Pedal stroke adjuster for bicycles or the like

A pedal stroke adjuster attachment for a device which is operated by manual turning of a pair of foot pedals about an axis of rotation wherein the pedals are attached to crank arms which extend in opposite radial directions relative to the axis of rotation and wherein each crank arm has a proximal end situated at said axis of rotation and has a distal end with a pedal engaging opening thereat for enabling fastening of a foot pedal to the crank arm, said stroke adjuster attachment comprising:

• a linear track member having an inner face positioned to extend along a crank arm and having an opposite outer face and having a fastener receiving passage positioned to align with said pedal engaging opening of the crank arm, the track member further having a slot extending along said outer face thereof and having a plurality of detent seating openings which are spaced apart along said slot, said track member further having a pair of spaced apart blades, having parallel flat surfaces that face each other at opposite sides of an open region, parallel blades which extend outward from said inner face thereof to straddle the crank arm and block pivoting movement of said track member relative to the crank arm and which extend at a location which is away from said proximal end and said distal end of the crank arm when said track member is installed thereon;
• a threaded fastener for insertion into said fastener receiving passage of said track member and into said pedal engaging opening of the crank arm to secure said attachment to said crank arm;
• a slider member engaged by the track member and which is movable along said slot and having a threaded passage for enabling fastening of a foot pedal to the slider member;
• a releasable detent on said slider member for engaging any selected one of said detent seating openings to hold said slider member at a selected location along said track member;
• and
• a pair of set screws each extending from a separate one of said blades into a region between said blades in position to contact opposite locations on a crank arm which extends along said region, said set screws being aligned with each other and being spaced outward from said inner surfaces of said track member.