Tricycle

Details Tricycle Tricycle

1982-07-12

1984-06-26

Mitchell, David M.

Land vehicles

Wheeled

Occupant propelled type

180205, 180215, 272 73, 280202, 280269, 280283, 280289A, 280289S, B62K 2306, B62M 106

Patent

active

044562772

ABSTRACT:
Human-powered, front-wheel drive tricycle of a 2DS-1IS (2 driven, steerable-1 independent suspension) format having two steerable front wheels in a fully engineered front end, a multi-triangulated space frame and a single trailing rear wheel mounted in an independent swing-arm type suspension. A chain drive system (21+speeds) includes a crank assembly mounted on a prow ahead of the front wheels driving a transfer gear and differential to the split front axle. A transfer gear caliper/disc braking system ahead of the differential provides braking force equally distributed to both front wheels regardless of road conditions, resulting in anti-skid properties. Track/wheelbase ratios above 0.45 provide stability and excellent handling; FWD provides excellent traction. Preferably, all wheels are of the same 20" diameter. Rider is in a semi-recumbent, supine position with handlebars, having shift and braking controls, mounted beneath a rigid seat. Shoulder harness and seat belt system are provided. Faired, semi-faired and unfaired models disclosed, with full fairing including an open-top cockpit, NACA inlets and safety lighting system, capable of speeds in the 40-60 mile-per-hour range. Crank motor assist, rear wheel motor drive, and PTO for Third World usage shown.

REFERENCES:
patent: 3827519 (1974-08-01), Snider
patent: 3843145 (1974-10-01), Templeton
patent: 3910126 (1975-10-01), Felder
patent: 3913929 (1975-10-01), Matsuura
patent: 3940166 (1976-02-01), Smithea
patent: 4061460 (1977-12-01), George
patent: 4198072 (1980-04-01), Hopkins
patent: 4303256 (1981-12-01), Mortensen
patent: 4325448 (1982-04-01), Pivar
patent: 4333664 (1982-06-01), Turner et al.
patent: 4360224 (1982-11-01), Sato et al.

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