Trilateral track bicycle pedal

US5159853A · kind A · utility

Inventor

• Peter Gibson · Sydney, AU

Key dates

• Filing date: Feb 20, 1992
• Grant date: Nov 3, 1992
• Expiry date: Feb 20, 2012

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 bilaterally symmetric tracks which are substantially identical. Each track is bounded by an axially disposed central concave surface and two substantially parallel apposed side surfaces. Each side surface extends inward, in equidistant juxtaposition with the central convex 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 with a longitudinally disposed central concave surface and adjacent flat lateral surfaces as well as upper bilateral cleat side surfaces. The bottom central concave and two upper bilateral surfaces mate with the corresponding pedal track surfaces in an engagement parallel to the pedal axis. Attached to the free end of the pedal is a lead which has an exterior flush with the central convex surfaces of both pedal tracks. The lead tapers bilaterally into fins lying in front of the area between the two opposed pedal tracks. The cleat bottom concave surface, when in contact with the pedal lead, will bias the lead into one of two opposed equilibrium positions wherein the cleat bottom flat lateral surfaces rest on the pedal lead bilateral fins. The lead guides …