Bicycle stem with enclosed steering tube clamp

Details Bicycle stem with enclosed steering tube clamp Bicycle stem with enclosed steering tube clamp

1998-09-09

2000-06-13

Browne, Lynne H.

Joints and connections

Interfitted members

Clamped members

403344, 403290, 745513, 280280, B60B 2706

Patent

active

060741236

ABSTRACT:
A steering tube clamp and stem assembly for a bicycle or other cycle in which the steering tube clamping parts are concealed inside a stem tube which extends away from the rider. The clamping assembly employs an axially extending cut and intersecting arcuate cuts in a wall of a sleeve which connects to the steering tube and a pair of spaced lugs which are integrally formed with the steering tube sleeve and extend in parallel into the stem tube. A clamping screw head is accessible through an aperture in the wall of the stem tube. The stem tube is welded to the steering tube sleeve and to two additional outside lugs which parallel the concealed lugs to minimize stresses in a welded connection of the stem tube to the sleeve.

REFERENCES:
patent: 4772153 (1988-09-01), Huang
patent: 5193930 (1993-03-01), Chi
patent: 5426996 (1995-06-01), Chang

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