Security cone-door for a ladder
US8141682B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Aug 3, 2009 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Feb 4, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06C7/006
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A first embodiment of the security apparatus comprises a retaining collar; a plurality of segments forming a generally frusta-conical enclosure, with one or more of the segments having an access opening therein; and a lockable access door covering the opening. The retaining collar is separable into portions that conforms to the shape of the periphery and are coupled together around the structure. The segments have an upper portion that attaches to the collar; and have a bottom portion that extends radically downwardly from the collar at an angle of about 30 degree; with the radial edges interconnected forming the enclosure.A second embodiment of the apparatus secures a ladder supported on a wall and a retaining bar; a plurality of segments forming a generally semi-frusta-conical enclosure, with one or more of the segments having an access opening therein; and a lockable access door covering the opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.