Patent ID: 8764640

Claim:
An apparatus configured to access a passageway comprising: a visualization apparatus configured to visualize an interior surface of the passageway; a tube being configured to receive the visualization apparatus; a helically-wound thread disposed on an outer wall of the tube and configured such that rotation of the tube causes the tube with the visualization apparatus to move along the passageway; an inner rotor disposed in the visualization apparatus; a watertight cover being configured to cover an outer surface of the inner rotor such that the watertight cover separates inside and outside of the visualization apparatus, the inner rotor being configured to contact with an interior surface of the watertight cover, wherein one or more projections are configured to form on an outer surface of the watertight cover; and an outer rotor configured to engage the one or more projections such that rotary motion of the inner rotor is transferred to the outer rotor across the one or more projections, the tube being configured such that the tube is coupled with the outer rotor, wherein the rotary motion transferred across the one or more projections causes the tube to rotate with the outer rotor.