Patent ID: 8852220

Claim:
A device for penetrating occlusive material in a body lumen comprising: an outer tube; an intermediate tube, at least a portion of the intermediate tube being moveably disposed within the outer tube; an inner tube, at least a portion of the inner tube being moveably disposed within the intermediate tube, the inner tube including a penetrating member operatively connected with the inner tube; a first dynamic member operably connected to the intermediate tube and the inner tube, the first dynamic member being moveable between a first position in which the first dynamic member is substantially longitudinally elongated and configured to penetrate the occlusive material with the penetrating member and a second position in which the first dynamic member is substantially radially expanded and configured to anchor the first dynamic member within the occlusive material; and a second dynamic member operably connected with the intermediate tube and the outer tube, the second dynamic member being moveable between a first position in which the second dynamic member is substantially elongated and configured to penetrate the occlusive material and a second position in which the second dynamic member is substantially radially expanded and configured to anchor the second dynamic member within the occlusive material and to support movement of the first dynamic member; a proximal handle operatively connected to the first dynamic member, an intermediate handle operatively connected to the first dynamic member and the second dynamic member, and a distal handle operatively connected to the second dynamic member; wherein said first dynamic member is independently moveable relative to said second dynamic member with said second dynamic member in said second position, said second dynamic member being configured to resist distal longitudinal movement as said first dynamic member, in said first position, advances distally relative to said second dynamic member; and wherein the first dynamic member is moved into the second position when the distal and intermediate handles are distally separated from the proximal handle, and the second dynamic member is moved into the second position when the intermediate and proximal handles are separated proximally from the distal handle.