초록 ▼

A boat lift for a berth having permanently positioned piles in pairs spaced apart a distance sufficient to permit the boat to be berthed thereat to move between the paired piles while in the water includes a cradle having fore and aft transverse members upon which the boat is supported out of the wa

A boat lift for a berth having permanently positioned piles in pairs spaced apart a distance sufficient to permit the boat to be berthed thereat to move between the paired piles while in the water includes a cradle having fore and aft transverse members upon which the boat is supported out of the water, a first pair of such piles equipped with first sheaves, a second pair of such piles with second sheaves, a third pair of such piles positioned between the first and second pairs adjacent the second second pair, first and second beams carried by the inside and outside piles of the second and third piles, motor driven winch drums supported by the first and second beams, third sheaves carried by the first and second beams, first inside and outside cables reeved respectively from the first and second drums via the first and second sheaves forward to the inside and outside piles of the first pair to lift the fore transverse member of the cradle, and second inside and outside cables reeved from the winch drums via the third sheaves to lift the aft transverse member of the cradle.

대표청구항 ▼

In a boat lift associated with a berth that includes permanently positioned piles at least some of which are in pairs spaced apart a distance sufficient to permit the boat to be berthed thereat to move between said paired piles while in the water at said berth, the improvement which comprises: a cra

In a boat lift associated with a berth that includes permanently positioned piles at least some of which are in pairs spaced apart a distance sufficient to permit the boat to be berthed thereat to move between said paired piles while in the water at said berth, the improvement which comprises: a cradle upon which said boat can be supported out of said water, said cradle including a first transverse member having an inside end and outside end and a second transverse member spaced apart from said first member having an inside end and outside end, a first pair of said piles including first sheave means, a second pair of said piles including second sheave means, a third pair of said piles positioned between said first and second pairs adjacent said second second pair, each of said pair of piles having an inside pile and an outside pile, a first and second beams carried respectively by said inside and outside piles of said second and third pairs, first and second motor driven winch drums supported respectively upon said first and second beams, third sheave means carried by said first and second beams, first inside and outside cables reeved respectively from said first and second drums via said first and second sheave means forward to said inside and outside piles of said first pair to lift said first transverse member, and second inside and outside cables reeved respectively via said third sheave means from said first and second drums to lift said second transverse member.