192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1991-01-22
1991-11-05
Braun, Leslie A.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
192 8C, 192415, 188 2417, 188 826, F16D 4124
Patent
active
050625110
ABSTRACT:
In a brake actuator for bicycles of the type housed within the bottom bracket of the bicycle, an actuating lever passing through the bottom bracket has a head housed within a slot within an annulus surrouding the pedal crankshaft of the bicycle within the bottom bracket. The annulus is provided with a torque spring providing a clutching action which tends to rotate the annulus with the crankshaft upon backpedalling. The lever acts upon bearing surfaces at opposite ends of the slot in the annulus, responsive to rotation of the latter, so as to exert a clamping action on the crankshaft between the lever and the annulus. The arrangement may be made sufficiently compact that it can be assembled into bicycles having small diameter bottom brackets. The slot and head of the lever are configured so that the lever head may be inserted through the bottom bracket and the slot from the outside, and then locked in place by insertion of the crankshaft.
REFERENCES:
patent: 1488714 (1924-04-01), Schurmann
patent: 2075567 (1937-03-01), Benedek
patent: 3897857 (1975-08-01), Rodaway
patent: 4199046 (1980-04-01), Boyd
patent: 4246991 (1981-01-01), Oldakowski
patent: 4313530 (1982-02-01), Boyd
patent: 4603764 (1986-08-01), Boyd
patent: 4605110 (1986-08-01), Boyd
patent: 4825988 (1989-05-01), Nishimura
patent: 4905803 (1990-03-01), Boyd
patent: 4986400 (1991-01-01), Heller
Braun Leslie A.
Whitelaw Nicholas
LandOfFree
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