US Patent 7963911 Locomotive endoscope assembly for fluid supply

Apparatus for fluid supply to the interior of a portion of a tubular body portion including a locomotive endoscope head extending along a longitudinal axis and having a first selectably radially extendible sealing element and a second selectably radially extendible sealing element, wherein at least one of the first and second selectably radially extendible sealing elements is axially displaceable with respect to the other, a fluid passageway operative for supplying fluid intermediate the first and second selectably radially extendible sealing elements and a locomotive endoscope head controller controlling the operation of the locomotive endoscope head and being operative for controlling selectable extension of the first and second selectably radially extendible sealing elements, axial displacement of the at least one of the first and second selectably radially extendible sealing elements, and fluid introduction through the fluid passageway.