Bicycle handlebard stem

Details Bicycle handlebard stem Bicycle handlebard stem

1989-06-22

1990-04-17

Luong, Vinh T.

Machine element or mechanism

Control lever and linkage systems

Elements

280279, 403191, 403367, 403271, 2281736, 745516, B62K 2112

Patent

active

049169700

ABSTRACT:
A stem assembly for securing the handlebars of a bicycle to the frame of the bicycle, which stem comprises a barrel and a head, the head being formed from a sheet metal stamping comprising a neck section and a handlebar clamping section. The neck section of the head is of generally annular cross-sectional configuration and is characterized by a longitudinal seam extending for the length of the neck. The seam of the neck section of the head is welded along the seam so as to impart to the stem resistance to torsional failure of the neck.

REFERENCES:
patent: 2487661 (1949-11-01), McCauley
patent: 3361455 (1968-01-01), Hussey et al.
patent: 3385615 (1968-05-01), Hussey
patent: 3722930 (1973-03-01), Humlong
patent: 4043688 (1977-08-01), Humlong
patent: 4113395 (1978-09-01), Pawsat et al.
patent: 4501435 (1985-02-01), McMurtrey
patent: 4537525 (1985-08-01), McMurtrey
patent: 4601483 (1986-07-01), McMurtrey
patent: 4676120 (1987-06-01), Borromeo

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