Machine element or mechanism – Control lever and linkage systems – Elements
Patent
1998-07-13
2000-05-09
Luong, Vinh T.
Machine element or mechanism
Control lever and linkage systems
Elements
745513, 280279, B62K 2112
Patent
active
060588004
ABSTRACT:
A bicycle handlebar stem for attaching a handlebar to the steering tube on a bicycle includes a continuous wall section which extends continuously and completely around the steering tube from one side to the other of a tubular central portion of the stem without any gaps or spaces therebetween. A slot in the center of the tubular central portion of the stem provides a means for reducing the diameter of the central opening formed by the continuous wall section for attaching and tightening the stem onto the end of the steering fork. An arcuate-shaped cover member on the opposite end of the stem, the cover member and stem and having cooperating semi-cylindrical clamping surfaces, provides a means for attaching and tightening the handlebar onto the stem. The cover member is attached to the stem by virtue of a mechanical hinge and a single fastener.
REFERENCES:
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patent: 4323263 (1982-04-01), Cook et al.
patent: 5273302 (1993-12-01), Ureel
patent: 5373757 (1994-12-01), Bigall
patent: 5400676 (1995-03-01), Kao
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patent: 5791671 (1998-08-01), Tang et al.
patent: 5881606 (1999-03-01), Roddy
Pending patent application: Bicycle Handlebar Attachment Device; U.S. application No. 08/806,202, Roddy, Feb. 26, 1997.
Oct. 1995 issue BMX PLUS! magazine: cover page and 11 select pages (7 unidentified and pages 25, 33, 80,82).
Kalloy Industrial Co., Ltd. drawing, No. 85,02,16.
Boyle James F.
Luong Vinh T.
Trek Bicycle Corporation
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