Lifting anchor assembly for precast concrete structures
AssigneeMidwest Concrete & Masonry Supply, Inc.
InventorMarinus Hansort
Life of this patent
Estimating the term…
Abstract
A lifting anchor assembly that is configured to be embedded in a tilt-up concrete structure includes an anchor member that has a central portion configured to engage a lift apparatus and a pair of legs that extend downward from the central portion. A lower portion of each of the pair of legs includes a curved section configured to engage within a concrete structure during its forming process. A spacer may be selected to attach at an end portion of each the pair of legs, where the spacers each extend downward from the anchor member and rest on a floor surface of a concrete form to support the anchor member at a desired spacing from the floor and upright within the concrete structure that is cast in the concrete form.
Claims20
A lifting anchor assembly comprising:
- an anchor member having a central portion configured to engage a lift apparatus and a pair of legs that extend from the central portion;
- wherein an upper portion of each leg of the pair of legs extends linearly from the central portion and is disposed in a common plane with the other leg of the pair of legs;
- wherein a lower portion of each leg of the pair of legs includes a retention feature that is configured to divert a load path applied by the lift apparatus outside of a linear extent of the upper portion of the respective leg;
- wherein an end portion of each leg of the pair of legs extends linearly from the lower portion of the respective leg to dispose the end portion in parallel alignment with the end portion of the other leg and in general alignment with a floor surface of a concrete form;
- wherein the retention feature includes an arcuate curved section of the anchor member that extends out of the linear extent of at least one of the upper portion and the end portion of the respective leg;
- a pair of spacers each having a sleeve portion removably engaged at the end portion of one leg of the pair of legs;
- and
- wherein the pair of spacers each include at least two protrusions that are coupled with and extend downward from the sleeve portion at a length that is configured to rest on the floor surface of the concrete form to support the anchor member upright and suspended within the concrete form when forming a tilt-up concrete structure in the concrete form.
A lifting anchor assembly configured to be embedded in a tilt-up concrete structure, said lifting anchor assembly comprising:
- an anchor member having a central portion configured to engage a lift apparatus and a pair of legs that extend downward from the central portion;
- wherein upper portions of the pair of legs are disposed in a common plane;
- wherein lower portions of the pair of legs include a retention feature that is configured to divert a load path applied by the lift apparatus outside of a linear extent of the upper portion of the respective leg;
- wherein end portions of the pair of legs extend linearly from the lower portion of the respective leg to dispose the end portions in parallel alignment with each other and generally perpendicular orientation to the common plane;
- and
- wherein the retention feature includes an arcuate curved section of the anchor member that extends out of a linear extent of at least one of the upper portion and the end portion of the respective leg and is configured to secure the anchor member in the tilt up concrete structure.
A method of forming a lifting anchor assembly configured to be embedded in a concrete structure, said method comprising:
- providing an elongated section of metal bar stock;
- bending the elongated section to form an anchor member having a central portion for engaging a lift apparatus and a pair of legs that extend downward from the central portion in a generally common plane;
- and
- wherein a lower portion of each leg of the pair of legs includes an arcuate curved section that is configured to engage within a cast concrete structure;
- wherein an end portion of each leg of the pair of legs extends orthogonally out of the common plane, such that the arcuate curved sections and end portions are configured to secure the anchor member in the cast concrete structure;
- selecting a pair of spacers with spacing protrusions having a desired length from a plurality of pairs of spacers with spacing protrusions with different lengths;
- engaging the pair of spacers with the end portions of the pair of legs;
- and
- wherein the desired length of the selected pair of spacers is configured, when the spacing protrusions are resting on a floor surface of a concrete form, to support the anchor member upright and suspended within the concrete form for the central portion of the anchor member to be at or near an upper surface of the cast concrete structure for engaging the lift apparatus.
Dependencies are inferred from the claim text.