Rotational coupling device and method

Patent metadata

Field	Value
Publication number	US-2022299055-A1
Application number	US-202217680589-A
Country	US
Kind code	A1
Filing date	Feb 25, 2022
Priority date	Mar 2, 2021
Publication date	Sep 22, 2022
Grant date	—

Abstract

Various disclosed embodiments include illustrative apparatuses, medical systems, and methods for attaching two dissimilar materials. In an illustrative embodiment, an apparatus includes a first rod formed from a first material and a second rod formed from a second material. The first rod includes a first end defining a cavity exposed at an end of the first rod. The cavity has a cavity length and a cavity width perpendicular to a longitudinal axis of the first rod. The cavity length is greater than the cavity width. The second rod includes a first section and a second section. The first section has a width that corresponds to the cavity width and a length that corresponds to the cavity length. The apparatus includes a bonding structure that attaches the first rod to the second rod.

First claim

What is claimed is:

1 . An apparatus comprising:
a first rod formed from a first material, the first rod including a first end configured to define a cavity exposed at an end of the first rod, the cavity having a cavity length and a cavity width perpendicular to a longitudinal axis of the first rod, the cavity length being greater than the cavity width; a second rod formed from a second material, the second rod including a first section and a second section, the first section having a width that corresponds to the cavity width and a length that corresponds to the cavity length; and a bonding structure configured to attach the first rod to the second rod.

2 . The apparatus of claim 1 , wherein the second section of the second rod has a cross-sectional dimension that is less than the width of the first section, and the cross-sectional dimension of the second section of the second rod is greater than a thickness of the first section.

3 . The apparatus of claim 1 , wherein the bonding structure comprises a weld between the first and second rods at an opening of the cavity.

4 . The apparatus of claim 1 , wherein the bonding structure includes:
a cap having a passageway having a dimension being greater than the cross-sectional dimension of the second rod and less than the first dimension of the first section; and an additional bonding structure configured to bond the collar to a surface of the first rod around the cavity.

5 . The apparatus of claim 4 , wherein the additional bonding structure includes a weld joint between the first and second rods within the cavity.

6 . The apparatus of claim 4 , wherein the additional bonding structure includes an adhesive applied between the first and second rods at an opening of the cavity.

7 . The apparatus of claim 1 , wherein the bonding structure comprises an adhesive applied between the first and second rods within the cavity.

8 . The apparatus of claim 1 , wherein the first material comprises stainless steel.

9 . The apparatus of claim 8 , wherein the second material comprises nitinol.

10 . A medical system comprising:
a handle; a first rod couplable to the handle, the first rod formed from a first material, the first rod configured to define a cavity exposed at an end of the first rod, the cavity having a cavity length and a cavity width perpendicular to a longitudinal axis of the first rod, the cavity length being greater than the cavity width; a second rod formed from a second material, the second rod including a first section and a second section, the first section having a width that corresponds to the cavity width and a length that corresponds to the cavity length; and a bonding structure configured to attach the first rod to the second rod.

11 . The medical system of claim 10 , wherein the second section of the second rod has a cross-sectional dimension that is less than the width of the first section, and the cross-sectional dimension of the second section of the second rod is greater than a thickness of the first section.

12 . The medical system of claim 10 , wherein the bonding structure comprises a weld between the first and second rods at an opening of the cavity.

13 . The medical system of claim 10 , wherein the boding structure includes:
a cap having a passageway having a dimension being greater than the cross-sectional dimension of the second rod and less than the first dimension of the first section; and an additional bonding structure configured to bond the collar to a surface of the first rod around the cavity.

14 . The medical system of claim 13 , wherein the bonding structure includes a weld joint between the first and second rods within the cavity.

15 . The medical system of claim 13 , wherein the bonding structure includes an adhesive applied between the first and second rods at an opening of the cavity.

16 . The medical system of claim 10 , wherein the bonding structure includes adhesive applied between the first and second rods within the cavity.

17 . The medical system of claim 10 , wherein the first material includes stainless steel.

18 . The medical system of claim 17 , wherein the second material includes nitinol.

19 . A method comprising:
forming a cavity into an end of a first rod; forming an end of a second rod to fit within the cavity of the first rod; inserting the formed end of the second rod into the first rod; and securing the second rod to the first rod, wherein the cavity and the formed end of the second rod are configured to allow torque transmission between the first rod in the second rod.

20 . The method of claim 19 , wherein securing the second rod to the first rod includes:
passing a collar over a second end of the second rod; and bonding the collar to the end of the first rod.

Assignees

• Gyrus Acmi Inc Dba Olympus Surgical Technologies America

Inventors

• Tenne Dirk
• Graham Madeline C

Classifications

• A61M25/09

  Guide wires · CPC title

• B23K31/02

  relating to soldering or welding · CPC title

• A61B17/00 Primary

  Surgical instruments, devices or methods (A61B18/00 takes precedence; dental tools A61C3/00; eye surgery A61F9/007; ear surgery A61F11/20) · CPC title

• F16C3/023

  made of several parts, e.g. by welding · CPC title

• F16C2316/10

  in medical appliances, e.g. in diagnosis, dentistry, instruments, prostheses, medical imaging appliances · CPC title