Boat lift

Details Boat lift Boat lift

1989-12-15

1991-09-24

Taylor, Dennis L.

Hydraulic and earth engineering

Marine vessel portage, launching, or removing

Lifting

114 44, 254338, B63C 306

Patent

active

050510274

ABSTRACT:
The Boat Lift has two support rods with a lower pulley connected to each end of each support rod. An upper pulley and a winding device with a ratchet are located above each lower pulley. Four cords and a winch are provided. Each cord has one end connected to one winding device and extends downward around its associated lower pulley; upward around its upper pulley; and has its other end coupled to the winch. Operations of the winch lowers and raises the support rods. The ratchets and winding devices are employed to allow the two support rods to be leveled.

REFERENCES:
patent: 735569 (1903-08-01), Nelssen
patent: 983957 (1911-02-01), Trantham
patent: 2529948 (1950-11-01), Jones
patent: 3661415 (1972-05-01), Piasecki
patent: 3697048 (1972-10-01), Sarno
patent: 4109896 (1978-08-01), Ragen
patent: 4329082 (1982-05-01), Gillis
patent: 4686920 (1987-08-01), Thomas

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