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Concrete anchor

  • US 9,945,115 B2
  • Filed: 07/18/2016
  • Issued: 04/17/2018
  • Est. Priority Date: 10/08/2013
  • Status: Active Grant
First Claim
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1. A connection between a rod, an anchor, and a first structural member, the connection comprising:

  • a. the first structural member;

    b. the rod, having a thread with a thread angle; and

    c. the anchor, connecting the first structural member to the rod, the anchor including a housing, the housing having a bottom and a top, and the anchor having a longitudinal central axis extending through the bottom and the top of the housing, 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 the inserts 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 inserts are sized with respect to the housing 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 inserts about the rod forcing them to grasp and hold the rod, the lower portion of the insert receiving bore of the housing has a base-bore first sliding surface disposed at an angle to the longitudinal, central axis of the anchor 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; and

    whereind. the first sliding surface of the housing is set at the same angle as the thread angle of the rod.

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