High tech footwear
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 26, 1991
Grant Date -
N/A
app pub date -
Apr 13, 1989
filing date -
Apr 13, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A shoe, boot, sneaker, etc. incorporates a foot-actuated pump which is connected to one or more expandable air bladders located in portions of the footware where contour fitting is desirable. Walking or running actuates the pump. An adjustable relief valve connected to the bladder releases air when a preselected pressure is exceeded. The relief valve is accessible externally for easy adjustment by the wearer. Regardless of the external ambient temperature or degree of user activity, the pump, in conjunction with the relief valve, maintains a preselected pressure and assures that the selected fit between the user's foot and footware is maintained at all times.
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