71408 ⎘
Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction; Propellers; Other means for improving propeller efficiency Propeller hub caps with fins having a pitch different from pitch of propeller blades, or a helix hand opposed to the propellers' helix hand
Surf thrust system
#2Hybrid propulsor for watercraft
#3Unidirectional torque boosting propeller
#4Apparatus and system for propeller blade aft retention
#5Peripheral tunnels propeller with alternative balance
#6Arrangement for multi screw vessels comprising external propeller shafts as well as method for producing such an arrangement
#7Propulsion device for ship
#8Boat propeller nut
#9Propeller arrangement, in particular for watercraft