Handlebar to steerer clamping device for bicycles

Details Handlebar to steerer clamping device for bicycles Handlebar to steerer clamping device for bicycles

1993-08-13

1996-05-21

Bonck, Rodney H.

Machine element or mechanism

Control lever and linkage systems

Elements

403371, B62K 2116, B25G 320

Patent

active

055178782

ABSTRACT:
A lightweight handlebar/steerer locking mechanism for use on road and mountain bicycles. The invention provides higher fatigue and impact resistance, lower material and production costs, and improved adjustability, compared to prior art designs, all at a reduced weight.
The superior structural performance of the invention is provided by a unique, 3-dimensional, sliding, compression wedge. The 3-dimension wedge improves the stress distributions within the device my introducing a more uniform wedging (locking) action on the circumference of the steerer tube. This allows the mating parts to be designed lighter, thereby reducing the total weight of the assembly. The configuration of the design also lends itself to modern metal working methods. This further improves the strength of the parts by increasing the material allowables. Also, these metal working operations help to reduce material scrap, thus reducing material costs.
The invention improves the adjustability of the handle-bar assembly by allowing the locking and un-locking function to be accomplished by hand, without any assistance from a special tool. The locking function is activated and de-activated by the twisting of a tightening cap. This can be done by hand, from the sitting position of the bicycle rider.

REFERENCES:
patent: 618639 (1899-01-01), Bullard
patent: 757154 (1904-04-01), Tate
patent: 4405251 (1983-09-01), Kolchinsky et al.

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