Patent ID: 11898361
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E  B | IPC B  E

Claim 5:
6. The device of claim 1, further comprising a wedge mechanism attached to the arm member of each of the hook portions on an interior surface of the arm member, the wedge mechanism comprising:
a wedge having un upper end, a lower end, and a pin receiving portion between the upper end and the lower end, the lower end having a V-shaped notch; and
a pin biased to a position within the pin receiving portion, wherein:
the wedge is attached to the arm member such that the lower end is biased away from the arm member;
the pin holds the wedge in a position perpendicular to the arm member when in the pin receiving portion; and
the wedge is in a position oblique to the arm member when the pin is not in the pin receiving portion.