Pipe joints or couplings – End to side or plate – Penetrating
Reexamination Certificate
1999-10-05
2001-10-16
Luu, Teri Pham (Department: 3629)
Pipe joints or couplings
End to side or plate
Penetrating
C285S343000, C052S220200
Reexamination Certificate
active
06302449
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to transition conduits for protecting piping traversing through a wall and, more particularly, to an adjustable length transition conduit for protecting steel gas piping as it traverses through a wall.
2. Description of the Related Art
Various plumbing construction procedures require a variety of specialty tools and parts to provide for a professional appearing installation that meets all applicable building codes. One area that is frequently the center of attention in a plumbing inspection is the matter of steel gas piping that passes through masonry walls such as concrete block or concrete. This area is extremely important due to the possible damage that may occur to the pipe. Such damage includes collapsing of the pipe, physical damage to the pipe, and corrosion of the pipe. One method that aids in the prevention of these occurrences is a pipe sleeve. These sleeves are commonly sealed to the pipe using rubber sealing rings and steel nuts. However, the steel nuts continue to allow the pipe to corrode and rust. Accordingly, there is a need for a means by which steel gas pipes can be sealed as they pass through masonry walls in a manner which does not allow for corrosion. The development of The Sealing Ring/Sealing Nut fulfills this need.
In the related art, there exists some patents for wall penetrating conduits and sleeves. None of these patents provide an adjustable length PVC conduit which can be measured and cut on the job site for varying wall thicknesses.
A search of the prior art did not disclose any patents that read directly on the claims of the instant invention; however, the following references were considered related:
U.S. Pat. No.
Inventor
Issue Date
5,207,459
Glover
May 4, 1993
3,989,283
Pepper
Nov. 2, 1976
5,588,682
Breese
Dec. 31, 1996
5,433,487
Kuhn et al.
Jul. 18, 1995
5,244,237
Harvey
Sep. 14, 1993
5,118,141
Miyashita
Jun. 2, 1992
4,878,697
Henry
Nov. 7, 1989
4,699,177
Thomas
Oct. 13, 1987
4,427,219
Madej
Jan. 24, 1984
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide an improved transition conduit for surrounding a steel pipe as it passes through a wall.
It is another object of the present invention to seal out water, bugs, rodents, and other undesirables from the area in the wall surrounding a steel pipe passing therethrough.
It is yet another object of the present invention to provide for professional installation.
It is yet still another object of the present invention to compress the nylon seal onto gas pipe.
It is another object of the present invention that it will not corrode steel pipe used as gas line.
It is an advantage of the present invention to use plastic sealing nuts instead of steel.
It is another advantage of the present invention to use a nylon seal instead of a rubber seal.
Briefly described according to one embodiment of the present invention, The Sealing Transition Conduit, as its name implies, is an improvement to an existing system of providing a sleeve system for natural gas piping passing through concrete walls. Conventional methods of sealing the sleeve piping utilize a steel nut and a rubber sealing ring. The present invention utilizes a plastic nut and a nylon sealing ring, and an adjustable length PVC conduit. This provides for not only a more secure seal against the entrance of water and/or other corroding substances, it also provides for a decrease in the corrosion of the gas line itself. The sleeve conduit is routed through the masonry wall and extends out from the wall on both sides. The gas line is routed through the conduit in a continuous manner. The nylon sealing ring and the plastic nut then center the gas line within the conduit and seals it against the entrance of any foreign matter. The use of The Sealing Ring/Sealing Nut will result in quick and professional looking installation, while providing for increased longevity of the steel gas line.
REFERENCES:
patent: 1391396 (1921-09-01), McMurtrie
patent: 2450883 (1948-10-01), D'Amico
patent: 2733939 (1956-02-01), Scherer
patent: 3989283 (1976-11-01), Pepper
patent: 4427219 (1984-01-01), Madej
patent: 4699177 (1987-10-01), Thomas
patent: 4878697 (1989-11-01), Henry
patent: 5118141 (1992-06-01), Miyashita
patent: 5207459 (1993-05-01), Glover
patent: 5244237 (1993-09-01), Harvey
patent: 5433487 (1995-07-01), Kuhn et al.
patent: 5588682 (1996-12-01), Breese
patent: 6006773 (1999-12-01), Bravo
patent: 3539487 (1987-05-01), None
patent: 3712309 (1988-05-01), None
Clayton Matthew
Corrigan Michael J.
Gugliotta John D.
Luu Teri Pham
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