Perforated tactile warning device

Abstract

Described herein is a perforated tactile warning device comprising a tactile panel and a porous concrete slab. The tactile panel includes perforations to allow water to pass through the tactile panel and the tactile panel is secured to the porous concrete slab such that a space exists between the tactile panel and the porous concrete slab. Further, the porous concrete slab may include channels to collect water and direct water within the porous concrete slab. Further still, where the concrete slab includes channels, the concrete slab may be nonporous and may utilize drainage holes to permit water to pass through an otherwise nonporous concrete substrate.

Claims

1. A perforated tactile warning device comprising: a porous concrete slab having a plurality of channels; and a tactile panel comprising a plurality of domes, a plurality of anchor holes and a plurality of perforations, wherein the tactile panel is secured to the porous concrete slab via a plurality of anchors, each anchor passing through the tactile panel via one of the anchor holes.

2. The perforated tactile warning device of claim 1 wherein the plurality of perforations are positioned substantially above the plurality of channels.

3. The perforated tactile warning device of claim 1 wherein the plurality of channels are arranged substantially parallel.

4. The perforated tactile warning device of claim 1 wherein the plurality of channels are arranged in a grid pattern.

5. The perforated tactile warning device of claim 1 wherein the porous concrete slab includes one or more lifting points.

6. The perforated tactile warning device of claim 1 wherein the porous concrete slab extends beyond the tactile panel to create a border of porous concrete.

7. The perforated tactile warning device of claim 1 wherein a substantial portion of the tactile panel is in direct contact with the porous concrete slab.

8. A perforated tactile warning device comprising: a nonporous concrete slab having a plurality of channels and one or more drainage holes; and a tactile panel comprising a plurality of domes, a plurality of anchor holes and a plurality of perforations, wherein the tactile panel is secured to the nonporous concrete slab via a plurality of anchors, each anchor passing through the tactile panel via one of the anchor holes.

9. The perforated tactile warning device of claim 8 wherein the one or more drainage holes are positioned within the plurality of channels.

10. The perforated tactile warning device of claim 8 wherein the plurality of perforations are positioned substantially above the plurality of channels.

11. The perforated tactile warning device of claim 8 wherein the plurality of channels are arranged substantially parallel.

12. The perforated tactile warning device of claim 11 wherein at least one of the one or more drainage holes are located within the plurality of channels.

13. The perforated tactile warning device of claim 8 wherein the plurality of channels are arranged in a grid pattern.

14. The perforated tactile warning device of claim 13 wherein at least one of the one or more drainage holes is located at the intersection of two channels.

15. The perforated tactile warning device of claim 8 wherein the nonporous concrete slab includes one or more lifting points.

16. The perforated tactile warning device of claim 8 wherein a substantial portion of the tactile panel is in direct contact with the nonporous concrete slab.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) These and other features, aspects and advantages of the present invention will become better understood with reference to the following description, appended claims, and accompanying drawings where:

(2) FIG. 1 is a top view of a first embodiment of a perforated tactile warning device of the present invention.

(3) FIG. 2 is a cross section view of an embodiment of a perforated tactile warning device of the present invention.

(4) FIG. 3 is a detail cross section view of an embodiment of a perforated tactile warning device of the present invention.

(5) FIG. 4 is a top view of a second embodiment of a perforated tactile warning device of the present invention.

(6) FIG. 5 is a top view of a second embodiment of a perforated tactile warning device of the present invention.

(7) FIG. 6 is a top view of a second embodiment of a perforated tactile warning device of the present invention.

(8) FIG. 7 is a top view of a third embodiment of a perforated tactile warning device of the present invention.

(9) FIG. 8 is a top view of a third embodiment of a perforated tactile warning device of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

(10) The present invention will now be described more fully in detail with reference to the accompanying drawings, in which the preferred embodiments of the invention are shown. This invention should not, however, be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be complete and will fully convey the scope of the invention to those skilled in the art.

(11) FIGS. 1-3 depict a first embodiment of the perforated tactile warning device 100 of the present invention. The perforated tactile warning device 100 includes a tactile panel 110 having a plurality of perforations 112 and a porous concrete slab 120. The tactile panel 110 has a plurality of raised points, or domes 114 that are uniformly positioned across the tactile panel 110 in order to provide a slip-resistant surface that also acts as a warning system for disabled pedestrians. The tactile panel 110 is secured to the porous concrete slab 120 by a plurality of anchors 122. The anchors 122 are secured into anchor points 125 and support the tactile panel 110 between about 0.125 inches and about 0.5 inches above the porous concrete slab 120, creating a space 130 between the tactile panel 110 and the porous concrete slab 120.

(12) The space 130 solves several of the problems inherent in prior art devices. Infiltration of air and water both result in the degradation of existing devices through erosion of both the tactile warning panel and the underlying concrete substrate. The presence of space in these existing devices is eliminated in order to avoid air and water infiltration that would exacerbate an already significant weakness in the system. Air and water infiltration not only increase the degradation rate of the existing devices, resulting in rusted, warped and cracked tactile panels, but attempting to avoid air and water infiltration creates new hazards such as pooling around the warning devices. In colder climates, when pooling occurs around a warning device, the pooled water may freeze, creating a further hazard. In contrast, the combination of the space 130 and the porous concrete slab 120 in the perforated tactile warning device 100 addresses both of these problems by serving as a reservoir for the water that flows freely through the perforations 112 and also enabling effective management of the water via percolation through the underlying porous concrete slab 120. This passage of water through the perforated tactile warning device 100 is in stark contrast to prior devices and allows the perforated tactile warning device 100 to withstand stormwater runoff, melting and other water-related concerns, without compromising the structural integrity of the perforated tactile warning device 100.

(13) Ideally, the perforations 112 are holes with diameters between about 0.125 inches and about 0.5 inches, preferably about 0.1875 inches. The perforations 112 are sized large enough to allow water to flow through the tactile panel 110, yet not so large as to compromise the structural integrity of the tactile panel 110. The size and number of the perforations 112 can be adjusted to ensure that the perforated tactile warning device 100 is capable of handling the anticipated volume of stormwater.

(14) The perforations 112 may be evenly distributed across the tactile panel 110 so as to allow water to pass through the tactile panel 110 regardless of where the water contacts the tactile panel 110. For example, the perforations 112 may be centered between the domes 114 as shown in FIG. 1. Alternatively, the perforations 112 may be grouped along the edges of the tactile panel 110. For example, in some installations it may be advantageous to group the perforations 112 near the lower edge of the tactile panel 110 such that as water flows down the ramp it is directed toward the perforations 112 and consequently through the tactile panel 110 and into the porous concrete slab 120.

(15) While the porous concrete slab 120 is at least the size of the tactile panel 110, the porous concrete slab 120 may also be larger than the tactile panel 110 in one or more dimensions, creating a border of porous concrete in the perforated tactile warning device 100. In addition, the porous concrete slab 120 may include one or more lifting points 124 as known in the art in order to allow the perforated tactile warning device 100 to be lifted, removed and replaced as necessary. Where lifting points 124 are utilized within the porous concrete slab 120, there will be corresponding holes in the tactile panel 110 to allow access to the lifting points 124.

(16) Turning to FIGS. 4-6, a second embodiment of the perforated tactile warning device 200 is depicted. In this particular embodiment, the tactile panel 210 is secured to a porous concrete slab 220 that includes one or more channels 230. FIGS. 5 and 6 depict the perforated tactile warning device 200 with the tactile panel 210 removed to reveal the channels 230 in the porous concrete slab 220. In addition, the dashed line depicted in FIGS. 5 and 6 represents the location of the removed tactile panel 210. The channels 230 allow the tactile panel 210 to be secured to the porous concrete slab 220 via one or more anchor points 225, with limited space between the tactile panel 210 and the porous concrete slab 220. In some embodiments, the space between the tactile panel 210 and the porous concrete slab 220 can be eliminated such that a substantial portion of the tactile panel 210 is in direct contact with the porous concrete slab 220.

(17) The channels 230 in the porous concrete slab 220 may be oriented and sized based on the expected amount of water infiltration and the structural requirements of the porous concrete slab 220. For example, the channels 230 may be arranged substantially parallel to one another as depicted in FIG. 5, or in a grid pattern as depicted in FIG. 6. To allow the water to drain through the tactile panel 210, the tactile panel 210 includes perforations 212. The perforations 212 may be arranged about the tactile panel 210 in a manner that positions the perforations 212 substantially above the one or more channels 230 in the porous concrete slab 220, such that surface water may drain through the perforations 212, collect in the channels 230, and then percolate through the porous concrete slab 220.

(18) While the porous concrete slab 220 is at least the size of the tactile panel 210, the porous concrete slab 220 may also be larger than the tactile panel 210 in one or more dimensions, creating a border of porous concrete in the perforated tactile warning device 200. In addition, the porous concrete slab 220 may include one or more lifting points 224 as known in the art in order to allow the perforated tactile warning device 200 to be lifted, removed and replaced as necessary. Where lifting points 224 are utilized within the porous concrete slab 220, there will be corresponding holes in the tactile panel 210 to allow access to the lifting points 224.

(19) Turning to FIGS. 7 and 8, a third embodiment of the perforated tactile warning device 300 is depicted. In this particular embodiment, the tactile panel 310 is secured to a nonporous concrete slab 320 that includes one or more channels 330 and one or more drainage holes 340. FIG. 8 depicts the perforated tactile warning device 300 with the tactile panel 310 removed to reveal the channels 330 and the drainage holes 340 in the nonporous concrete slab 320. In addition, the dashed line depicted in FIG. 8 represents the location of the removed tactile panel 310. In order to allow the water in the channels 330 to permeate the nonporous concrete slab 320, the drainage holes 340 are located within the channels 330 and extend through the nonporous concrete slab 320. In some embodiments, the channels 330 may be sloped such that gravity causes water to be directed to the drainage holes 340. The channels 330 and the drainage holes 340 may be oriented and sized based on the expected amount of water infiltration and the structural requirements of the nonporous concrete slab 320. For example, as depicted in FIG. 8, the channels 330 may be arranged in a grid pattern, with the drainage holes 340 located at the intersection of one or more channels 330. Alternatively, the channels 330 may be arranged substantially parallel to one another, with drainage holes 340 positioned within the channels 330.

(20) The presence of the channels 330 and drainage holes 340 allows the tactile panel 310 to be secured to a nonporous concrete slab 320 via one or more anchor points 325, with limited space between the tactile panel 310 and the nonporous concrete slab 320. In some embodiments, the space between the tactile panel 310 and the nonporous concrete slab 320 can be eliminated such that a substantial portion of the tactile panel 310 is in direct contact with the nonporous concrete slab 320. To allow the water to drain through the tactile panel 310, the tactile panel 310 includes perforations 312. The perforations 312 may be arranged about the tactile panel 310 in a manner that positions the perforations 312 substantially above the one or more channels 330 in the nonporous concrete slab 320, such that surface water may drain through the perforations 312, collect in the channels 330, and then pass through the nonporous concrete slab 320 via the drainage holes 340.

(21) While the nonporous concrete slab 320 is at least the size of the tactile panel 310, the nonporous concrete slab 320 may also be larger than the tactile panel 310 in one or more dimensions, creating a border of nonporous concrete in the perforated tactile warning device 300. Alternatively, while the perforated tactile warning device 300 may utilize a nonporous concrete slab 320, porous concrete may be poured adjacent to the perforated tactile warning device 300 to increase drainage capacity.

(22) Similar to the porous concrete slabs 120, 220 detailed above, the nonporous concrete slab 320 may include one or more lifting points 324 in order to allow the perforated tactile warning device 300 to be lifted, removed and replaced as necessary. Where lifting points 324 are utilized within the nonporous concrete slab 320, there will be corresponding holes in the tactile panel 310 to allow access to the lifting points 324.

(23) It is noted that the foregoing examples have been provided merely for the purpose of explanation and are in no way to be construed as limiting of the present invention. While the present invention has been described with reference to exemplary embodiments, it is understood that the words, which have been used herein, are words of description and illustration, rather than words of limitation. Changes may be made, within the purview of the appended claims, as presently stated and as amended, without departing from the scope and spirit of the present invention in its aspects. Although the present invention has been described herein with reference to particular means, materials and embodiments, the present invention is not intended to be limited to the particulars disclosed herein; rather, the present invention extends to all functionally equivalent structures, methods and uses, such as are within the scope of the appended claims.