Machine element or mechanism – Mechanical movements – Oscillation or reciprocation to intermittent unidirectional...
Patent
1983-02-02
1986-03-11
Staab, Lawrence J.
Machine element or mechanism
Mechanical movements
Oscillation or reciprocation to intermittent unidirectional...
74142, 74833, 192 28, 192 64, 280251, 280255, B62M 104
Patent
active
045746494
ABSTRACT:
Propulsion and speed change mechanism for lever propelled bicycles having a pair of propulsion levers 4, each of which is built in one piece with a speed change arm 3 and mounted in each side of the main shaft portion 2 at the bottom of the bicycle frame 1. A rear axle 5 and a hub 6 is mounted on the rear shaft portion 2'. A one-way clutch mechanism has roller-type free wheels 11a installed at both ends of the rear axle. Chains 7", the ends of which may be connected together with a see-saw cable 7', are entrained around gears 7 and guide rollers 13. The free ends of the chains are connected by connecting bars 14 having pins to the speed change arm 3. Pivotally mounted members 15 of triangular shape and a cam bar 17 operated by a speed control knob 18 are used to change the effective length of the arm for speed control.
REFERENCES:
patent: 3759543 (1973-09-01), Clark
patent: 4077648 (1978-03-01), Seul
patent: 4161328 (1979-07-01), Efros
patent: 4272096 (1981-06-01), Efros
patent: 4300784 (1981-11-01), Efros
patent: 4421334 (1983-12-01), Efros
Hallenbeck R.
Lukacher M.
Staab Lawrence J.
Yim B. D.
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