Patent ID: 9249625
Filing Date: 2016-02-02
CPC Classification: E06C

Claim Text:
1. An attachment apparatus suitable for use with a ladder having a plurality of rungs, at least one of said rungs comprising a central bore having an internal dimension, said attachment apparatus comprising: a frustro-conical wedging section formed from a resilient material, said frustro-conical wedging section configured for wedging into said central bore for attachment thereto, said frustro-conical wedging section further comprising a plurality of axially extending ribs, wherein said ribs radially project outwardly from said frustro-conical wedging section, each rib longitudinally extends from a narrowest diameter end of the frustro-conical wedging section to a greatest diameter end of the frustro-conical wedging section, the height of the outwardly projection of each rib away from the frustro-conical wedging section substantially linearly increases beginning from the narrowest diameter end of said frustro-conical wedging section to the greatest diameter end of said frustro-conical wedging section, each rib is separated from an adjacent rib by a groove and each groove has a first end and a second end which are distally opposed from one another, the first end of each groove narrows to a point and terminates at the point such that the end portion of the adjacent ribs located at the narrowest diameter of the frustro-conical wedging section contact one another, the second end of each groove is wider than the first end of each groove; an elongate engaging section whose cross-sectional dimension is less than said internal dimension of said central bore, the elongated engaging section is integrally connected with the frustro-conical wedging section at the narrowest diameter of the frustro-conical wedging section and longitudinally extends away therefrom in a first axial direction; and a handle section adapted to permit a user to insert the frustro-conical wedging section into the central bore, the handle section comprising a gripping portion and a flange, the flange being located between the gripping portion and the frustro-conical wedging section, the flange being sized to prevent the handle section from being inserted into the central bore, the handle section is integrally connected with the frustro-conical wedging section via the flange at the greatest diameter of the frustro-conical wedging section and extends away therefrom in a second axial direction which is opposed to the first axial direction.