Patent ID: 7744604

Claim:
An actuator for acting upon a material in a vessel, comprising: a transport vehicle, a shape memory polymer basket operatively connected to said transport vehicle, said shape memory polymer basket adapted to move from a first collapsed tubular shape that can be moved through said vessel, to a second open basket shape for acting upon said material, wherein said shape memory polymer basket has an attachment portion and an expandable basket portion, wherein said expandable basket portion has a multiplicity of individual and separate leaves, wherein each of said individual and separate leaves has a body with an edge and wherein said body has a slit located entirely within said body extending substantially throughout said body and terminating before reaching said edge, wherein said individual and separate leaves have a width that forms a solid wall when said shape memory polymer basket is in said first collapsed tubular shape, and a heat transfer mechanism operatively connected to said shape memory polymer basket, adapted to transfer heat to said shape memory polymer basket to move said shape memory polymer basket portion from said first collapsed tubular shape to said second open basket shape.