Ventilation – Chimney or stack – Having lining or sleeve
Reexamination Certificate
2000-03-28
2001-10-02
Joyce, Narold (Department: 3749)
Ventilation
Chimney or stack
Having lining or sleeve
C285S042000
Reexamination Certificate
active
06296560
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a chimney cap assembly. More particularly, the invention relates to a chimney cap assembly employing a one-piece chimney cap and a collar member to prevent the passage of undesirable objects between the chimney chase and the chimney pipe.
2. Description of the Prior Art
With the recent proliferation of houses, townhouses and condominiums including non-masonry chimneys the shortcomings of prior chimney cap assemblies have become highly apparent. Specifically, and with reference to
FIG. 1
, non-masonry chimneys
1
are currently assembled with a chimney pipe
2
extending within a chimney chase
3
. The gap
4
formed between the chimney pipe
2
and the chimney chase
3
must be covered to prevent the passage of undesirable objects between the chimney pipe
2
and the chimney chase
3
.
This gap
4
is commonly covered by the application of a collar
5
to the outer wall
6
of the chimney pipe
2
. The collar
5
also sits over a multiple piece chimney cap
7
. The edge
8
of the collar
5
is securely sealed to the chimney pipe
2
through the application of caulk
9
at the joint where the collar
5
meets the chimney pipe
2
. The multiple piece chimney cap
7
is generally formed with a flat plate
7
a
having an upwardly extending flange
7
b
secured thereto through the use of caulk
9
a.
Over time, however, the caulk
9
a
bonding the upwardly extending flange
7
b
to the flat plate
7
a
is subjected to sitting water and other corrosive agents which cause the caulk joint therebetween to rot and require maintenance. This is highly undesirable for homeowners and may result in substantial damage where the seal is not properly and timely repaired. When the caulk rots in this manner, moisture, animals and other debris may enter the space between the chimney pipe and the chimney chase, causing substantial damage to the structure of the building. In addition, the chimney cap
7
is commonly made from unpainted galvanized steel, which is highly susceptible to rusting and corrosion.
As such, a need exists for an improved chimney cap assembly. The present invention provides such a chimney cap assembly.
SUMMARY OF THE INVENTION
It is, therefore, an object of the present invention to provide a chimney cap assembly for use in the installation of non-masonry chimneys including a chimney chase and a centrally extending chimney pipe. The chimney cap assembly includes a chimney cap for positioning upon the chimney chase. The chimney cap includes a central opening shaped and dimensioned for positioning about the chimney pipe, wherein the central opening includes an upwardly extending flange. The chimney cap assembly further includes a collar member having an inner edge positioned at the top of the collar member and an outer edge positioned at the bottom of the collar member. The collar member is positioned above the chimney cap such that the bottom of the collar member substantially overlaps the upwardly extending flange along a longitudinal axis extending along the chimney pipe. In addition, the inner edge of the collar member is secured to the chimney pipe creating a seal therebetween. The overlap between the upwardly extending flange and the collar member substantially prevents the passage of undesirable objects between the chimney chase and the chimney pipe without necessitating the formation of a seal between the collar and the chimney cap.
It is also an object of the present invention to provide a chimney cap assembly wherein the chimney cap is formed from aluminum.
It is another object of the present invention to provide a chimney cap assembly wherein the collar member is formed from galvanized steel.
It is a further object of the present invention to provide a chimney cap assembly wherein the upwardly extending flange is formed with a radiused curve.
It is also another object of the present invention to provide a chimney cap assembly wherein the central opening has a diameter approximately 0.25 inches larger than that of the chimney pipe.
It is yet another object of the present invention to provide a chimney cap assembly wherein caulk secures the collar member to the chimney pipe.
It is still a further object of the present invention to provide a chimney cap assembly wherein the chimney cap includes a downwardly extending edge detail shaped and dimensioned to fit about an edge of the chimney chase.
It is also an object of the present invention to provide a chimney cap assembly including a spark arrester positioned above an open end of the chimney pipe.
It is another object of the present invention to provide a chimney cap assembly including a one-piece chimney cap for positioning upon the chimney chase. The chimney cap includes a central opening shaped and dimensioned for positioning about the chimney pipe, wherein the central opening includes an upwardly extending flange. The chimney cap assembly further includes a pipe cover shaped and dimensioned for covering an open end of the chimney pipe. The pipe cover includes a collar member having an inner edge positioned at the top of the collar member and an outer edge positioned at the bottom of the collar member. The collar member is positioned above the chimney cap such that the bottom of the collar member substantially overlaps the upwardly extending flange along a longitudinal axis extending along the chimney pipe. The overlap between the upwardly extending flange and the collar member substantially prevents the passage of undesirable objects between the chimney chase and the chimney pipe without necessitating the formation of a seal between the collar and the chimney cap.
Other objects and advantages of the present invention will become apparent from the following detailed description when viewed in conjunction with the accompanying drawings, which set forth certain embodiments of the invention.
REFERENCES:
patent: 197033 (1877-11-01), Hull
patent: 509947 (1893-12-01), Reynolds
patent: 760092 (1904-05-01), Warlick
patent: 937254 (1909-10-01), Maier
patent: 1103666 (1914-07-01), Fife
patent: 5009220 (1991-04-01), Cornelison
patent: 5025712 (1991-06-01), Perry
patent: 5536048 (1996-07-01), Orr
patent: 5842918 (1998-12-01), Cowen
Boles Derek S.
Joyce Narold
Welsh & Flaxman LLC
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