Stem for interconnecting a handlebar and a head tube of a bicycl

Details Stem for interconnecting a handlebar and a head tube of a bicycl Stem for interconnecting a handlebar and a head tube of a bicycl

1992-06-15

1993-01-26

Bonck, Rodney H.

Machine element or mechanism

Control lever and linkage systems

Elements

403120, B62K 2114

Patent

active

051814366

ABSTRACT:
A stem for interconnecting a handlebar and a head tube or bicycle includes an upright tube and a connecting tube pivoted to two lug portions of the upright tube. Each of the lug portions of the upright tube has a torsional spring mounted in a through bore of the lug portion and a positioning disc attached to the outside face of the lug portion. The positioning disc has a plurality of adjusting holes circumferentially formed. The torsional spring has a first end engaging the connecting tube and a second end engaging one of the adjusting holes of the positioning disc. The torsional spring can absorb the shock wave produced from the front wheel of a bicycle. The angle between the connecting tube and the upright tube can be varied by inserting the second end of the torsional spring into different adjusting holes of the positioning disc.

REFERENCES:
patent: 1948788 (1934-02-01), Goldberg et al.
patent: 4939950 (1990-07-01), Girvin

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