Patent ID: 8353817
Filing Date: 2013-01-15
Classification: A61B,A61M,G02B

Abstract:
1. A propulsion apparatus for transport of at least one accessory device within a body cavity or canal, section of pipe, lumen, or other generally tubular space or environment, the apparatus comprising: an enclosed ring including at least one first section and at least one second section having a more wear resistant construction than the first section, the enclosed ring defining a central cavity and having an interior volume; a frame including an outer support structure located within the interior volume of the enclosed ring, and an inner support structure that is disposed in the central cavity of the enclosed ring; and at least one interlocking member located in association with each of the outer and inner support structures, the enclosed ring being positioned at least partially between the interlocking members of the outer and inner support structures, wherein the propulsion apparatus is configured to be sized and shaped to fit within and engage the body cavity, and both of the first and second sections revolve to turn outward to engage the body cavity and to turn inward to encompass the central cavity.