B - Operations – Transporting – 63 – H
Patent
B - Operations, Transporting
63
H
115/12
B63H 23/02 (2006.01) B63H 5/125 (2006.01)
Patent
CA 1102630
ABSTRACT A marine propeller unit having a propeller mounted on a horizontal propeller shaft which is journalled in a gear housing, which is fixedly connected to a hollow strut whose upper end is mounted in the bottom of a water-going vessel for rotation about a substantially vertical axis. The propeller is driven by a drive machinery within the vessel. Two conical gears on the propeller shaft are coupled to two vertical gear-drive shafts journalled within the strut. The two gear-drive shafts are coupled by their respective cylindrical gears to an inner vertical drive shaft and an outer tubular drive shaft respectively, said tubular drive shaft being arranged outside said inner drive shaft and coaxial therewith. These coaxial drive shafts are connected together and to the output shaft of the drive machinery by means of resilient couplings in a manner such as to permit said shafts to be driven together. Because the power to the propeller shaft is distributed between duplicate gears and shafts, the dimensions of the gear housing and strut can be such as to ensure that the propeller efficiency is not excessively reduced, even when high propeller power is required. By means of torsion ill the coaxial shafts and through the resilient couplings, the power to the gears is so distributed as to prevent them from being overloaded.
336428
Aktiebolaget Karlstads Mekaniska Werkstad
Fetherstonhaugh & Co.
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