Braking mechanisms for steerable medical devices and related methods

Patent metadata

Field	Value
Publication number	US-12419504-B2
Application number	US-202418640073-A
Country	US
Kind code	B2
Filing date	Apr 19, 2024
Priority date	Aug 4, 2021
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

A steering system for a medical device may include 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. The first protrusion may be positioned within a first channel of the brake shoe member; the first protrusion may be configured to engage the brake shoe member to move a first arm of the brake shoe member radially outward towards a wall of the control knob when the braking knob is rotated in a first direction; and the first arm may be configured to move away from the wall when the braking knob is rotated in a second direction.

First claim

We claim:

1. A steering system for a medical device, the steering system comprising:
a brake shoe member comprising:
a central portion including a lumen configured to receive a shaft of the medical device;
a first protrusion extending radially-outward, relative to a central longitudinal axis of the lumen, from the central portion;
a second protrusion extending radially-outward, relative to the central longitudinal axis of the lumen, from the central portion;
a first arm extending outward from the first protrusion, wherein the first arm is curved 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 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.

2. The steering system of claim 1 , wherein the first arm of the brake shoe member is configured to engage a wall of a control knob of the steering system when a braking knob is rotated in a first direction; and
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.

3. The steering system of claim 2 , further comprising a dual-stop member abutting the brake shoe member.

4. The steering system of claim 3 , wherein the dual-stop member is configured to limit rotation of the control knob and the braking knob.

5. The steering system of claim 3 , wherein the dual-stop member is coupled to the brake shoe member via at least one pin.

6. The steering system of claim 1 , wherein a first channel extends between the central portion and the first arm, wherein the first channel is configured to receive a protrusion of a braking knob of the steering system, and wherein the braking knob is configured to engage the brake shoe member to move the first arm radially outward, relative to the central longitudinal axis, towards a wall of a control knob when the braking knob is rotated in a first direction.

7. The steering system of claim 1 , further comprising a control knob including a recess configured to receive the brake shoe member.

8. The steering system of claim 7 , further comprising a braking knob including a first protrusion configured to abut the first arm.

9. The steering system of claim 8 , wherein the braking knob includes a second protrusion configured to abut the second arm.

10. The steering system of claim 1 , wherein the first expanded end includes a rough surface, grooves, and/or teeth configured to engage a wall of the medical device; and the second expanded end includes a rough surface, grooves, and/or teeth configured to engage the wall.

11. The steering system of claim 1 , wherein the brake shoe member further includes:
a first lumen extending through the first expanded end; and
a second lumen extending through the second expanded end.

12. The steering system of claim 1 , wherein the first recess extends from the first expanded end to a portion of the first arm spaced from the expanded end.

13. A steering system for a medical device, the steering system comprising:
a brake shoe member comprising:
a central portion including a lumen configured to receive a shaft of the medical device;
a first protrusion extending radially-outward, relative to a central longitudinal axis of the lumen, from the central portion;
a second protrusion extending radially-outward, relative to the central longitudinal axis of the lumen, from the central portion;
a first arm extending outward from the first protrusion, wherein the first arm is curved 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 and includes a second expanded end and a second recess;

a first lumen extending through the first expanded end; and
a second lumen extending through the second expanded end.

14. The steering system of claim 13 , wherein the first arm of the brake shoe member is configured to engage a wall of a control knob of the steering system when a braking knob is rotated in a first direction; and
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.

15. The steering system of claim 13 , further comprising a dual-stop member abutting the brake shoe member.

16. The steering system of claim 15 , wherein the dual-stop member is configured to limit rotation of the control knob and the braking knob.

17. The steering system of claim 15 , wherein the dual-stop member is coupled to the brake shoe member via at least one pin.

18. The steering system of claim 13 , wherein a first channel extends between the central portion and the first arm, wherein the first channel is configured to receive a protrusion of a braking knob of the steering system, and wherein the braking knob is configured to engage the brake shoe member to move the first arm radially outward, relative to the central longitudinal axis, towards a wall of a control knob when the braking knob is rotated in a first direction.

19. The steering system of claim 13 , further comprising a control knob including a recess configured to receive the brake shoe member.

20. The steering system of claim 13 , wherein the first expanded end includes a rough surface, grooves, and/or teeth configured to engage a wall of the medical device; and the second expanded end includes a rough surface, grooves, and/or teeth configured to engage the wall.

Assignees

• Boston Scient Scimed Inc

Inventors

• Golden John B
• Wilder Evan
• Harris Colby
• Mcbrien Michael

Classifications

• G05G1/01

  Arrangements of two or more controlling members with respect to one another (double foot control, e.g. for instruction vehicles G05G1/34; mounting units comprising an assembly with two or more pedals G05G1/36) · CPC title

• A61M25/0147

  with movable mechanical means, e.g. pull wires · CPC title

• A61M25/0136

  Handles therefor · CPC title

• A61B1/0057

  Constructional details of force transmission elements, e.g. control wires · CPC title

• A61B1/0052 Primary

  Constructional details of control elements, e.g. handles · CPC title