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Partially-bicycle-powered espresso maker

This is a partially-bicycle-driven espresso maker and coffee vending cart called a velopresso. The prototype is on display at Conway Hall in London. The inventors describe it lovingly, in the engineering sense:

Rear-steering and front-wheel drive give a very tight turning circle and optimal transmission arrangement. The transmission incorporates both roller-chains and belt-drives and a lever-operated clutch mechanism that allows the pedal drive to be switched from powering the wheels to directly (mechanically) driving the grinder.

This video shows it in action (though the action-filled part of the video is relatively brief — see especially around the 2:20 point):


(Thanks to investigators Sid Rodrigues and Elizabeth Donnelly for bringing this to our attention.)

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