US Pat. No. 10,214,912

KIT OF PARTS FOR MODULAR STAIRCASE

Lograr Group Limited, Au...

1. A kit of parts for building a staircase around a vertical elongate support member comprising:a plurality of attachment members, each attachment member of the plurality of attachment members comprising:
an aperture for receiving the elongate support member, the aperture being larger than a lateral dimension of the elongate support member to provide a gap between each attachment member of the plurality of attachment members and the elongate support member when received in the aperture, and
a fixing detail,
a plurality of locking elements, the plurality of attachment members and the plurality of locking elements adapted so that each locking element of the plurality of locking elements secures not more than one attachment member of the plurality of attachment members to the elongate support member by friction when received in the gap,
each attachment member of the plurality of attachment members adapted to engage an adjacent attachment member of the plurality of attachment members to align the plurality of attachment members laterally and form a hollow column secured around the elongate support member, and
a plurality of steps, each step of the plurality of steps adapted to be attached to one of the plurality of attachment members via the fixing detail.