Propeller nut and fairwater

Claim 1

In a fairwater anode device adapted to threadedly engage the rear end of a propeller shaft and having a forward end face for engaging the rear face of a propller hub for retaining same on the propeller shaft, the improvements comprising; a. said device comprisinG a nut having wrench flats disposed rearwardly of said forward end face adapted to be engaged by a wrench for applying the nut to the shaft or removing same therefrom, b. a hollow integral projection extending axially and rearwardly from said flats having a wall at the rear end thereof, c. a removeable hollow anode having a circular outer surface, tapering inwardly toward its rear end to provide a fairwater exterior surface, surrounding said nut and having a front face disposed adjacent said forward end face of said nut, d. said anode also having internal surfaces engaging said flats, whereby the flats drivingly engage same, e. said anode further having a rear wall disposed rearwardly of the rear wall of the projection, f. a threaded member, such as a screw, extending through a central aperture in the rear wall of the anode and cooperating with the rear wall of the projection for drawing said walls relatively toward each other, g. the construction being such that the nut may be applied to the propeller shaft to secure the propeller hub thereto, after which the anode may be telescoped over the nut, and finally, the threaded member may be applied to secure the anode to the nut, the anode adapted to be removed and replaced without removing the nut, whereby only the anode is expendable.