Patent Application
20130122794
The invention relates to a chimney tee cap retainer assembly, and more particularly, a chimney tee cap retainer comprising an adjustable assembly having at least two sprung members for releasably attaching the cap to a chimney tee.
In dwelling construction, particularly with single family homes, townhouses and condominiums, there has been increasing use of factory-built, prefabricated metal chimneys for use with interior fireplaces, wood stoves, and even with normal oil or gas fired furnaces. These chimneys vent the spent gas from the fireplace, stove or furnace to the atmosphere normally at a legislated height above the roof of the residence.
Depending on the location of the fireplace, stove or furnace, these chimneys may extend horizontally through a sidewall of the dwelling before extending vertically along the outside wall of the dwelling to the predetermined height or they may extend through an interior wall of the dwelling into a utility room or attached garage before extending vertically through the roof of the dwelling. A substantial portion of the vertical portion of the chimney may be within the dwelling itself.
In either instance, it is normal procedure to support the vertical portion of the chimney with a support plate which is proximate to the position where the chimney changes direction from the horizontal to the vertical, See
Since the combustion process generates corrosive gases, these end caps, and in particular, the screws which secure them, deteriorate to the point where the screws rust permitting the end cap to fall off or the end cap itself deteriorates such that the end cap is capable of falling off.
If the end cap falls out the homeowner is faced with the consequences of having possible noxious and toxic fumes exit the chimney within the dwelling place. It may also subject the dwelling to a fire hazard if the cleanout tee is located proximate to the fireplace, stove or furnace such that hot gases would exit the cleanout tee, in turn igniting flammable material proximate to the chimney. This may include the exterior sidewall of the dwelling unit.
Representative of the art is U.S. Pat. No. 4,838,243 which discloses a chimney lock attachable to the support plate of a prefabricated metal chimney having vertically downwardly depending cleanouts, the cleanouts being enclosed by an end cap, the lock comprising an adjustable, planer, longitudinal bar removably or rotatably secured to the support plate and positioned to frictionally engage and secure the end cap of the chimney cleanout.
What is needed is a chimney tee cap retainer comprising an adjustable assembly having at least two sprung members for releasably attaching the cap to a chimney tee. The present invention meets this need.
The primary aspect of the invention is to provide a chimney tee cap retainer comprising an adjustable assembly having at least two sprung members for releasably attaching the cap to a chimney tee.
Other aspects of the invention will be pointed out or made obvious by the following description of the invention and the accompanying drawings.
The invention comprises a chimney tee cap retainer assembly comprising a cap, a first member comprising a guideway extending in a longitudinal direction, the first member connectable to the cap using a first fastener, a second member having a sprung end portion, the sprung end portion for releasably engaging a chimney surface, the second member adjustably engaged with the guideway using a second fastener, a third member having a sprung end portion, the sprung end portion for releasably engaging a chimney surface, the third member adjustably engaged with the guideway using a third fastener, and the second member and the third member each having a second member portion and a third member portion each extending normal to the first member and each extending in the same axial direction.
The accompanying drawings, which are incorporated in and form a part of the specification, illustrate preferred embodiments of the present invention, and together with a description, serve to explain the principles of the invention.
The inventive device generally comprises formed stainless steel components and fasteners that enable the user to assemble the tee cap retainer to a desired dimension then install it on a chimney tee by simply pressing the assembly on the tee until it snaps in place. Later removal for inspection and cleaning of the chimney is accomplished by simply inserting the blade of a small screw driver, or similar pry tool, under one of the sprung members on either side of the assembly, then prying up the member and pulling on the eye-bolt until the assembly disengages from the chimney tee.
Since the bracket 30 is located remotely from the chimney tee 10, it is not possible to use the bracket 30 to secure the tee cap 20 to the tee. Hence, without the inventive device it would otherwise be necessary to drill a series of holes through the outer wall of the chimney tee to secure the tee cap 20. Of course, holes in the chimney are undesirable since they would allow moisture to migrate inward, it would be time consuming to remove and realign the holes during installation, and in certain cases may allow flue gases to exit through the holes.
Each end portion 26 (or 26A) and end portion 27 (or 27A) of each right angle bracket comprises a predetermined shape which allows the tee cap to be attached to the chimney tee section by gripping either the inside surface 12 or outside surface 11 of the tee. Both sets of brackets can be provided with the cap assembly but only one is used depending upon the construction and configuration of the chimney joint design.
The assembly further comprises a C-shaped channel member 23 with threaded studs 28 and a hole 29A. The channel member is attached to the cap 20 with an Eye-bolt 29 and nuts 29B. Fasteners such as stud bolts 28, having wing (or regular hex) nuts 28A secure the brackets 21 and 22 to the channel. The C-shaped channel member 23 acts as a longitudinal guideway to keep the brackets in alignment and provides a stiff span length across the bottom of the cap to keep the cap securely in place without bending or distortion.
Although a form of the invention has been described herein, it will be obvious to those skilled in the art that variations may be made in the construction and relation of parts without departing from the spirit and scope of the invention described herein.
