Static structures (e.g. – buildings) – Lapped multiplanar surfacing; e.g. – shingle type – Interfitted sections
Reexamination Certificate
1998-08-28
2001-01-16
Friedman, Carl D. (Department: 3621)
Static structures (e.g., buildings)
Lapped multiplanar surfacing; e.g., shingle type
Interfitted sections
C052S519000, C052S520000, C052S531000, C052S554000, C052S533000
Reexamination Certificate
active
06173546
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to roofing products, and more particularly relates to a new and improved metal shingle which allows convenient and weather-tight interconnectability and color blending.
BACKGROUND OF THE INVENTION
A great variety of different products are available for roofing materials, such as the traditional tar shingle, slate, tile, simulated wood products, and metal sheeting. Some of these products, such as typical tar shingles, have advantages over the other types of roofing material because they are less expensive and perform relatively well. Other types of roofing material, such as simulated wood roofing, slate, and tile, are more expensive, allow a different look to be applied to the roof of a house, yet sometimes suffer from poor performance since there are many seams and interconnection sites that must be weather-tight and are difficult to maintain. There has been an increased interest in metal roofing products which provide durable and weather-tight performance, in addition to having desirable appearance characteristics, in comparison to existing non-metal roofing products.
Metal roofing products have been available for quite some time, and provide a relatively reasonably priced roofing material with desired performance characteristics (resistance to hail damage, adequately weather-tight, and having a long life). Typically, the metal roofing products are available in long sheets either running continuously from the peak to the eaves of a roof, or running horizontally for several feet. These long sheets are sometimes formed to appear as if they are actually individual shingles, when in fact they are one piece of formed metal. One of the reasons elongated sheets have been popular is to reduce the number of seams and improve the weather-tight nature of the metal roofing material, and to make it more convenient to build and transport.
One significant drawback, however, is the fact that these long sheets of metal roofing material are difficult to ship without damage, and are expensive to form, especially if they have intricate artificial individual shingle folds formed therein.
One desirable aspect of tile and slate roofing, irrespective of high cost and maintenance, is that the different colors or hues of the material can be composed on a roof to create a very appealing appearance, which is the result of a process called blending. Blending is the intentional placement of individual or groups of shingles having different colors or hues next to each other to create the desired aesthetic effect—such as a weather-worn roof, a moss-laden roof, or simply a variety of different colors.
While the existing metal roofing has fewer seams to improve the weather-tight performance of the roofing material, the size of the sheets, which dictate the number of seams, are too large to allow effective blending of the roofing material. The large sheets of differing hues or colors placed next to each other do not create an appealing aesthetic appearance, and instead appear blocky or disjointed. The slate, tile and shake roofing materials that allow blending are much smaller in size and thus provide a more gradual transition between different hues and colors placed adjacent to one another. The slate and shake type roofing material that is formed of smaller individual units, however, have more seals to make weather-tight, and thus are less desirable. In some instances, an interleafing felt must be positioned underneath this roofing material to attempt to improve its weather-tight quality.
It is with the above issues in mind that the inventive metal single of the present invention was conceived and developed.
SUMMARY OF THE INVENTION
The present invention in general terms concerns a metal shingle roofing system made of individual metal shingles that are able to be interconnected together conveniently in a weather-tight manner, and have the desired exposed area to allow blending of various colors and hues for desired final appearance.
In more detail, the metal shingle includes a main body having a top, bottom, left and right peripheral edges and a front and a back surface. The top edge defines a top flange bent over the front surface, and bottom edge defines a bottom flange bent over the back surface. The left edge is a straight edge, and the right edge is a lock-formed shape defining a channel and a nailing flange.
The lock-formed edge includes a first section bending away from the front surface, a second section bending outwardly from the first section and extending parallel to the main body, a third section bending back under and adjacent to the second section, a fourth section bent in a U-shape to extend laterally outwardly from the main body and spaced away from the third section, defining a receiving channel.
In addition, a shingle system mounted on a roof sheathing material can incorporate the shingle of the present invention. The system includes a plurality of shingles, including a top adjacent, bottom adjacent, right adjacent and left adjacent shingles. Each of the shingles has a main body having a top, bottom, left and right peripheral edges and a front and a back surface. The top edge defines a top flange bent over the front surface, the bottom edge defines a bottom flange bent over the back surface, the left edge defines a straight edge, and the right edge has a lock-formed shape defining a channel and a nailing flange. The shingles are interconnected together to be weather-tight by the left edge of the right adjacent shingle being inserted into the channel of the right edge of the left adjacent shingle, and the bottom flange of the top adjacent shingle engaging the top flange of the bottom adjacent shingle.
In addition, a shingle mounting unit for attaching a shingle to a roof sheathing material can include a shingle of the present invention. The mounting unit includes a main shingle body having a top, bottom, left and right peripheral edges and a front and a back surface, the top edge defining a top flange bent over the front surface, the bottom edge defining a bottom flange bent over the back surface, the left edge being a straight edge, the right edge having a lock-formed shape defining a channel, and a clip for attaching to the top flange and securing the shingle to the roof sheathing material.
In more detail, the clip has a first base section, a second section sloping away from the first section, a third section extending from the second section and positioned substantially parallel to the first section, a fourth section extending from the third section and bending under the third section to form a U-shaped retainer, and a downwardly bent fifth section extending from the fourth section.
Accordingly, it is the primary object of the present invention to provide a metal shingle that is easily interconnectable with adjacent shingles, and also is of appropriate sizes to allow shingles of differing colors to be placed next to one another for the blending effect.
Other aspects, features and details of the present invention can be more completely understood by reference to the following detailed description of a preferred embodiment, in conjunction with the drawings, and from the appended claims.
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patent:
Dorsey & Whitney LLP
Friedman Carl D.
Yip Winnie
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