Land vehicles – Wheeled – Occupant propelled type
Patent
1982-11-15
1985-07-02
Peters, Jr., Joseph F.
Land vehicles
Wheeled
Occupant propelled type
280269, 280282, B62K 504, B62K 1700
Patent
active
045263922
ABSTRACT:
A rear steered vehicle with improved handling and stability described by having a single front driven wheel and a pair of steered rear wheels. Cornering ability is improved while maintaining a narrow overall width by allowing the rider, front wheel, and frame to lean "into" turns thereby shifting the vehicle's center of gravity to the inside of a turn. Stability at all speeds is improved over other rear steered vehicles by the steering design which rotates the two rear wheels on separate steering axes and the lack of mechanical connection between "leaning" and "steering." This allows the correct ratio of steering and leaning at all speeds. In practice, the rider will "lean" into a turn at any speed and the rear steering geometry will react to the weight transfer and steer the correct amount to maintain stability without additional input from the rider. For extremely low speed maneuvering, the rider still has precise control of the steering due to the design of the handlebars which allow the rider to use them either for leverage to control the amount of "lean" as they remain level independent of the degree of rider/frame "lean", or to steer the rear wheels directly by rotating the handlebars as a unit around a vertical axis.
REFERENCES:
patent: 3442528 (1969-05-01), Rapemacher
patent: 3620547 (1970-11-01), Vaverec
patent: 3669468 (1970-01-01), Rich
patent: 3746118 (1971-07-01), Altorfer
patent: 3981516 (1976-09-01), Haggkvist
patent: 4132435 (1979-01-01), Wilson
patent: 4186935 (1980-02-01), Rudwick
patent: 4198072 (1980-04-01), Hopkins
patent: 4279429 (1981-07-01), Hopkins et al.
patent: 4359231 (1982-11-01), Mulcahy
patent: 4432561 (1984-02-01), Feikema
McGiehan Donn
Peters Jr. Joseph F.
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