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A marine propulsion device comprising an engine, a lower unit adapted to be mounted on the transom of a boat for pivotal movement relative thereto about a generally vertical steering axis, the lower unit including a lower gearcase having therein lubricant, and a propeller rotatably supported by the

A marine propulsion device comprising an engine, a lower unit adapted to be mounted on the transom of a boat for pivotal movement relative thereto about a generally vertical steering axis, the lower unit including a lower gearcase having therein lubricant, and a propeller rotatably supported by the lower gearcase, a generally vertical drive shaft rotatably supported in the lower unit and including an upper end driven by the engine, a lower end drivingly connected to the propeller, an axial bore extending upwardly from the lower end and defining a sleeve portion of the drive shaft, and an aperture extending radially through the sleeve portion, and internal threads within the axial bore for pumping lubricant from the lower gearcase upwardly through the axial bore to the aperture so that the lubricant flows outwardly through the aperture.

대표청구항 ▼

A marine propulsion device comprising an engine, a lower unit adapted to be mounted on the transom of a boat for pivotal movement relative thereto o about a generally vertical steering axis, said lower unit including a lower gearcase having therein lubricant, a generally vertical drive shaft rotatab

A marine propulsion device comprising an engine, a lower unit adapted to be mounted on the transom of a boat for pivotal movement relative thereto o about a generally vertical steering axis, said lower unit including a lower gearcase having therein lubricant, a generally vertical drive shaft rotatably supported in said lower unit and including an upper end driven by said engine, a lower end extending into said gear case and adapted to be drivingly connected to a propeller, and an axial bore extending upwardly from said lower end, and means providing internal threads within said axial bore for pumping lubricant from said lower gearcase upwardly through said axial bore.