Unicycle

• US 4,062,558 A
• Filed: 07/19/1976
• Issued: 12/13/1977
• Est. Priority Date: 07/19/1976
• Status: Expired due to Term

• Current Assignee: David Wasserman
• Original Assignee: David Wasserman
• Inventors: Wasserman, David
• Primary Examiner(s): Peters, Jr., Joseph F.
• Assistant Examiner(s): Siemens, Terrance L.
• Application Number:
  US05/706,227
• Time in Patent Office: 512 Days
• Field of Search: 280/205, 280/200, 280/252
• US Class Current: 280/205
• CPC Class Codes: B62K 1/00 Unicycles

Abstract

This disclosure pertains to a one wheeled vehicle rotatably affixed to a yoke. One arm of the yoke is provided with a stationary foot rest. The other arm of the yoke contains a rack which when reciprocated operates a gear train causing the wheel to rotate. A platform is secured to the uppermost portions of the rack and is biased upwardly by a spring urging the rack in an uppermost position. A pole extends upwardly from the yoke providing steering control to the apparatus and a balancing aid to the user thereof.

Claims

1. A unicycle comprising a yoke, said yoke having a pair of arms, a wheel, a pole, said wheel having an axle, said axle being journalled to the arms of said yoke, said pole having one end thereof fixedly secured to said yoke, the longitudinal axis of said pole extending at right angles to the longitudinal axis of said axle, a platform, said platform residing in a plane, said plane being maintained perpendicular to said longitudinal axis of said pole, a shaft, said shaft having one end thereof fixedly secured to one of said pair of arms and extending outwardly therefrom, means to slidably support said platform along a line, said line being disposed parallel to said longitudinal axis of said pole, means to rotate said wheel when said platform is displaced along said line, said means to rotate including a rod, a rack, one end of said rod being fixedly secured to said platform, the other end of said rod being fixedly secured to one end of said rack, a gear train, said gear train having an input gear and and an output gear, the teeth of said input gear meshingly engaging the teeth of said rack, a pinion, said pinion fixedly secured and co-axially aligned with said axle, the teeth of said output gear meshingly engaging the teeth of said pinion. and means to bias said platform in a furthestmost position from said axle.

2. The unicycle as claimed in claim 1 wherein said gear train and said rack and said pinion each have pitch diameters causing a point on the periphery of said wheel to be circumferentially displaced a distance ten times greater than the displacement of said platform along said line.

3. The unicycle as claimed in claim 1 further comprising a housing, said housing fixedly secured to the other of said pair of arms, said gear train being journalled to the walls of said housing, said rod passing through an opening in said housing.

4. The unicycle as claimed in claim 3 wherein said means to bias comprises a helical spring, one end of said spring being fixedly secured to an interior surface of said housing, the other end of said spring being fixedly secured to said rack.

5. The unicycle as claimed in claim 1 further comprising a rubber-like pad, said rubber-like pad being fixedly secured to said platform on a lateral surface thereof disposed furthestmost from said axle.