Controllable pitch maripropeller

Claim 1

A pitch change hub for a marine propeller, comprising a hollow structural casing having a rounded outer wall and a central axis, and having integrally formed therein a forward mounting plate portion and a hollow post portion extending aft therefrom along said axis spacedly inward of said outer wall, first bearing means mounted in the wall of said casing on spindle axes extending outward substantially radially from said central axis, second bearing means on said axes mounted in said hollow post portion, blade spindles supported by said first and second bearing means, gear means mounted on and rotatable with each spindle positioned between said first and second bearing means, worm gear means, rotatable on axes parallel to said central axis and extending spacedly adjacent to each said spindle axis, to engage said spindle-mounted gear means, control motor means within the hollow post portion having an output shaft on said central axis, and gear reducer means, of the type having a central input, a peripheral output, and a mounting provision spaced therebetween, mounted on the end of said hollow post portion aft of said second bearing means, coupling all said worm gear means to said control means on the central axis.