Concrete Anchor

摘要

An anchor particularly adapted to be embedded into a concrete construction for suspension of a ceiling panel, duct or the like, includes a base which receives inserts that have an axial threaded bore. The base is open at its lower end and can receive a threaded rod by virtue of ratcheting inserts received within the base. The inserts and base are particularly shaped to prevent jam and ease of insertion of the rod in the anchor. The anchor also has a head flange that sits above a plurality of fasteners secured to the anchor which is used to simultaneously drive the fasteners into a form for the concrete member. The fasteners are connected to the anchor extending in generally parallel and spaced relation to the anchor. The fasteners can be held by a support or sleeve-like holder which surrounds at least a portion of the base of the anchor or they can be attached to the base of the anchor. The fasteners project downwardly through the bottom of the anchor for driving into the form board.

主权项

1. A connection between a rod, an anchor, and a first structural member, the connection comprising:
a. the first structural member; b. the rod; and c. the anchor, connecting the first structural member to the rod, the anchor including a housing, the housing having a bottom, a top and a longitudinal central axis that travels through the bottom and the top, the housing having an insert receiving bore that opens through the bottom of the housing, the insert receiving bore having a narrowing lower portion closer to the bottom than the top of the housing; and wherein a plurality of inserts are disposed in the insert receiving bore and contained securely within the housing, each of which has a base bore interfacing surface that interfaces with the narrowing lower portion of the insert receiving bore of the housing, wherein each insert has a concave inner surface and the plurality of concave inner surfaces form a generally tubular interior rod receiving bore that receives a portion of the rod, and the rod, inserts and the housing are formed such that when the rod is received in the interior rod receiving bore and engages the inserts and moves toward the bottom of the housing, the inserts will be pulled toward the bottom of the housing, and the narrowing in the lower portion of the insert receiving bore causes a constriction of the insets about the rod forcing them to grasp and hold the rod, and when the rod is inserted into the interior rod receiving bore and moves toward the top of the housing, the inserts can be moved away from each other and from the longitudinal, central axis of the housing, allowing the rod to be inserted farther into the housing and towards the top of the housing.