초록 ▼

A boat support framework including an elevating cradle supported between a plurality of cable and pulley containing lift towers via a plurality of roller bearings in engagement therewith. A cable take up axle includes separate cable drums and cables to each lift tower and is controlled from a handwh

A boat support framework including an elevating cradle supported between a plurality of cable and pulley containing lift towers via a plurality of roller bearings in engagement therewith. A cable take up axle includes separate cable drums and cables to each lift tower and is controlled from a handwheel or winch operated articulating drive arm and multiple endless chains coupled therebetween. Hinged frameworks pivotally coupled to cross frame members of a base frame and the cradle articulate to support the cradle over the range of lift travel.

대표청구항 ▼

Boat lift apparatus comprising: a) a base framework having a plurality of interconnected frame members and including a plurality of vertical columns; b) cradle means including a plurality of rollers cooperating with multiple surfaces of each column for supporting a boat between said vertical columns

Boat lift apparatus comprising: a) a base framework having a plurality of interconnected frame members and including a plurality of vertical columns; b) cradle means including a plurality of rollers cooperating with multiple surfaces of each column for supporting a boat between said vertical columns; c) means for raising and lowering said cradle means including an axle rotatively mounted to said cradle means and a plurality of pulleys and cables, wherein each cable is coupled at one end to said axle and trained about a respective pulley secured to an upper portion of each of said columns; and d) drive means for rotating the cradle means axle to raise and lower said cradle means including first and second support frames and first and second endless chains respectively secured to said first and second support frame and means for pivotally coupling said first and second support frames to one another and between one of said columns and the cradle means axle, whereby said drive means articulates to follow cradle means movement.