Patent ID: 11859402
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 13:
14. The apparatus described in claim 13 above, wherein:
(a) said pair of essentially parallel support plates further comprising an upper hole aligned with a corresponding upper hole of the other support plate;
(b) each of said converging tip regions of the respective pivotable 1st and 2nd support legs further comprising an upper bore aligned with said respective upper holes and near the terminal tip, and along a plane closely parallel to said diagonal planar cutaway, each respective upper bore and upper holes receiving a removable fastening pin;
wherein, when a respective 1st or 2nd support leg is in the vertical compacted position, said respective upper holes of said opposing support plates are aligned with said respective upper bore near said terminal tip, so that inserting said fastening pin therethrough locks the respective 1st or 2nd support leg in the compacted position, while inserting said fastening pin through the respective upper holes in the support plates when the respective 1st or 2nd support leg is in the free-standing position chocks against the respective 1st or 2nd support leg to fix the respective 1st or 2nd support leg in the free-standing position.