Patent ID: 8141682
Filing Date: 2012-03-27
Classification: E06C

Abstract:
1. A security apparatus for blocking unauthorized access for a ladder that is supported on a column structure, the apparatus comprising a retaining collar conforming to the shape of the periphery of the structure and having a separable portion with a coupling thereon for attaching the collar to the structure; a plurality of frusta-conical segments each having an upper portion, a bottom portion and radial edges, with each upper portion having means for attaching to said collar, and with each bottom portion extending radially downwardly at an angle ranging from about 25 to about 45 degrees from said collar, and with each segment for interconnection along the adjacent radial edges thereof forming a frusta-conical enclosure about 10 feet in diameter around the structure and the ladder for blocking unauthorized access to the ladder; and with at least one of said segments having an opening therein for providing clearance for the ladder and providing clearance for an authorized person to access the ladder; and an access door for the enclosure, for covering the opening providing clearance for the authorized person, and having a lockable means thereon for securing said door to the frusta-conical enclosure, for blocking unauthorized access to the ladder, wherein said means for attaching said segments to said collar include said collar having a plurality of flanges extending radially and downwardly at an angle therefrom ranging from about 25 to about 45 degrees, and the upper portions of said segments having fasteners for engaging the respective flanges of said collar.