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US 6,663,449 B1Granted
Low frontal area, inboard, through-hull propeller drive
OwnerManfred Quaeckinventor
Life of this patent
Estimating the term…
Abstract
The propeller drive is installed with its drive shaft inside a boat hull and its driven (propeller) shaft outside. The shafts are interconnected by a timing chain. The drive shaft position is adjustable to adjust the distance between it and the driven shaft, thus adjusting tension in the chain. The drive shaft is carried in two bearings installed in two bearing carriers. The carriers are adjustably mounted on a drive shaft casing and are structurally interconnected. The adjustments are made by mechanical adjustment of the position of the interconnecting structure relative to the casing.
Claims7
A through-hull inboard propeller drive comprising:
- an upper subassembly,
- a lower subassembly,
- a drive shaft,
- a driven shaft,
- a chain,
- a drive sprocket,
- a driven sprocket
- said upper and lower subassemblies being connected, said drive sprocket being mounted on said drive shaft, said drive shaft and drive sprocket being carried in said upper subassembly, said driven sprocket being mounted on said driven shaft, said driven shaft and driven sprocket being carried in said lower subassembly, said chain interconnecting said drive and driven sprockets, said drive and driven sprockets being a distance apart and parallel, said upper subassembly further comprising apparatus for adjustment of said distance, said drive and driven shafts being constrained to remain parallel during said adjustment of said distance and being parallel when said adjustment is complete.
5 more elements
Dependencies are inferred from the claim text.