US Patent 7320698 Emboli capturing device and method of manufacture therefor

An intravascular filter device comprising a frame having an open configuration and a closed configuration, the frame comprising a plurality of elongate members each having a proximal end and a distal end, and a proximal region and a distal region and being fixedly connected at the proximal end to each other; and a filter having an open end and a closed end disposed on the frame; wherein the elongate members have a bend distal the proximal region and a helical curve over a substantial length of the distal region when the elongate members are in the open configuration.