Pump attachment for outboard motors

Claim 1

A pump unit for a motorboard having a screw disposed in the water when the motorboat is in the water, the screw constituting a propeller for moving the boat along in the water and constituting an impeller when the pump unit claimed hereinbelow is applied thereto, the motorboat also having a structure mounting the screw, the axis of rotation of the screw determining a longitudinal direction extending fore and aft, said pump unit comprising, a shell made up of a pair of halves capable of being put in an operable position laterally on opposite sides of a vertical plane containing the axis of rotation of the screw and having a longitudinal direction, and when in said operable position extending longitudinal fore and aft beyond the screw, and enclosing the screw entirely except for water intake and outlet openings referred to below, the halves when in said operable and enclosing position being interconnected at locations at the bottom and at the top, the shell halves being detachably so interconnected at at least one of their locations of interconnection, whereby to enable the shell to be detachably put in its said operable position, the shell when in its said operable position having its longitudinal direction lying in the direction of the axis of rotation of the screw, the shell halves having conformations operable, when the halves are in their said operable and enclosing position, for forming a water intake opening and a water outlet opening at fore and aft ends of the shell, said conformations being adapted for connection thereto of water lines communicating with said openings respectively, the shell halves being held in said operable and enclosing position solely by the interconnection therebetween and consequent confinement therebetween of elements of said mounting structure, to the exclusion of any other connections between either of the halves and said mounting structure, the shell halves having conformations engagable with said mounting structure when the shell is in its said operable and enclosing position, preventing displacement of the shell in all directions.