Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7712566 | Bicycle transmission A bicycle transmission assembly that is mountable to a bottom bracket shell of a bicycle frame. The bicycle transmission assembly includes an input crank assembly, an output chainring, a planetary gear mechanism, a control system and a mounting system. The input cra... | 05/11/2010 |
| 7607507 | Bicycle bottom bracket assembly A bottom bracket assembly for a bicycle is provided. The bottom bracket assembly may comprise a left bearing, bottom bracket shell and a right bearing. The bottom bracket shell may be threadless and have beveled surfaces for mounting the left and right bearings onto... | 10/27/2009 |
| 5941333 | Bicycle with a planetary-gear-train type transmission and an auxilliary electrical transmission A bicycle includes a pedal-activated spindle, a sprocket-mounting sleeve and a front sprocket sleeved fixedly on the sleeve. A planetary gear train interconnects the spindle and the sleeve, thereby rotating the sleeve at a speed larger than that of the sp... | 08/24/1999 |
| 4591018 | Tractor A tractor comprising driven front and rear wheels, and a front and rear lifting device. The front wheels are in sets of two wheels mounted on king pins so as to be steerable through an angle of one hundred, twenty-five degrees or more. A divided track rod... | 05/27/1986 |
| 3983951 | Front end drive mounting A mounting for the front wheels of an automobile in which the wheels are driven by spherical gears, and in which the wheels may be turned about a vertical axis to a position at 90° to the normal straight forward position at least toward one side of the a... | 10/05/1976 |
