Anchor bolt

Claim 1

An anchor bolt comprising: a. a cylindrical body having a reduced diameter portion near one end, and an outwardly flaring portion extending from said reduced diameter portion toward said one end, and b. a pair of expansion members mounted on said reduced diameter portion, said expansion members being separate and independent of each other, I. each of said expansion members being a curved resilient element having a portion which extends in a circumferential direction through an angle greater than 180*, whereby each of said members may be manually snapped over said reduced diameter portion and will remain thereon without the need for additional fastening means, and II. each of said expansion members having interlock means cooperable with interlock means on the other expansion member for transmitting movement of each of said expansion members, axially in both directions with respect to said body, to thE other of said expansion members, said interlock means permitting separation of said expansion members in a radial direction, and said interlock means including a finger extending peripherally from one longitudinal edge of each expansion member and comprising a part of said expansion member portion which extends for more than 180*, and a peripheral notch in the other longitudinal edge thereof spaced from both end edges of the expansion member and adapted to accommodate a like finger of the other expansion member, the corresponding side edges of each said finger and notch being parallel and each said finger and notch being about equal in width so that each said finger fits snugly within its respective notch.