Capstan

A capstan for hauling a marine vessel by way of a rope, comprising:

• a base,
• a motor having a housing comprising a lower bracket fixed to said base, a cylindrical wall fixed at its lower end to said lower bracket and an upper bracket fixed to the upper end of said cylindrical wall, a stator inside said cylindrical wall and a rotor having a shaft rotatably supported by a bearing in said lower bracket and a bearing in said upper bracket,
• an eccentric cam fixed on an upward extension of said shaft, a planet gear having teeth on its periphery, a central opening rotatably receiving said cam and a plurality of secondary openings arranged in a circle around and spaced from said central opening,
• a plurality of pins fixed to said upper bracket and extending up through said secondary openings in said planet gear and a support bracket fixed to upper ends of said pins, said support bracket having a central bearing rotatably supporting said upward extension of said shaft, and
• a drum comprising a generally cylindrical body surrounding said motor and having a negative crown, a top cover fixed to an upper end of said body and a bottom cover fixed to a lower end portion of said body, means rotatably supporting said drum comprising a lower bearing in a central opening of said bottom cover bearing on a downwardly extending central portion of said lower bracket and an upper bearing in a central recess of said top cover and bearing on an upwardly projecting central portion of said support bracket, and an internal ring gear fixed in an upper portion of said body in position to mesh with said planet gear and having at least one more teeth than said planet gear.