Patent ID: 7905063
Filing Date: 2011-03-15
Classification: B66C,E04G

Abstract:
1. A concrete structure and lifting mechanism therefor, comprising: a. an arcuate recess formed in the surface of the concrete structure; b. a pair of anchors embedded within the structure and extending across the recess in spaced relationship to one another, said anchors diverging outwardly relative to one another and defining annularly aligned openings disposed within the recess; c. a ring-shaped shackle having a hollow toroidal portion complimental with and received within the groove, said toroidal portion having slots extending thereacross into which the anchors extend, said slots having convergent outer surfaces complimentally engaged with the anchors and inner surfaces which diverge relative to the outer surfaces of the slots to enable the anchors to move into and out of the slots in a generally rectilinear path; and, d. an arcuate locking bolt slidably received within the toroidal portion of the body for select extension across the slots and through the annularly aligned openings defined by the anchors.