Shoe with retractable spike assembly

Details Shoe with retractable spike assembly Shoe with retractable spike assembly

1993-01-21

1994-04-05

Sewell, Paul T.

Boots, shoes, and leggings

Antislipping devices

Disengaging

36127, 36 29, A43C 1500

Patent

active

052993698

ABSTRACT:
A sport shoe having a plurality of pneumatically actuated, rotatable spikes that are mounted in open ended chambers formed in the shoe sole, each spike having a narrow tip. Each spike is constrained for movement between extended and retracted position. A stop is provided in each chamber for holding the spikes in their extended positions, the spike tips project outwardly from the chambers when in their extended positions. A pneumatically actuated bladder in each chamber when inflated, drives the spikes to their extended positions against the stops. Each spike is rotated beyond a vertical axis or centerline that is perpendicular to the axis of rotation of that spike. A spring operatively connected to each spike rotates the spikes to their retracted positions within the chambers when the bladders are deflated.

REFERENCES:
patent: 3716931 (1973-02-01), Loudermilk
patent: 3793751 (1974-02-01), Gordos
patent: 4375729 (1983-03-01), Buchanen, III
patent: 4821434 (1989-04-01), Chein
patent: 4825562 (1989-05-01), Chuang
patent: 4873774 (1989-10-01), Lafever

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