Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7267072 | Dry cargo submarine with air-charge cargo hold Submarines with air-charged cargo holds are provided. The pressurize hull of a traditional submarine's cargo hold is replaced by non-pressurized hull, which lowers costs for transporting dry cargo and solves strength and seal problems raised when providing large ope... | 09/11/2007 |
| 7246566 | Combination surface and submersible watercraft A modular watercraft capable of both surface and submersible accommodation and transport of passengers. In one embodiment of the submersible watercraft of this invention, the hull comprises air bladders, thereby avoiding the engineering complexity, weight and cost o... | 07/24/2007 |
| 7209288 | Snorkel device for a submarine An optical observation device is connected to an extendable and retractable snorkel tube for above-water observation during the snorkel travel (travel at periscope depth) of the submarine. The optical observation device is designed as a compact unit which consists o... | 04/24/2007 |
| 6976445 | Submarine A submarine is comprised of a hull with an external seat on top and a backrest behind the seat. A control column and a grab handle are positioned in front of the seat. External drive motors attached to the hull drive propellers housed in protective cages. Servo driv... | 12/20/2005 |
| 6941883 | Submerged underwater observation booth The invention concerns the structure of a “SUBMERGED UNDERWATER OBSERVATION BOOTH”, including a floating station on water surface, and a piping system to convey fresh air and power into the SUBMERGED BOOTH. The SUBMERGED BOOTH provides an atmospheric environment... | 09/13/2005 |
| 6763827 | Emergency air system for kayaks An emergency air system for kayaks is disclosed. The emergency air system can be coupled to a kayak skirt or may be coupled to the body of the kayak. The air system includes a breathing tube which includes a mouthpiece. Preferably, the breathing tube is secured to t... | 07/20/2004 |
| 5479871 | Emergency power system for submarines An emergency power generation system mounted in the aft portion of a submarine includes a gas turbine arranged to drive a generator and an exhaust gas outlet in the rudder structure of the submarine to reduce submarine construction cost and avoid contamin... | 01/02/1996 |
| 5237952 | Variable attitude submersible hydrofoil A watercraft having positive static buoyancy is provided which is operable both as a hydrofoil and submersible vessel. It is generally shaped in the form of a dolphin or porpoise, with the equivalent of fins acting as both navigation and attitude control ... | 08/24/1993 |
| 5232385 | Gas turbine powered ship A twin-hulled ship is powered by a gas turbine engine in each hull, the engine being located near the waterline in vertical alignment with a position outboard of the superstructure's internal sidewall, but preferably inboard of the superstructure's extern... | 08/03/1993 |
| 5144905 | Diving boat A diving boat wherein an air tank, water tank and navigating apparatus are provided, air within the air tank is fed into the watertight boat body and excess air produced thereby is discharged into water outside the boat body through an automatic balance t... | 09/08/1992 |
| 4922848 | Underwater rescue device An underwater rescue device which delivers fresh air into the interior of a submerged vessel by puncturing a hole through the body of the vessel and forcing fresh air through the new opening. The rescue device provides for the use of an elongated housing ... | 05/08/1990 |
| 4903628 | Pressure equalizer A pressure equalizing cabinet for instruments intended to be submerged in water is described. The device includes a source of compressed air and a piston in a cylinder. One side of the piston is in communication with the interior of the cabinet and the ot... | 02/27/1990 |
| 4889066 | Submersible vehicle A self-propelled submersible vehicle which comprises a hull and a cockpit defined within the hull, a transparent dome on the top of the hull formed with the cockpit and enclosure walls defining the cockpit within the hull. The cockpit is open ended at the... | 12/26/1989 |
| 4694768 | Emergency air system for partially submerged vessels A plurality of tanks situated in the vessel, each of the tanks housing a quantity of air under pressure for use in the system. Each tank connected in series would supply air via a line system to each living quarter in the vessel, perferable at two points ... | 09/22/1987 |
| 4662904 | Gill for extracting oxygen from oxygen bearing fluids An apparatus for extracting oxygen from sea water in which a plurality of hollow gill members carry on oxygen extracting heme and are positioned within a diffuser. A flow of oxygen bearing liquid, such as sea water, passes through the diffuser and around ... | 05/05/1987 |
| 4276851 | Underwater cruise device An underwater cruise device is disclosed which is mounted to a vessel by a vertical telescoping boom. The device includes a diving chair mounted to the vertical boom which can be selectively submerged during diving operations or completely withdrawn from ... | 07/07/1981 |
| 4060076 | Breathing apparatus incorporating depth compensation Breathing apparatus is provided for use under water which comprises a connection device such as a helmet, mask, or the like and a breathing circuit in communication with the connection device. The breathing circuit includes a carbon-dioxide absorber and a... | 11/29/1977 |
| 3957007 | Air powered water propulsion method and apparatus A vessel operable by a diver for use in towing himself has an air motor powered by the diver's air tank. All or part of the air used by the diver passes through the motor. Air used by the motor in excess of air needed for breathing is exhausted into the v... | 05/18/1976 |
