Outboard boat propulsion installation
AssigneeThompson Marine Propulsion Systems, Inc.
InventorMerall L. Thompson
Life of this patent
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Abstract
Two centrifugal pump and paddle type boat propulsion devices are mounted in astern outboard positions on two swingable vanes, respectively, projecting aft of a boat hull, spaced athwartships of the hull and swingable from positions inclined rearwardly and downwardly from the hull transom into upwardly and rearwardly inclined positions in which the rotors of the propulsion devices and rudders behind them are retracted above the level of the boat bottom.
Claims13
In a boat having a hull, the combination comprising a generally horizontal trimming vane mounted on the boat hull transom, extending a considerable distance athwartships of the hull and having an aperture therethrough spaced inward from an outboard edge thereof, a stern outboard propulsion device including a housing mounted on said trimming vane over said vane aperture and a rotor received in said housing, mounted for rotation about a generally horizontal athwartships axis therein and having generally radial blades with the lower end portions of said blades in their lower positions projecting downward through said trimming vane aperture into the water beneath said trimming vane.
In a boat having a hull, a propulsion device including a housing mounted on the boat hull and a rotor received in said housing mounted for rotation about a horizontal athwartships axis therein and having two side shroud plates and an intermediate partition between said shroud plates defining compartments at opposite sides of said partition, said housing having an opening in a side thereof axially of said rotor in communication with a first one of said compartments and out of communication with a second one of said compartments, the first one of said compartments having impeller blades therein and the second one of said compartments having paddle blades therein, and means for supplying water to said housing opening, the periphery of said rotor being open and the lower portion of said housing having an opening therein for projection therethrough of the lower portions of said rotor blades when in their lower positions.
A boat propulsion device comprising a housing, a rotor received in said housing and rotatable about a generally horizontal athwartships axis, said housing having an opening in one side thereof axially of said rotor, an elbow having one end portion connected to said housing opening and its other end portion directed downward for supplying water to said housing through said housing opening, said rotor having a side shroud plate with an aperture in its central portion opposite said housing opening and an annular wall encircling said aperture and forming a recess of a depth measured along said axis approximately one-half of the width of said rotor measured along said axis, a drive shaft coaxial with said rotor axis mounting said rotor, and stationary bearing means encircling said drive shaft and extending into said recess approximately to the center of said rotor.
A boat propulsion device comprising a housing, a rotor received in said housing and rotatable about a generally horizontal athwartships axis, said housing having an opening in one side thereof axially of said rotor, an intake elbow having one end connected to said housing opening and its other end portion directed downward, means mounting said housing on the boat with said downwardly directed elbow portion end submerged when the boat is traveling at low speed for supplying water to said housing through said elbow and said housing opening, and valve means in said intake elbow operable to constrict the passage of water through said elbow to said housing opening when the boat is traveling at high speed and the end of said downwardly directed end portion is raised substantially to the surface of the water because of such boat speed.
Dependencies are inferred from the claim text.