KEEL ROLLER FOR A BOAT TRAILER

摘要

This invention relates to a keel roller for a boat trailer which includes an elongate body rotatably mountable on the trailer. The body is characterized by having a centrally located peripheral groove and opposed side portions each of which are located adjacent the groove. Each side portion comprises oppositely handed helical threads thereby providing a plurality of hills and valleys. The height of each hill decreases progressively toward the centrally located groove so that the periphery of each side portion converges or tapers inwardly towards the centrally located groove. Each hill is substantially arcuate so that when a boat is drawn onto the trailer from its rear with the boat keel on the roller, the tapered oppositely threaded side portions of the elongate body produce a gravitational sliding effect whereby the keel, if displaced from the centrally located groove, readily attains its original position in the groove to thereby reduce fouling of the keel to a minimum when the boat is drawn onto the trailer.