Quotables
"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7371140 | Protective marine vessel and drive A marine vessel and drive combination includes port and starboard tunnels formed in a marine vessel hull raising port and starboard steerable marine propulsion devices to protective positions relative to the keel. ... | 05/13/2008 |
| 7234983 | Protective marine vessel and drive A marine vessel and drive combination includes port and starboard tunnels formed in a marine vessel hull raising port and starboard steerable marine propulsion devices to protective positions relative to the keel. ... | 06/26/2007 |
| 7101236 | Marine propulsion unit A marine propulsion unit utilizing a turbine engine is provided as a drop-in module. The propulsion unit includes a base which forms a part of the hull. The propulsion unit includes a drive unit which is mounted to the engine. Both the engine and the drive unit are ... | 09/05/2006 |
| 6544081 | Boat hull with tunnel structure A boat hull having a tunnel structure along the bottom of the hull in the form of a truncated hollow partial cone indentation parallel to the keel of the boat. The tunnel has a truncated end attached to the bottom of the hull near the keel and an open end... | 04/08/2003 |
| 6305994 | Hull for dual electric motor marine propulsion system A hull for a marine propulsion system includes recesses for receiving and protecting propellers of the propulsion systems. The hull may be designed with a pair of recesses, such as in a stern region, in which props of two separate electrically driven prop... | 10/23/2001 |
| 5111763 | Steering unit for barges A steering unit (10) for a barge tow (12). The steering unit (10) has a hull (16) which includes a pair of spaced longitudinally extending portions (50, 52) and defining a cavity or tunnel (54) therebetween. A propeller (48) and rudder (36) are mounted wi... | 05/12/1992 |
| 5098321 | High performance boat prop guard with high strength attachment bracket A propeller guard including a cylindrically shaped ring which includes a plurality of evenly spaced openings therethrough. The openings in the ring are formed so as to allow water to pass therethrough during operation so as to improve the performance char... | 03/24/1992 |
| 4941423 | Marine propulsion system A propulsion system for high-speed powerboats whereby the water level in a tunnel containing a surface-piercing propeller is controlled by admitting external air into the tunnel through an air outlet in the tunnel forward of the propeller. The air is admi... | 07/17/1990 |
| 4700654 | Propulsion device for swimmers and divers A motorized propulsion device for swimmers and scuba divers which is to be attached to the user's forearms. The battery, motor, propeller and propeller shroud are arranged in a compact, linear, hydrodynamic manner. The watertight housing may have one or m... | 10/20/1987 |
| 4629432 | Elastically supported thruster structure A propeller thruster installation includes a propeller unit rigidly supported in an inner tunnel tube which in its turn is elastically coaxially supported in an outer tunnel tube which is rigidly secured to the hull of a ship. In order to reduce the trans... | 12/16/1986 |
| 4622016 | Tunnel wedge A full or partial tunnel wedge is positioned in the propeller shaft tunnel ft of the propeller on a waterborne craft. The size and angle of the wedge is determined by the characteristics of the particular craft. The wedge converges water flow and increases... | 11/11/1986 |
| 4391593 | Propulsion drive systems A propulsion drive system for a boat is provided where a propeller is centered within a tunnel. A converging channel, open towards the bottom, extends in front of the tunnel and a converging nozzle extends from the rear of the tunnel. The system is provid... | 07/05/1983 |
