Interior underpin bracket and system and method for elevating a structure
AssigneeBracken Engineering, Inc.
InventorsWilliam Bracken, Jose Busquets
Life of this patent
Estimating the term…
Abstract
Various embodiments of subsurface support devices, interior underpin brackets, and systems and methods for elevating a settled or settling structure are disclosed. One embodiment comprises an interior underpin bracket. One such bracket comprises: a support shaft having a bore adapted to receive an underpin pipe; and at least two support arms pivotally fixed to the support shaft, the support arms adjustable between a retracted position in which the support arms are disposed parallel to the support shaft and an extended position in which the support arms are disposed perpendicular to the support shaft.
Claims18
An interior underpin bracket comprising:
- a support shaft having a bore adapted to receive an underpin pipe;
- and
- at least two support arms pivotally fixed to the support shaft, the support arms adjustable between a refracted position in which the support arms are disposed parallel to the support shaft and an extended position in which the support arms are fixedly disposed perpendicular to the support shaft to engage an underside of a slab and provide subsurface support.
A subsurface support apparatus for elevating a structure, the subsurface support apparatus comprising:
- a support shaft having a first open end, a second open end, and a bore for receiving an underpin pipe;
- at least two retractable support arms pivotally fixed to the support shaft near the first open end;
- and
- an adjustable collar disposed on the support shaft between the retractable support arms and the second open end and pivotally attached to the retractable support arms, the adjustable collar being adjustable on the support shaft to pivot the support arms between a retracted position and a fixed extended position with the retractable support arms generally perpendicular to the support shaft to provide uniform subsurface support to an underside of a structure to be elevated.
A method for elevating a cast-in-place slab, the method comprising:
- drilling a hole in a cast-in-place slab;
- installing an underpin pipe in a subsurface material underneath the cast-in-place slab;
- removing the subsurface material around the hole;
- installing a bracket having retractable support arms on the underpin pipe with the retractable support arms in a refracted position;
- extending the retractable support arms;
- and
- fixing the retractable support arms in an extended position to provide support to the cast-in-place slab.
Dependencies are inferred from the claim text.