Patent ID: 6269906
Filing Date: 2001-08-07
Classification: B60R,E06C

Abstract:
A twist lock step in combination with an implement attachment mounting wall for supporting a person comprising:first and second legs joined at first ends thereof and resiliently urged to a rest position in a generally V shape;a first lock tab at a second end of the first leg having a first flange forming a first shoulder facing the first end of the first leg;a second lock tab at a second end of the second leg having a second flange forming a second shoulder facing the first end of the second leg;the first lock tab being insertable through a first slot of a mounting wall of an implement attachment and movable in a twisting movement to lock the first shoulder on an opposite side of the mounting wall from the first leg and the second lock tab being movable, sequentially to a second slot to lock the second shoulder on an opposite side of the mounting wall, the mounting wall of the implement attachment having the first slot oriented along a first axis to receive the first flange of the first leg and to permit the first leg to rotate for the twisting movement with the first shoulder of the first leg on the opposite side of the mounting wall from the first leg, and the second slot extending at a different angle from the first slot to receive the second flange of the second leg with the first leg rotated to a desired position and the second leg moved relative to the first leg against the resilient urging, and further comprising the first slot being formed in a pattern with a slot periphery cut extending to provide a clearance opening extending laterally from adjacent a first end of the slot, the clearance opening having a clearance radius less than a radius of an outer side edge of the first flange from a central axis of the first leg to capture the first shoulder of the first flange behind the mounting wall when the first leg is rotated; anda surface joining the slot periphery cut and extending toward an axis of the clearance radius for contacting the stem supporting the first flange on the first leg after rotation of the first leg to a position where the second lock tab of the second leg can be inserted into the second slot.