Patent ID: 6537031
Filing Date: 2003-03-25
Classification: B63H

Abstract:
A marine propeller comprisinga hollow hub body (11), a plurality of propeller blades (16) distributed about the hub body (11) and detachably secured to it in engagement with an external bearing surface (14C) on a wall of the hub body, a plurality of fastening devices (19,21) for each propeller blade (16), each fastening device including a tension rod (19) which extends from the cavity (11A) of the hub body (11) through openings (20) in the wall of the hub body and is anchored in the hub body, and a flange member (22) mounted on the tension rod and supported against the side of the hub body wall (14) facing the cavity (11A) of the hub body, characterised in that the flange member (22) of each fastening device (19,22) has a plurality of recesses (23) distributed about the tension rod (19) and tensioning members (24) received in the recesses, the tensioning members (24) being extendable from the flange member (22) towards the hub body wall (14) to apply tension to the tension rod (19).