Ski boot with release mechanism
 A release member is pivotally mounted on the heel portion of a ski boot for swinging about a transverse horizontal axis. Control mechanism normally holds the release member in fixed relationship relative to the remainder of the boot for fitting in a safety ski binding but is actuated by force in excess of a predetermined force being exerted on the boot to unlock the release member to allow it to swing so as to release the ski boot from the binding. 
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Bernhard
Kirsch