US 7,490,418 B2
Footwear with manually extendable spikes
Michel Obeydani, 235-11215 Jasper Avenue, Edmonton, Alberta T5K 0L5 (Canada)
Filed on Jun. 30, 2006, as Appl. No. 11/479,720.
Prior Publication US 2008/0016721 A1, Jan. 24, 2008
Int. Cl. A43C 15/02 (2006.01)
U.S. Cl. 36—61 6 Claims
OG exemplary drawing
 
1. A footwear apparatus with retractable spikes comprising: a shoe having a heel portion, a sole portion and a side wall portion; a gear assembly mounted within the heel portion of the shoe, the gear assembly providing an actuator gear communicating with a plurality of drive gears; a plurality of threaded couplings fixedly engaged with the sole portion; a plurality of spikes, each one of the spikes threadedly engaged with one of the threaded couplings; a plurality of flexible drive shafts, each one of the drive shafts fixed axially at a distal end thereof with one of the spikes, and axially at a proximal end thereof with one of the drive gears; a flexible actuator shaft engaged axially with the actuator gear, the actuator shaft terminating with an actuator knob for manual rotation thereof, whereby such rotation of the actuator knob and actuator shaft transfers rotation to the spikes for extending, and for retracting within the threaded couplings.