Manual wheelchair system for improved propulsion and transfers

摘要

A manual wheelchair including a frame, a drive wheel connected to the frame, having a first axis of rotation and configured to rotate relative to the frame, a push rim connected to the frame, having a second axis of rotation extending substantially parallel to the first axis of rotation of the drive wheel and configured to rotate relative to the frame, wherein the second axis of rotation of the push rim is offset from the first axis of rotation of the drive wheel in a direction orthogonal to the first axis of rotation of the drive wheel, and a transmission configured to transmit rotation of the push rim to rotation of the drive wheel. Additionally, the wheelchair may also include multispeed fixed-gear hubs for propulsion on different terrain and removable or rotatable push rims for easier transfers.

主权项

1. A manual wheelchair comprising:
a frame; a drive wheel connected to the frame, having a first axis of rotation and configured to rotate relative to the frame; a push rim connected to the frame, having a second axis of rotation extending substantially parallel to the first axis of rotation of the drive wheel and configured to rotate relative to the frame, wherein the second axis of rotation of the push rim is offset from the first axis of rotation of the drive wheel in a direction orthogonal to the first axis of rotation of the drive wheel; a transmission configured to transmit rotation of the push rim to rotation of the drive wheel; and a push rim repositioning mechanism comprising a guide rail attached to the frame and a push rim axle connected to the guide rail and the push rim axle, wherein the push rim axle is configured to be movable along the guide rail and the push rim is configured to rotate relative to the frame.