Other

Global Research Innovation and Technology L3c

Gwyndaf M Jones

Harrison O'Hanley

Mario Bollini

Benjamin Judge

Daniel D Frey

Amos G Winter, V

Benjamin H Gallup

Danielle Hicks

Nydia Ruleman

Danielle M DeLatte

Xuefeng Chen

Natasha K Scolnik

A manually powered wheelchair includes a first lever associated with a first rear wheel and demountably coupled to a first drivetrain, the first lever having a first brake thereon. The wheelchair also includes a second lever associated with a second rear wheel and demountably coupled to a second drivetrain, the second lever having a second brake thereon. Each drivetrain includes a chainring, a chain, and a freewheel, and each drivetrain has a fixed gear ratio. The freewheel of each drivetrain is actuated by manual pivoting of the lever associated therewith. In use, the wheelchair achieves changes in mechanical advantage when a user shifts the user's hands up and down the first and second levers.

Wheelchair with lever drivetrain

A pivotless suspension system for a bicycle comprising a shock absorber integral to the frame and an inherently resilient structural member to assist in the suspension system. An adjustable air spring is mounted integral to a seat stay and comprises means for selectably pumping and venting the air spring to increase or decrease ride stiffness. A titanium frame embodiment comprises either a standard or elevated resilient chainstay which acts as the resilient structural member and assists the air spring in the suspension system. A bump driven pump for the air spring; handle bar control of pumping and venting; and a locking means for effectively nullifying the suspension can be provided.

Pivotless human-powered vehicle suspension system

Growing community of inventors

Carlisle, MA, United States of America

Gwyndaf M Jones