US 9,809,275 B2
Pedal-driven vehicle crank
Willem den Boer, Brighton, MI (US); and Paul R. Metcalfe, Solon, OH (US)
Assigned to Willem den Boer, Brighton, MI (US)
Filed by Willem den Boer, Brighton, MI (US)
Filed on Feb. 17, 2016, as Appl. No. 15/46,279.
Application 15/046,279 is a continuation in part of application No. 13/962,142, filed on Aug. 8, 2013, granted, now 9,403,576.
Claims priority of provisional application 62/117,882, filed on Feb. 18, 2015.
Prior Publication US 2016/0159430 A1, Jun. 9, 2016
Int. Cl. B62M 3/16 (2006.01); B62M 1/36 (2013.01); G01L 3/02 (2006.01); G01L 3/24 (2006.01); B62M 3/00 (2006.01); B62M 3/06 (2006.01)
CPC B62M 3/16 (2013.01) [B62M 1/36 (2013.01); B62M 3/00 (2013.01); B62M 3/06 (2013.01); G01L 3/02 (2013.01); G01L 3/24 (2013.01); Y10T 74/2168 (2015.01)] 14 Claims
OG exemplary drawing
 
1. A crank assembly for a pedal-driven vehicle, comprising:
a first member that rotates about a crank axis of the pedal-driven vehicle;
a second member rotationally coupled to the first member and configured to pivot clockwise and counterclockwise about the first member via a member pivot, the second member configured to receive a pedal at a pedal interface;
a spring to bias the second member toward a default orientation relative to the first member when the second member pivots clockwise relative to the first member and to bias the second member toward the default orientation relative to the first member when the second member pivots counterclockwise relative to the first member; and
a rotary sensor coupled to the first member, the rotary sensor configured to measure rotation of the second member relative to the first member.