초록 ▼

A tricycle has two non-steerable rear wheels connected to a rear frame structure, and a single steerable front wheel connected to a front frame structure. The front frame structure includes a horizontal tubular frame element extending underneath the rear frame structure for swingable connection to t

A tricycle has two non-steerable rear wheels connected to a rear frame structure, and a single steerable front wheel connected to a front frame structure. The front frame structure includes a horizontal tubular frame element extending underneath the rear frame structure for swingable connection to the rear frame structure, such that the front frame structure can lean away from a normal upright position centered between the rear wheels. During a turning maneuver the leaning capability is advantageous in maintaining the rear wheels in pressure contact with the road surface so as to enhance the stability of the tricycle. A manually-operated locking mechanism is provided for releasably locking the front frame structure in its normal upright centered position. The locking mechanism keeps the front frame structure in a stable mode when the person is mounting or dismounting the tricycle, and also when the tricycle is being driven at low speeds in which there is minimal danger of the tricycle tipping or overturning.

대표청구항 ▼

[ Having described my invention, I claim:] [1.] A tricycle comprising:two rear ground wheels;a rear frame means connected to said rear ground wheels for rotary movements;a single front ground wheel;a front frame means that includes an upstanding head tube;means for steering said front wheel, compris

[ Having described my invention, I claim:] [1.] A tricycle comprising:two rear ground wheels;a rear frame means connected to said rear ground wheels for rotary movements;a single front ground wheel;a front frame means that includes an upstanding head tube;means for steering said front wheel, comprising a handlebar means and a front fork means rotatably supported by said head tube;said front frame means comprising a horizontal frame element extending underneath said rear frame means;hanger means swingably suspending said horizontal frame element for pivotal motion around a horizontal axis located midway between said rear ground wheels;seat means carried by said front frame means for supporting a rider in an upright position behind said handlebar means, whereby the rider can turn the handlebars and shift his weight to swing said front frame means in order to turn the tricycle without tipping the rear frame means; andmanually-operated means for releasably locking said front frame means in a neutral upright position wherein said horizontal frame element is directly below said horizontal suspension axis.