Stair forming method and apparatus
AssigneeSRB Construction Technologies Pty. Ltd.
InventorRobert Sladojevic
Life of this patent
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Abstract
A stairway forming system includes a plurality of stacked, elongate stair riser form carriers, the carriers being longitudinally displaceable relative to one another. An anchoring unit anchors at least a lowermost riser form carrier in position relative to a substrate. A positioning assembly is attached to at least one of the riser form carriers and cooperates with the remaining riser form carriers for displacing the carriers in unison relative to one other to adopt a staggered operative configuration approximating an angle of the stairway to be formed.
Claims14
A stairway forming system comprising
- a plurality of stacked, elongate stair riser form carriers, each riser form carrier having a longitudinal axis, the riser form carriers being displaceable relative to one another in a direction parallel to the longitudinal axes;
- an anchoring unit for anchoring at least a lowermost riser form carrier of the plurality of rise form carriers in position relative to a substrate;
- a positioning assembly which is attached to at least one of the riser form carriers and which cooperates with the remaining riser form carriers for displacing the riser form carriers, above the lowermost riser form carrier, in unison relative to one another so that the riser form carriers adopt a staggered operative configuration approximating an angle of a stairway to be formed;
- and
- a movement limiting arrangement carried by at least one of the riser form carriers for limiting travel of the positioning assembly when it is displaced to an operative position, the movement limiting arrangement being adjustable for adjusting a limit of travel of the positioning assembly to enable stairways of differing angles to be formed.
A method of forming a stairway, the method comprising
- attaching a stack of elongate stair riser form carriers to a substrate, a stair riser form being attached to a distal end of each carrier riser form;
- arranging the riser form carriers on the substrate so that, initially, all the riser form carriers are in a first, inoperative configuration relative to one another;
- displacing the riser form carriers, above a lowermost riser form carrier of the plurality of riser form carriers, in unison relative to one another so that the riser form carriers are moved to a second, operative configuration relative to one another in which the riser form carriers adopt a step shaped, staggered configuration relative to one another;
- clamping at least two of the riser form carriers together after the riser form carriers have been displaced to retain the riser form carriers in the operative configuration;
- and
- limiting travel of the form carriers relative to one another from the inoperative configuration of the riser form carriers to the operative configuration, the limit of travel of the riser form carriers being adjustable to enable stairways of differing angles to be formed.
Dependencies are inferred from the claim text.