Machine element or mechanism – Elements – Cranks and pedals
Patent
1988-06-20
1990-01-09
Luong, Vinh T.
Machine element or mechanism
Elements
Cranks and pedals
745944, 36131, G05G 114, A43B 500
Patent
active
048920096
ABSTRACT:
A bicycle pedal has two opposed tracks defined by a set of longitudinally contiguous surfaces. Each track is bilaterally symmetric with a central convex surface, two adjacent co-planar surfaces and two perpendicular side surfaces. Each side surface extends dihedrally inward, above a co-planar surface. Each track is slightly wider at the free end of the pedal than the end fixed to the crank arm. A shoe cleat has a bottom central concave surface, adjacent co-planar surfaces and side diheral surfaces which mate with the corresponding pedal track surfaces in longitudinal engagement. A fully sculptured lead is attached to the free end of the pedal which has an exterior flush with the central convex surface and adjacent co-planar surfaces of both pedal tracks. The lead tapers axially to an apex co-linear with the longitudinal axis of the pedal and approximates an oblate half ellipsoid about this axis with fins lying between and in front of the opposed pedal tracks.
REFERENCES:
patent: 550409 (1895-11-01), Hanson
patent: 598325 (1898-02-01), McIntyre
patent: 1393256 (1921-10-01), Wright
patent: 2582551 (1952-01-01), Malherbe
patent: 3964343 (1976-06-01), Lauterbach
patent: 4214384 (1980-07-01), Gonzalez
patent: 4538480 (1985-09-01), Trindle
patent: 4570363 (1986-02-01), Annovi
patent: 4685351 (1987-08-01), Pegg
patent: 4716784 (1988-01-01), Schlotterer
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