Boat jacks
OwnerBoyd Sadlerinventor
Life of this patent
Estimating the term…
Abstract
Boat jacks operable in pairs to lift a boat off a wheeled carrier, each jack resting on a "T"-shaped base and supported by a tripod, each jack being specially modified by providing a horizontal lifting member on the front of the jack component that is movable up or down by a cranking arm, each horizontal lifting member being lodgable in longitudinally extending side channels provided on the hull of a boat, each base being clear of the boat, and a connecting chain provided between the horizontal lifting members to furnish additional lifting support to the jacks and to prevent their lateral movement one away from the other.
Claims5
In a boat jack system involving boat jacks operable in laterally opposing pairs to lift a boat onto or off a carrier therefor, each boat jack including a tripod support, a center pole containing a vertically movable jack component and a manually operable cranking arm for moving said jack component, the improvement which comprises providing a T-shaped base for said tripod support, the top of the "T" facing the front of said jack, a horizontal tubular lifting member being mounted to a lifting bar therefor, said lifting bar mounted in turn to said movable jack component, an elongated chain detachably mountable to and between each said horizontal lifting member and lifting bar, intermediate the ends of said chain in a generally central position there being mounted a support tube, said elongated chain providing simultaneous lifting support to said jacks and prevention of their lateral movement when liftingly engaged with said boat.
Dependencies are inferred from the claim text.