Patent ID: 7351013

Claim:
A unitary pile jacking sleeve comprised of: a bottom sleeve section, an intermediate sleeve section and a top sleeve section, said bottom sleeve section, intermediate sleeve section and top sleeve section being adapted to structurally support a design load; said bottom sleeve section having an open bottom end and a top end attached to said intermediate section, and said bottom section being adapted to receive through said open bottom end of said bottom section the top end of a bottom pile that has a bottom end secured in a ground; said top sleeve section having an open top end and a bottom end attached to said intermediate section, and said top section being adapted to receive the bottom end of a top pile that extends from the open top end to a supported structure, and said design load being greater than the weight of the top pile; and said intermediate sleeve section being disposed between and adjoining said top sleeve section and said bottom sleeve section; and further comprising a floating plate separating the intermediate sleeve section from the top sleeve section.