Concrete anchor

• US 9,945,115 B2
• Filed: 07/18/2016
• Issued: 04/17/2018
• Est. Priority Date: 10/08/2013
• Status: Active Grant

• Current Assignee: Simpson Strong-Tie Company Incorporated (Simpson Manufacturing Company Incorporated)
• Original Assignee: Simpson Strong-Tie Company Incorporated (Simpson Manufacturing Company Incorporated)
• Inventors: Lin, Jin-Jie
• Primary Examiner(s): Stephan, Beth A
• Application Number:
  US15/213,260
• Publication Number:
  US 20160326738A1
• Time in Patent Office: 638 Days
• CPC Class Codes: B28B 23/005 with anchoring or fastening elements for the shaped articles
• CPC Class Codes: E04B 1/4121 with internal threads or non-adjustable captive nuts
• CPC Class Codes: E04B 1/4135 receiving removal bolt heads E04B1/415 takes precedence
• CPC Class Codes: E04B 1/4157 Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
• CPC Class Codes: E04B 9/18 Means for suspending the supporting construction
• CPC Class Codes: E04G 15/04 Cores for anchor holes or the like around anchors embedded in the concrete means in or on the building element for connecting to handling apparatus E04G21/142
• CPC Class Codes: E04G 21/185 for anchoring elements or elements to be incorporated in the structure
• CPC Class Codes: F16B 37/00 Nuts or like thread-engaging members specially shaped for rotations by a tool F16B23/00
• CPC Class Codes: F16B 37/0857 with the threaded portions of the nut engaging the thread of the bolt by the action of one or more springs or resilient retaining members F16B37/0821 and F16B37/0835 take precedence
• CPC Class Codes: F16B 5/0275 the screw-threaded element having at least two axially separated threaded portions F16B5/0283 takes precedence

Abstract

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.

Claims

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

wherein

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

2. The connection of claim 1, wherein:

the interior rod receiving bore is formed with multiple diameters such that anchors of different diameters can be received by the inserts.

3. The connection of claim 1 wherein:

the first structural member is a hardened concrete member, and the anchor is embedded the hardened concrete member.

4. A method of forming the connection of claim 1 comprising the steps of:

a. embedding the anchor in the first structural member; and

b. inserting the rod into the interior rod receiving bore of the anchor.

6. The connection of claim 1, wherein:

the interior rod receiving bore is formed with multiple diameters such that anchors of different diameters can be received by the inserts.

7. The connection of claim 1 wherein:

the first structural member is a hardened concrete member, and the anchor is embedded the hardened concrete member.

8. A method of forming the connection of claim 1 comprising the steps of:

a. embedding the anchor in the first structural member; and

b. inserting the rod into the interior rod receiving bore of the anchor.

5. 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 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 above the base first sliding surface is a middle housing wall, 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;

d. the inserts are formed with lower portions where the shape of the base bore interfacing surface causes the insert to taper to a bottom edge of the insert; and

e. the middle housing wall has a diameter large enough to contain the lower portions of the inserts when there is a constriction of the inserts about the rod and the inserts grasp and hold the rod;

f. the base-bore first sliding surface is frusto-conical in shape; and

g. the base bore interfacing surface is frusto-spherical where the base bore interfacing surface makes contact with the base-bore first sliding surface.