Golden, Norton, MA (US); Evan Wilder, Boston, MA (US); Colby Harris, Weston, MA (US); and Michael McBrien, Jamaica Plain, MA (US)
Assigned to Boston Scientific Scimed, Inc., Maple Grove, MN (US)
Filed by Boston Scientific Scimed, Inc., Maple Grove, MN (US)
Filed on Aug. 3, 2022, as Appl. No. 17/880,416.
Claims priority of provisional application 63/203,902, filed on Aug. 4, 2021.
Prior Publication US 2023/0042893 A1, Feb. 9, 2023
Int. Cl. A61B 1/005 (2006.01); G05G 1/01 (2008.04)
CPC A61B 1/0052 (2013.01) [G05G 1/01 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A steering system for a medical device, the steering system comprising:
a first drive member having a central longitudinal axis;
a central shaft extending through the first drive member;
a control knob coupled to the first drive member;
a braking knob coupled to the central shaft and including a first protrusion; and
a brake shoe member coupled to the central shaft between the control knob and the braking knob, wherein the first protrusion is positioned within a first channel of the brake shoe member;
wherein the first protrusion is configured to engage the brake shoe member to move a first arm of the brake shoe member radially outward, relative to the central longitudinal axis, towards a wall of the control knob when the braking knob is rotated in a first direction;
wherein the first arm is configured to move away from the wall of the control knob when the braking knob is rotated in a second direction opposite the first direction;
wherein the brake shoe includes:
a central portion including a lumen configured to receive the central shaft;
a first protrusion extending radially-outward, relative to the central longitudinal axis, from the central portion;
a second protrusion extending radially-outward, relative to the central longitudinal axis, from the central portion;
the first arm extending outward from the first protrusion, wherein the first arm is curved towards the central shaft and includes a first expanded end and a first recess;
a second arm extending outward from the second protrusion, wherein the second arm is curved towards the central shaft and includes a second expanded end and a second recess;
a first spring beam extending from the first arm and extending at least partially within the first recess; and
a second spring beam extending from the second arm and extending at least partially within the second recess.