 Endoscope connecting apparatus |
| An object of the present invention is to provide an endoscope connecting apparatus whereby an ... |
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| Method and apparatus for construction of grain bins |
| Proceeding therefore to describe the invention in detail, reference should first be made to FIG. 1 ... |
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| Closure for a fisherman's live well |
| OF PREFERRED EMBODIMENTS There is shown in FIG. 1 a closure 10 for covering the entrance of a ... |
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| Tie down anchor |
| OF THE PREFERRED EMBODIMENT Turning now to the drawings, particularly FIG. 1, there is illustrated ... |
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| Cargo control track and fitting |
| I claim: 1. A cargo track and fitting system comprising, in combination, an elongated track ... |
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| Device for accomodating a loudspeaker into a cut-out of a sound panel |
| What is claimed is: 1. A device for accomodating a loudspeaker into a cut-out of a sound panel, in ... |
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| Structure and method for restraining motion of a marine structure |
| What is claimed is: 1. A structure for restraining motion during environmental loading, comprising A... |
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| Air-vapor barrier continuity device |
| OF A PREFERRED EMBODIMENT FIGS. 1, 2 and 3 of the drawings illustrate a preferred embodiment of ... |
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| Dynamic workspace module |
| One aspect of the present invention is a compact and dynamic workspace module capable of creating ... |
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| Timber connecting system and timber connecting element |
| I claim: 1. A timber connecting system for wood structures, said system comprising, in combination ... |
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Method and apparatus for waterproofing concrete
| Details |
Inventors: Gordon, James R.;
Assignee:
Primary Examiner: Murtagh; John E.
Assistant Examiner:
Attorney, Agent or Firm: Hewson; Donald E.
A rod hole plugging system for providing an effective permanent plug within a tie rod hole extending through the thickness of a poured cement wall utilizes a short, low cost plug selected from natural fibre or synthetic foam, which is soaked by a liquid resin coating which is seasonally selectible to meet environmental conditions. The selected plug has a diameter exceeding that of the rod hole to be plugged. The selected group of resins is water-tolerating and impermeable, and may be a high solids polyisocyanate prepolymer that will harden to a polyurethane polymer; or it may be a selected mixture of epoxy resin and hardener. The plug is soaked in the resin, and is then diametrically compressed and inserted within the interior (i.e., inside the foundation of the structure) end of the rod hole being treated. The elastic memory of the plug material causes it to swell and engage the walls of the rod hole, in which condition the liquid resin sets up. A low cost, substantially waterproof, permanent plug for the rod hole is thereby established. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring first to the drawings, portions of a wall 10 having a rod hole 12 extending therethrough are shown.
The rod hole 12 is provided with an outer plug 14 adjacent the wall outer surface 16, and an inner plug 18 located in recessed relation from the wall inner surface 20.
A surface patch 22 of epoxy topping compound is illustrated, although it does not form a part of the present invention.
As mentioned, the outer plug may be--and usually is--the standard cork plug that is used in such structures for closing the outer end of the rod hole.
The subject plug 18 is of suitable material as specified above, having a length of about one inch, and a diameter slightly greater than the diameter of the rod hole 12, so as to compress the resin soaked plug 18 when it is inserted under manual pressure (or otherwise, as discussed hereafter) into the rod hole 12.
The elastic memory of the plug material tends to restore its diameter, holding the resin soaked peripheral surface 19 of the plug 18 in intimate bonding contact against the wall portion 13, which the plug 18 overlies.
There may also be an interstitial bonding, by which the hardened resin physically intrudes into interstices or other irregularities in the bore of the rod hole, and thereby creates a mechanical linking as well as an adhesive bonding.
It has been found that a permanent bond is formed by the subject system between plug 18 and surface 13 of hole 12.
It should also be noted that the system, and method, of the present invention may be automated; it being only necessary that the plug be at least somewhat diametrically compressed prior to being placed in the rod hole, and that the placement be carried out before the resin sets up and hardens.
The usually employed two part epoxy adhesive comprises a number of variants, which may conveniently be selected from compatible resins, diluents and hardeners listed below, together with their commercial sources.
It will be understood that the season of year in which the plugs are to be installed will affect the choice of a rapid cure hardener agent, or a slower curing hardener agent
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Screen Walls 
