Patent ID: 7269916

Claim:
A sole for anti-slipping shoes having a tread comprised by a plurality of projections on an underside of the sole, anti-slipping means to increase adherence to the ground, said anti-slipping means comprising a plate having projections on only one side thereof, means mounting said plate on said sole for vertical swinging movement about a first axis extending transversely of the sole and for rotation about a second axis transverse to said first axis between two rotated positions 180° apart, said plate having a plurality of openings therein each adapted to receive one of said projections on the underside of the sole in either said rotated position of said plate, whereby said plate may be swung away from the sole, rotated 180° and returned to the sole, with said projections on the underside of the sole filling each of said holes in either of the two positions of the plate against the sole.