Running shoe
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United States of America Patent
Stats
-
Jan 8, 1985
Grant Date -
N/A
app pub date -
Jun 1, 1983
filing date -
Jun 1, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A running shoe has a longitudinal slot in the sole extending from its back edge into the arch region and dividing the shoe sole into upper and lower segments. A spring wire in this slot decreases the velocity of the heel impact and then, as the runner's weight shifts forward onto the ball and toes of the foot, launches the runner into a comfortable stride and reduces stress.
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