Bicycle
AssigneeNelson K. Harrison
InventorsGeorge Harrison, Nelson Harrison
Life of this patent
Estimating the term…
Abstract
A bicycle handlebar stem is made of two separate parts, a tubular shank and a gooseneck. This eliminates or substantially reduces long drilling operation for the stem and it simplifies the forging of the gooseneck. The gooseneck is shaped for forging thereof in a manner such that the meeting of the forging dies does not occur across the top of the stem, and the forging operation can forge identifying insignia on the stem top and/or form a recess of receiving an identification plate. Destruction of the indicia on the plate in the case of a stolen bicycle is easily detected. In order to inhibit commerce in such stolen bicycles the handlebar stem is mounted in the steering column in a manner that requires a special tool to remove it and to replace it by another.
Claims9
A bicycle including a wheeled frame, front wheel assembly pivotally connected to the frame, handlebar means for grasping by the operator, a handlebar mounting member keyed to the front wheel assembly and to which the handlebar means is secured for steering the bicycle, the improvement wherein:
- a. said member includes a bar portion formed with an opening recess,
- b. an identification plate fixedly inset in said recess and bearing identification indicia on its outwardly facing side,
- c. said recess defining a floor surface covered by said plate and said floor surface bearing identification data,
- d. said plate side and the surrounding bar surface being subjected to mutilation by efforts to tamper with said plate indicia, and said plate side and the bar surface surrounding it are disposed on the bicycle such that when the bicycle is parked upright, said plate side and its surrounding surface present themselves for ready inspection for detection of such mutilation.
A bicycle handlebar assembly including a tubular handlebar stem to which a handlebar is attachable, a front steering fork tube into which the tubular stem extends, means including a wedge for locking the two in a required position, means for moving the wedge into its locking position including a wedge bolt extending lengthwise through the tubular stem, characterized in that there is provided a nut threaded on the bolt and movable lengthwise of the bolt by turning of the bolt, said bolt moving the nut towards and away from the wedge into and out of position bearing against the wedge, so that upon movement of the nut in one direction it moves the wedge into wedging position and upon movement of the nut in the opposite direction it receeds from the wedge leaving the wedge in its wedging position so that operation of the wedge bolt to move the nut in said opposite direction is ineffective to release the wedge and ineffective to allow withdrawal of the tubular handlebar stem from the front steering fork tube.
Dependencies are inferred from the claim text.