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| Number | Title | Issue Date |
| 4642059 | Marine contra-rotating propeller apparatus A marine contra-rotating propeller apparatus for propelling a ship by contra-rotating propellers is characterized by the provision of an inner shaft having one end directly coupled to an output shaft of a main diesel engine and the other end to which an o... | 02/10/1987 |
| 4609362 | Non-soniferous power drive for underwater vehicles The system provides propulsion of an underwater vehicle without the need noise producing gears or internal combustion engines. Variable speed of two impellers is automatically controlled from a single hydraulic piston regardless of depth, as is the hori... | 09/02/1986 |
| 4571192 | Self propelled spherical vehicle A self-propelled spherical vehicle (10) for operation in a fluid medium utilizes an impeller (12) of approximately half the diameter of the sphere for propulsion. In addition to driving the vehicle, the impeller acts to draw the flow of fluid smoothly ove... | 02/18/1986 |
| 4540369 | Counterrotating dual-propeller boat drive A propeller assembly is usable in combination with a watercraft drive unit having a generally horizontal drive support tube fixed on the craft and a drive shaft projecting from the rear end of the support and rotatable about a drive axis. The drive assemb... | 09/10/1985 |
| 4360348 | Underwater vehicle porting system Propulsion apparatus for an undersea vehicle comprises a pair of counter-ating low speed impellers driven from a spider shaft rotating at relatively high speed. The reduction is accomplished by a variable speed reducing and torque transmitting device whi... | 11/23/1982 |
| 4074652 | Steering and propulsion device for watercraft A two-stage axial flow steering and propulsion device has impellers operable by a right-angle reversible drive mounted on a watercraft, and a housing surrounds the blades of the impellers. The housing is mounted for rotation in opposite directions about a... | 02/21/1978 |
| 3978813 | Propeller-driven hydrophone array tensioning device A tensioning device for submarine oceanographic structures includes a sure float having a pendent line suspended therebeneath and a vertical rod support attached to the distal end of the pendent line. An electrical motor attached to the lower end of the ... | 09/07/1976 |
| 3967573 | Apparatus for stabilizing underwater devices An apparatus provided on a self-propelled underwater device connected to base by a cable. The apparatus comprises an auxiliary propeller disposed at the rear of the device in a support to which is secured the connecting cable and which is connected to t... | 07/06/1976 |
