This invention relates to an economical and efficient manner for replacement of existing athletic floors that have exhausted wear life or experienced issues requiring replacement. More particularly, the invention relates to a worn athletic flooring system having “clip in channel” or “channel and clip” components, the channels being left in place and then resiliently retrofit with a new athletic floor, and preferably using a new method, to have new wear life as taught herein.
Numerous forms of what are referred to as clip in channel (or channel and clip, and these terms are used interchangeably herein and denote an elongated raised channel secured to a ground substrate like concrete and flooring secured thereto by a clip that adjoins between the channel and the flooring) floor systems date back nearly 90 years ago beginning in the 1930's. An original design is described in U.S. Pat. No. 2,116,737 by LF Urban, with channels and clips. Such floors were known to serve very well in heavy use applications such as factories and warehouses became prominent in massive post office facilities in major US cities. Clip in channel type floors were also frequently chosen for athletic facilities such as school gymnasiums and sports arenas well into the 1980's, with especially limited inclusion in new construction today. Clip in channel floors have included three flooring thickness options of 25/32 inch, or 27/32 inch, or 33/32 inch. The 33/32 inch thickness is by far the most common flooring thickness profile selected for clip in channel installations, resulting in overall floor surface nominal profile of 1 and ½ inches when placed on the elongated raised channel sections.
Installation of clip in channel type floors greatly diminished in the past 30 years as preference for resilient shock absorbing athletic floors have increased to become normally specified for gymnasiums and recreational facilities. Numerous replacements of clip in channel floors occur frequently each year as wood flooring surfaces have exhausted wear life due to multiple sanding's, or replaced as related to catastrophic moisture infiltration, or specifically to provide a resilient shock absorbing athletic floor instead of the hard non-resilience associated with clip in channel floors.
Replacing such floors requires removal of the wood flooring surface and 96-inch-long metal (often steel) channel sections arranged end to end, commonly spaced 12 inches on center. Each channel section often includes eight anchorage pins driven nominally 1 and ¾ inches into the concrete substrate requiring considerable manual or machine applied force to dislodge. Removal of channel anchorage pins routinely results in fragmented craters in the surface of the ground substrate (most often concrete or the like) commonly referred to as spalling. Aside from the damage and cost to remove the channels and cost of cementitious patching material and labor to perform remedial work to address spalled concrete, an average size high school gymnasium floor requires disposal of 8,000 linear feet of detached metal channels.
In addition to challenges associated with removal and preparation work for installation of a new athletic floor system, resilient floors which are now desired frequently have profile heights differing from the original floor height. Solutions commonly require additional components to elevate floor system options or undesired ramps at doorways and/or adjacent surfaces to address uneven transitions.
To address one or more of the deficiencies discussed above, there is a need for a new athletic floor that improves current technology or techniques for replacing worn athletic floors having existing channels still in place on the ground substrate. For example, this can help meet performance values associated with athletic floor standards while maintaining a profile height that eliminates special transition ramping at doorways without requiring removal of certain of the existing infrastructure. And, considering that clip in channel floors were often selected for facilities frequently used for heavy load impacts such as exhibits and non-athletic gatherings, the new athletic floor here can accept such load pressure while protecting the integrity of the floor system components.
As demonstrated in the following description, my new athletic floor provides a manner to economically and efficiently replace common athletic floor systems that have exhausted wear life or are desired to be replaced by a resilient athletic floor as much as possible without completely having to remove the entire existing worn athletic floor structure. This can take advantage of allowing existing channels secured in the ground substrate to remain in place. Thereby, eliminating associated labor costs required for removal of channels or the like and grout or asphalt filler, as well as fastening components or anchors embedded into the ground substrate, like concrete. Furthermore, the invention can eliminate the necessity of addressing hazardous materials such as asbestos included in hot poured asphalt commonly used in construction prior to understanding associated health risks. This can also help in eliminating significant labor costs, as well as added delays in construction schedules and disposal of hazardous material. For example, eliminating labor and patching material required to address fractures following removal of embedded concrete anchors, and/or leveling the original concrete base that is commonly found to be especially uneven and undulated.
I also provide a new athletic floor method to introduce resiliency and provide a newly completed floor which is equal or within an acceptable profile height tolerance equivalent to the original floor and new floor standards. That is, providing an equivalent profile height can also maintain desired flush transition to bordering surfaces without requiring special ramping at doorways or other adjacent floor surfaces, if desired. Still further, this can also help to protect resilient components and related assemblies from excessive compression when the floor surface is pressured under non-athletic loads.
In view of the foregoing, described herein is a new athletic floor resiliently retrofit to a worn athletic floor including a plurality of elongated raised channels spaced from one another and connected to a ground substrate. The new athletic floor includes at least two elongated subfloor panels. Each elongated subfloor panel is connected to the ground substrate, including opposite shiplap ends, and adjoined to at least one other elongated subfloor panel at the opposite shiplap ends to form a first set of adjoined elongated subfloor panels. The new athletic floor also includes at least two elongated raised channels spaced from one another and having the first set of adjoined elongated subfloor panels located between the two elongated raised channels spaced from one another. The floor further includes at least one elongated raised channel spaced from the at least two elongated raised channels and a second set of adjoined elongated subfloor panels located between two elongated raised channels spaced from one another. Still further, the floor includes a resilient pad positioned between a bottom surface of each elongated subfloor panel and the ground substrate. And, yet further, the floor includes a new flooring located on the first set and the second set of elongated subfloor panels and covering at least one elongated raised channel. Finally, importantly, a bottom surface of the new flooring is spaced from a top surface of the elongated raised channel by a distance of between about 2.3 millimeters and about 5 millimeters when the new flooring is in an unloaded condition.
In another embodiment there is a method to retrofit the worn athletic floor to have new wear life, the worn athletic floor including the plurality of elongated raised channels spaced from one another and connected to the ground substrate. The method has various steps, including adjoining at least two elongated subfloor panels to each other at opposite shiplap ends to form the first set of adjoined elongated subfloor panels. Another step is connecting the first set of adjoined elongated subfloor panels to the ground substrate between two elongated raised channels spaced from one another. And, also the step connecting the second set of adjoined elongated subfloor panels to the ground substrate and between a third elongated raised channel spaced from the two elongated raised channels. Further, is a step positioning the resilient pad between the bottom surface of each elongated subfloor panel and the ground substrate. And, a couple final steps there is locating the new flooring on the first set and the second set plurality of elongated subfloor panels and covering at least one elongated raised channel; and, spacing the bottom surface of the new flooring from the top surface of the elongated raised channel by the distance of between about 2.3 millimeters and about 5 millimeters when the new flooring is in an unloaded condition.
Other embodiments are directed to the relationship between various components and their level of connectedness and/or configuration relative to one another, as well as preferred features for the components and the steps of the method.
As used herein, “adjacent” means next to or adjoining the stated structure or object and there may be intervening material between the referenced structures or objects as long as it does not significantly negate the stated relationship of the referenced structures or objects.
As used herein, “adjoin” (and formatives thereof, including adjoined and adjoining) means next to or joined with.
As used herein, “connect” (and formatives thereof, including connected and connecting) means the components or parts are attached to each other and would require a force to separate them.
The invention may be more completely understood in consideration of the following detailed description of various embodiments of the invention in connection with the accompanying drawings, in which:
The drawings show some but not all embodiments. The elements depicted in the drawings are illustrative and not necessarily to scale, and the same (or similar) reference numbers denote the same (or similar) features throughout the drawings.
My new athletic floor offers an economical resilient athletic performance solution for replacement of previous, worn athletic floors in which existing elongated raised channels are connected to the ground substrate and remain in place. This can be better understood in reference, first, to the prior art existing floor system and its components, as now described.
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In accordance with practice of my new athletic floor, as seen in
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Recessed slots 47 preferably measure ⅝ inch wide and ⅛ inch deep as measured from the bottom most portion of surface 36 of the subfloor panels. Preferably there are two slots per panel with each slot located 1 and ¾ inches on center from outer edges of the panel. More preferably, such recessed slots run the length of the subfloor panels and such can be continuous or discontinuous along that length. For example, this can include placement of ½ inch wide by ¼ inch thick by 96 inch long sections of resilient material in each slot. The dimensions of the recessed slots and resilient component(s) can be altered while remaining within the scope of the disclosure here. Recessed slots can be increased or decreased in width and depth to accommodate optional dimensions of resilient pad(s), such as 44, 46. Resilient pads can also be provided in short lengths and intermittently spaced within the continuous recessed slots, or intermittent recesses can be provided where intermittent resilient pads are placed rather than full length sections. Resilient pads are preferably manufactured from elastic or resilient material such as open cell polyurethane foam or sponge rubber, or with other elastomers that provide desired response to impacts associated with athletic activity.
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My invention is also directed to a method to resiliently retrofit the worn athletic floor 2 to have new wear life. One step is adjoining at least two elongated subfloor panels 32, 34 to each other at opposite shiplap ends to form the first set of adjoined elongated subfloor panels 40. Another step is locating the first set 40 of adjoined elongated subfloor panels on the ground substrate 20 between two elongated raised channels 12 spaced from one another. Still another step is locating the second set 42 of adjoined elongated subfloor panels on the ground substrate 20 and between a third elongated raised channel 12 spaced from the two elongated raised channels. There is a step positioning the resilient pad 44 and/or 46 between the bottom surface 36 of each elongated subfloor panel and the ground substrate. And, there is also a step locating the new flooring 48 on the first set 40 of adjoined elongated subfloor panels and the second set 42 of adjoined elongated subfloor panels and covering at least one elongated raised channel. Finally, there is a step spacing the bottom surface 49 of the new flooring from the top surface 14 of the elongated raised channel 12 by the distance 16 of between about 2.3 millimeters and about 5 millimeters when the new flooring 48 is in the unloaded condition.
In other aspects the method, preferably, is directed to the configuration of certain components. For example, the method can include removing the worn athletic floor 2, except for the channels 12, before doing the step connecting the first set 40 of adjoined elongated subfloor panels to the ground substrate 20 between two elongated raised channels 12 spaced from one another. Additionally, or alternatively, the method can include the spacing 16 is by distance of between about 2.5 millimeters and about 4 millimeters, and more preferably by distance of between about 2.7 millimeters and about 3.5 millimeters. Yet additionally, or alternatively, the method can include locating the first and/or second set of adjoined elongated subfloor panels on the ground substrate is securing the ground substrate anchor 22 and/or 23 to the respective first or second set of adjoined elongated subfloor panels and into the ground substrate.
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Each and every document cited in this present application, including any cross referenced or related patent or application, is incorporated in this present application in its entirety by this reference, unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to any embodiment disclosed in this present application or that it alone, or in any combination with any other reference or references, teaches, suggests, or discloses any such embodiment. Further, to the extent that any meaning or definition of a term in this present application conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this present application governs.
The present invention includes the description, examples, embodiments, and drawings disclosed; but it is not limited to such description, examples, embodiments, or drawings. As briefly described above, the reader should assume that features of one disclosed embodiment can also be applied to all other disclosed embodiments, unless expressly indicated to the contrary. Unless expressly indicated to the contrary, the numerical parameters set forth in the present application are approximations that can vary depending on the desired properties sought to be obtained by a person of ordinary skill in the art without undue experimentation using the teachings disclosed in the present application. Modifications and other embodiments will be apparent to a person of ordinary skill in the art of athletic floors, and all such modifications and other embodiments are intended and deemed to be within the scope of the present invention.
This application claims the benefit of U.S. Provisional Application No. 62/964,722, filed Jan. 23, 2020, and titled: LOW PROFILE ATHLETIC FLOOR FOR REPLACEMENT OF CHANNEL AND CLIP FLOOR SYSTEMS.
Number | Date | Country | |
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62964722 | Jan 2020 | US |