Dry wall patch

Details Dry wall patch Dry wall patch

2000-03-29

2001-06-19

Friedman, Carl D. (Department: 3635)

Static structures (e.g., buildings)

With means for split-prevention or damaged part repair

C052S514500

Reexamination Certificate

active

06247283

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention:
This invention relates generally to patches for repairing dry walls.
2. Prior Art
When a dry wall or sheet rock wall is damaged with a deep dent or hole, the conventional repair method comprises adhering a rigid sheet over the damaged area, and covering the sheet with spackle. Since all the repair materials are added to the outside surface of the wall, the finished repair forms a noticeable bump on the wall.
Other repair devices and methods are known in the prior art. U.S. Pat. No. 5,960,603 to Redden et al. discloses a dry wall patch comprising a flexible sheet hinged across its center. A hole smaller than the sheet is cut into a wall along a line drawn around a template. The sheet is bent and inserted into the hole. The sheet is pushed in to expand it within the hole, and covered with spackle. However, the sheet tends to pop back out before the plaster dries. Even after the plaster dries, the flexible sheet can be pushed in with moderate force and cause the spackle to crack.
U.S. Pat. No. 5,018,331 to Forzano discloses a patch comprising a disc hinged across its center. The disc is folded, inserted through a hole cut into a wall, and expanded. The disc is held against the back surface of the wall by temporary straps, and the hole is filled with spackle. Because the disc is attached to the back surface of the wall, the entire thickness of the hole must be filled with spackle, which is too thick to dry quickly. Further, the disc can be dislodged with moderate force even after the spackle dries.
U.S. Pat. No. 4,471,594 to Doyle discloses a patch comprising a disc with a long bolt loosely threaded through its center. The disc is positioned on the back surface of a hole cut into an outer wall. The long bolt is turned until it engages an inner wall to press the disc against the outer wall. The disc is prevented from rotating while the large bolt is being turned by holding a smaller bolt. Because the disc is attached to the back surface of the outer wall, the entire thickness of the hole must be filled with spackle, which is too thick to dry quickly. The large bolt is threaded through a nut simply glued to the disc. Since no torque is applied between the bolt and the disc while the bolt is advanced through the disc, the nut does not have to be strongly fixed to the disc.
U.S. Pat. No. 4,152,877 to Green discloses a patch comprising a sheet clipped to the back surface of a wall. Again, a thick layer of spackle is required to fill the hole, and the sheet can be dislodged with moderate force.
U.S. Pat. No. 4,406,107 to Schoonbeck discloses a patch comprising a larger disc glued to the back surface of a wall. A smaller disc is supported in front of the larger disc by a bolt extending there between. The spacing between the discs is adjusted by turning loose nuts on the bolt. The smaller disc is positioned closer to the outer surface of the wall to reduce the spackle required. Since no torque is applied between the bolt and the larger disc while the smaller disc is advanced along the bolt, the nut does not have to be strongly fixed to the larger disc. U.S. Pat. No. 276,499 to Story discloses a threaded wood plug for filling a threaded hole in a board. The hole must be threaded to receive the plug.
OBJECTIVES OF THE INVENTION
Accordingly, the objectives of the present dry wall patch are:
to permanently repair a damaged area on a dry wall;
to provide a completely flush surface when finished;
to form a strong repair;
to require a minimum of spackle for quick drying;
to be simple to install; and
to be very simple to manufacture.
Further objectives of the present invention will become apparent from a consideration of the drawings and ensuing description.
BRIEF SUMMARY OF THE INVENTION
The present dry wall patch comprises a disc with a threaded rim. A lock nut is strongly attached to one side of the disc, and a bolt is inserted through the disc from the opposite side and threaded tightly into the nut. A wrench is applied to the bolt to turn the disc into a hole on a wall until the disc is recessed slightly within the hole. The nut includes teeth that dig into the disc to hold it in position while the bolt is being wrenched. The bolt is removed after the disc is in position. The hole is filled with spackle and sanded until completely flush with the wall. Other embodiments include a polygonal block screwed to the disc for mating with a turning tool, radial slots cut into the face of the disc for mating with a turning tool, apertures drilled into the disc for mating with a turning tool, and a handle positioned through a block screwed to the disc.


REFERENCES:
patent: 276499 (1883-04-01), Story
patent: 4152877 (1979-05-01), Green
patent: 4406107 (1983-09-01), Schoonbeck
patent: 4471594 (1984-09-01), Doyle
patent: 4820564 (1989-04-01), Cologna et al.
patent: 5018331 (1991-05-01), Forzano
patent: 5960603 (1999-10-01), Redden et al.

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