Hydro torque skeg foil
AssigneeOutboard Marine Corporation
InventorDonald A. Henrich
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a marine propulsion device including a downwardly extending propulsion leg, the lower end of the propulsion leg including a gear case, a drive shaft housed in the propulsion leg, a propeller shaft located in the gear case, and a propeller mounted on the propeller shaft, rotary operation of the marine propulsion device producing a steering torque on the propulsion leg. The propulsion leg also includes a skeg extending downwardly from the gear case, the rearward edge of the skeg comprising a foil for producing a torque on the propulsion leg opposite to the torque produced by rotary operation of the marine propulsion device.
Claims8
A marine propulsion device comprising a downwardly extending propulsion leg including a lower end having a gear case, a drive shaft housed in said propulsion leg, a propeller shaft located in said gear case and driven by said drive shaft, a propeller mounted on said propeller shaft, whereby rotary operation of the marine propulsion device produces a steering torque on the propulsion leg, a skeg extending downwardly from said gear case, said skeg including a body portion having a rearward edge, and means for producing a torque on said propulsion leg opposite to the torque produced by rotary operation of the marine propulsion device, said torque producing means including a foil removeably secured to said rearward edge of said body portion.
A marine propulsion device comprising a downwardly extending propulsion leg including a lower end having a gear case, a drive shaft housed in said propulsion leg, a propeller shaft located in said gear case and driven by said drive shaft, a propeller mounted on said propeller shaft, whereby rotary operation of the marine propulsion device produces a steering torque on said propulsion leg, a skeg extending downwardly from said gear case, said skeg having a pair of opposite lateral surfaces, and a rearward portion having a configuration producing a steering torque on said propulsion leg when water flows past said skeg and opposite to the steering torque produced by rotary operation of the marine propulsion device, one of said lateral surfaces including a rearward portion comprising a convex surface extending substantially from said gear case to the lower end of said skeg, and the other of said lateral surfaces including a rearward portion comprising a positive pressure surface extending substantially from said gear case to said lower end of said skeg.
Dependencies are inferred from the claim text.