Streamlined bicycle design

US4411443A · kind A · utility

Inventor

• Christopher Pollard · Coventry, GB

Key dates

• Filing date: Jun 13, 1980
• Grant date: Oct 25, 1983
• Expiry date: Jun 13, 2000

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B62J17/083
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The invention includes a low-drag cycle having an elongated frame extending between a smaller front wheel and a larger rear wheel. A cyclist assumes a recumbant position over the frame facing down. A cycle is steered by means of the front wheel, while the cyclist powers the cycle by means of a pedal arrangement driving the larger rear wheel. A streamlined, pod-shaped body which is symmetrical about an axis parallel to the direction of travel achieves a very low coefficient of drag and maximizes laminar flow to further reduce drag. The cycle wheels are contained within two streamlined fairings which extend from the streamlined cycle body to near the ground, the area between wheels being left open to increase the lateral stability of the cycle and to allow the rider to straddle the frame so that both feet may be placed on the ground while starting or stopping the cycle. Once sufficient speed is attained to ensure stability, hinged doors in the streamlined body automatically close as the cyclist returns both feet to the pedals.