Bullet bicycle pedal

US4892009A · kind A · utility

Inventor

• Peter Gibson · Sydney, AU

Key dates

• Filing date: Jun 20, 1988
• Grant date: Jan 9, 1990
• Expiry date: Jun 20, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/217
• WIPO field: Transport
• WIPO sector: Mechanical engineering

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.