Land vehicles – Wheeled – Occupant propelled type
Patent
1995-01-05
1996-09-24
Hurley, Kevin
Land vehicles
Wheeled
Occupant propelled type
70233, B62K 1900, B62H 500
Patent
active
055583490
ABSTRACT:
A polygonal frame self-locking bicycle includes a head tube mounting a wheel-containing front fork, a down tube rigidly connected between the head tube and a pedal crank housing, a seat tube mounting a rear fork and wheel and rigidly connected to the crank housing and a top tube locking with and demountable from at least one of the head and seat tubes. Preferably, a top tube end is key-locked to the seat tube and the other end affixed to a clamping cylinder around the head tube. Loosening of the clamping cylinder permits pivoting an unlocked top tube to open a space between the seat and head tubes. The demounted top tube forms a frame opening that can be leaned past a vertical pole and the top tube remounted and relocked locking the frame about the pole.
REFERENCES:
patent: 3774421 (1973-11-01), Stephens, Jr.
patent: 3814462 (1974-06-01), Kelly
patent: 4252335 (1981-02-01), Brenner
patent: 4417745 (1983-11-01), Shomo
patent: 5149112 (1992-09-01), Nauman et al.
Advertisement flyer entitled "The Bicycle Torque Coupling System" S and S Machine, 9334 Viking Place, Roseville, CA 95747 (two sides), Aug. 1993.
Hurley Kevin
MacDonald Thomas S.
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