Front gear for bicycles

Details Front gear for bicycles Front gear for bicycles

1982-03-25

1984-06-12

Staab, Lawrence J.

Endless belt power transmission systems or components

Positive drive pulley or guide roll

And additional coaxial surface for engaging same belt in...

474161, 474902, 474903, F16H 5530

Patent

active

044539240

ABSTRACT:
A front gear for bicycles comprising a gear main body made of plastics and a metal core embedded in the gear main body. The metal core includes ribs embedded in support arms of the gear main body and a boss having a serrated bore for a crankshaft to fit in and embedded, at its outer peripheral portion other than the inner peripheral portion thereof, in an inner annular portion of the gear main body. One of the support arms has an opening in register with a positioning hole formed in one of the core ribs.

REFERENCES:
patent: 2720119 (1955-10-01), Sherman
patent: 3059491 (1962-10-01), Hoff et al.
patent: 3168836 (1965-02-01), Militana
patent: 3272027 (1966-09-01), Wayman
patent: 3469466 (1969-09-01), Heathwaite et al.
patent: 3469467 (1969-09-01), Seaman
patent: 3541873 (1970-11-01), Wolf et al.
patent: 3606497 (1971-09-01), Gilles
patent: 3666322 (1972-05-01), Pickron
patent: 4007621 (1977-03-01), Segawa
patent: 4106357 (1978-08-01), Segawa

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