Patent ID: 7249911
Filing Date: 2007-07-31
Classification: E01C,E01F

Abstract:
1. A modular detectable-warning truncated-dome device for cautioning pedestrians traversing a walkway proximal a danger-zone; said device comprising; a one-piece safety-button structure having a domed top-side in combination with a substantially planar bottom-side, measuring in breadth no less than ¾-inch and no more than 1 and ½-inch, while measuring in thickness no less than 3/16-inch and no more than 5/16-inch;said bottom-side provided with a bonding surface means for permanently affixing said safety-button to an existing pavement-surface via a conventional substrate bonding-agent means, and permanently arranged in a spaced apart plurality creating a co-operative foot-tactile warning-field upon an existing walkway-pavement; said safety-button bottom-side bonding surface means is characterized as a downwardly projecting subterranean-boss portion for insertion intimately into a retention-hole prepared into said walkway-pavement surface, and including means of retention therein; said downwardly projecting subterranean-boss portion is made substantially smaller than said safety-button breadth, whereby said bottom-side portion annular to said subterranean-boss provides a radial-extension effectively serving as an insertion-limit abutment interfacing upon said walkway-pavement surface; and said subterranean-boss portion is formed with a tapering body larger in diameter at its lower most terminus, thereby creating a captive positive-retention condition relative to said bonding-agent.