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A pedal drive for a tricycle having a single driven rear wheel and two steerable front wheels. There are a pair of matched, laterally spaced sprockets mounted on a transverse shaft and a pair of matched, laterally sprockets rotatably mounted forwardly of the sprockets on said shaft. Each of the forw

A pedal drive for a tricycle having a single driven rear wheel and two steerable front wheels. There are a pair of matched, laterally spaced sprockets mounted on a transverse shaft and a pair of matched, laterally sprockets rotatably mounted forwardly of the sprockets on said shaft. Each of the forward sprockets is aligned in a common plane with a corresponding sprocket on the transverse shaft. An endless chain extends about each pair of corresponding sprockets. Two elongate arm members, each with a foot pedal mounted on its bottom end, are pivotally mounted on a frame member of the tricycle. Two connecting links join the arm members to the endless chains. A third endless chain transmits power via a third sprocket on the transverse shaft to the rear wheel. The preferred tricycle is tiltable in order that it can maneuver corners quickly. Spring means are provided to bias the tricycle towards a desired tilting or non-tilting position.

대표청구항 ▼

A tricycle comprising a frame including means for mounting front and rear wheels and a steering mechanism; a seat mounted on said frame; a single driven rear wheel mounted to said frame; a pair of steerable, spaced-apart front wheels mounted to said frame; means for turning said front wheels substan

A tricycle comprising a frame including means for mounting front and rear wheels and a steering mechanism; a seat mounted on said frame; a single driven rear wheel mounted to said frame; a pair of steerable, spaced-apart front wheels mounted to said frame; means for turning said front wheels substantially in unison; a pair of matched, laterally spaced rear sprockets rotatably mounted on said frame; a pair of matched, laterally spaced front sprockets rotatably mounted on said frame and disposed forwardly of said rear sprockets, each of said front sprockets being aligned in a common plane with a corresponding rear sprocket; an endless chain extending about each pair of corresponding sprockets; pedal means pivotally mounted on said frame at a forward point thereof, said pedal means comprising two elongate arm members each with a foot pedal mounted on its bottom end and each pivotally connected to the frame at top end of the arm member; a pair of connecting links each of which is connected to one of said elongate arm members at one end and to one of the endless chains at the other end of the link; a connecting device securing said one end of each link to its respective arm member, said connecting device permitting pivotal movement of the link in a vertical plane defined by the movement of the respective arm member and in a plane substantially perpendicular to said vertical plane; and transmission means connected to the rear wheel to drive the latter in response to rotation of said rear sprockets. A tricycle comprising a frame including means for mounting front and rear wheels and a steering mechanism, said steering mechanism including a central steering column and handlebar means pivotally mounted in said column; a seat mounted on said frame; a single rear wheel connected to said frame; means for driving said rear wheel; a pair of spaced-apart front wheels each connected to said frame by its own steering column and steerable by said steering mechanism; said mounting means including two, transversely extending, tiltable elongate members comprising leaf springs, each of which has the steering column of one of said front wheels pivotally connected to one end thereof and the steering column of the other of the front wheels pivotally connected to the other end thereof; means for tiltably connecting the centre of each transversely extending elongate member to said central steering column; and means for biasing said tiltable elongate members to a tilting or non-tilting position, said biasing means engaging at least one of said two tiltable elongate members.