Description: Patent for a new and improved hydraulic excavator. This design "consists in combining a submerged propeller-wheel with a water-jet tube having a flexible connection with the supply-pipe, so as to permit the water-jet tube to rise and fall . . . and also move laterally, whereby the tube will, when it meets an obstruction, yield sufficiently to prevent breaking, jarring, or injuring any of the parts, the water-jet tube and propeller bearing such relative positions to each other that the . . . obstructions disengaged by the jet will be held in suspension . . . and carried off by the natural current" (lines 14-27).
Date: January 15, 1884
Creator: Mansfield, Samuel M.
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