Machine element or mechanism – Elements – Cranks and pedals
Patent
1982-09-20
1986-04-22
Grosz, Alexander
Machine element or mechanism
Elements
Cranks and pedals
192 5, 280260, G05G 114, B62M 102, F16D 4124
Patent
active
045834229
ABSTRACT:
A chainwheel is supported on a pedal crank in a bicycle, in which lost motion is provided about the axis of the crank in order to prevent lock up when using a pedal crankshaft operated brake, by supporting the inner periphery and one side of the chain wheel on a chain wheel carrier, and taking up play on the other side of the chain wheel by using a nut to deform a resilient washer into a cone to prevent movement of the chain wheel relative to the crank other than about its axis. The nut may be an inner race of a crankshaft bearing if the pedal crank is integral with a pedal crankshaft. A spring controlling relative movement of the chain wheel about the crank is made progressive by causing it to wrap onto a cylindrical surface concentric with the crankshaft axis.
REFERENCES:
patent: 627597 (1899-06-01), Scott
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patent: 4201120 (1980-05-01), Segawa
patent: 4260044 (1981-04-01), Foster
patent: 4261449 (1981-04-01), Foster
patent: 4309043 (1982-01-01), Brown
patent: 4355706 (1982-10-01), Pan
patent: 4441383 (1984-04-01), Segawa
Grosz Alexander
Luong Vinh
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