Machine element or mechanism – Elements – Cranks and pedals
Patent
1978-08-23
1981-04-28
Kannan, Philip C.
Machine element or mechanism
Elements
Cranks and pedals
74750B, 185 10, G05G 114
Patent
active
042638208
ABSTRACT:
An apparatus for equalizing fluctuating torque and storing rotational energy received through a rotating input shaft. The input shaft is connected to a pair of circular drive plates rotatably mounted at opposite ends of an output drum. A plurality of drive shafts equally spaced from each other and the axis of the drum are rotatably mounted between circular end plates of the output drum. A pinion gear fixedly secured to one end of each drive shaft sequentially meshes with an arcuate rack carried by each of the drive plates. The lengths of the arcuate racks are sufficiently short so that the rack meshes with no more than two pinion gears at a time. As each of the drive shafts sequentially rotate, they wind a respective torsion spring which, in turn, rotates a second pinion gear. The second pinion gear meshes with a ring gear extending along the inside surface of the output drum. Ratchet mechanisms prevent unwinding of the torsion springs when the first pinion gears are not meshing with the racks. Thus, the input shaft sequentially winds each of several torsion springs while all of the torsion springs continuously apply a torque to the output drum. In another embodiment an annular sprocket is mounted on the outer surface of each drive plate to allow the drive plates to receive power through chains.
REFERENCES:
patent: 551867 (1895-12-01), Maggart et al.
patent: 2392250 (1946-01-01), Lucas
patent: 2459871 (1949-01-01), Cole
patent: 2484472 (1949-10-01), Simpson
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