Rotational systems comprising a polymer driveshaft

US11432840B2 · kind B2 · utility

Assignee

• Cardiovascular Systems, Inc. · US

Inventors

• Preston L. Grothe · Maple Grove, US
• Matthew D. Cambronne · Stillwater, US
• Joseph P. Higgins · Minnetonka, US
• William F. Kuester, III · Blaine, US
• Benjamin D. Haselman · Dayton, US
• Joshua J. Cranston · Andover, US
• Ric A. Gould · Brooklyn Park, US
• Nicholas W. Rydberg · Oakdale, US

Key dates

• Filing date: Mar 25, 2019
• Grant date: Sep 6, 2022
• Expiry date: Jan 6, 2041

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2217/007
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Various embodiments of devices and systems comprising a polymer driveshaft for use in high-speed rotational medical procedures, e.g., atherectomy, are disclosed. Generally, the primary driveshaft for transferring torque and activating rotation of a tool attached thereto, e.g., an abrasive element, is constructed with at least a polymer outer and inner surface. In certain embodiments, the polymer driveshaft may comprise a metallic band for fixed attachment of a structure, e.g., an abrasive element, thereto. Various embodiments may comprise a coupler that connects a drive shaft connected with a prime mover, e.g., a turbine or electric motor, with the polymer drive shaft, the coupler comprising openings through the coupler wall to the inner diameter of the coupler to allow fluid flow to the inner diameter of the coupled polymer drive shaft.