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Tie rod hole plug in combination with a wall hole
| Details |
Inventors: Mess, Richard C.; Tausanovitch, Dusan;
Assignee: The Dayton Sure-Grip & Shore Co. (Miamisburg, OH)
Primary Examiner: Braun; Leslie
Assistant Examiner:
Attorney, Agent or Firm: Biebel, French & Nauman
A resilient plug for closing and sealing the opening formed in a concrete wall by the removal of the tie rod used to support the walls forms. The elastic plug is formed with a tapered socket and has a smooth outer surface, including a tapered leading end and a main body section having a larger diameter than the hole in the concrete and extending from the leading end. The plug is engaged in a tie rod hole by inserting a rod into the socket and pushing the plug into the tie rod hole. This causes an elongation of the plug, reducing its diameter and facilitating its insertion into the tie rod hole. However, when the force applied to the plug during insertion is removed the plug expands radially, forming a tight seal with the wall of the tie rod hole. |
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DETAILED DESCRIPTION In accordance with the present invention, a plug is provided for the hole formed through a concrete wall by the removal of a reusable tie rod which is inexpensive in construction, extremely easy to install and yet provides a superior seal.
The plug is formed of resilient material and consists of a main body section and a tapered leading section, both having smooth outer surfaces.
The plug is hollow, at least in the region of the main body section, forming a socket for receiving an installing tool, such as a section of tie rod.
With a rod received within the hollow plug, the main body section of the plug, which has an outside diameter greater than the diameter of the tie rod hole to be plugged, is pushed into the tie rod hole by the rod received in the plug.
As the leading end of the plug moves into the tie rod hole, the plug will tend to elongate, reducing its diameter and allowing the plug to slip easily into the tie rod hole.
However, upon removal of the insertion force applied to the plug, it will tend to contract to its normal length, expanding radially into sealing engagement with the wall of the tie rod hole.
While the plug is extremely easy to insert into the hole it cannot be dislodged under most conditions encountered in the field.
In fact, any force tending to push the plug back out of the tie rod hole will tend to increase the sealing force exterted by the outer surface of the plug on the wall of the tie rod hole.
If desired, instead of using simply a length of rod for installing the plug, a tool may be provided in accordance with the greatest invention which will permit installation of a plug automatically to the desired depth within the hole.
If desired, the plug may be formed of a material such as neoprene and colored approximately the same color as the concrete wall within which it is received.
The plug can then be inserted to a point where its trailing end is flush with the wall face, or it can be inserted in somewhat beyond that point and a small filling of grout utilized to present a smooth unbroken wall face
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Screen Walls 
