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| Number | Title | Issue Date |
| 4023500 | High-speed ground transportation system A high-speed ground transportation system wherein a vehicle rides on a film of air and is propelled as a free piston through a tunnel by pneumatic pressure. Seals on the vehicle create fluid communication between a high pressure area behind the vehicle an... | 05/17/1977 |
| 4017039 | Vehicle transport pipeline pumping system Booster pump devices for maintaining air flow through a conduit system for sweeping vehicles along the path defined by the conduit operate in full flow fashion such as tends to create reverse flow of air in the conduit within those sections between the in... | 04/12/1977 |
| 4015540 | Electromagnetic transportation system An electromagnetic transportation system for a vehicle which is adapted to travel along the inside of a tube. The system includes a series of electrical coils about the periphery of the tube which are connected to a three-phase alternating current supply.... | 04/05/1977 |
| 4007693 | Trackless train system A train system particularly adapted to be used in tunneling operation to outwardly move the loosened earth and rock or muck and, for that purpose, which is trackless and takes its lateral guidance from the usual utility duct which is required along the tu... | 02/15/1977 |
| 4000701 | Manned welding and inspection vehicle A manned welding and inspection vehicle for working within the interior of a pipeline or the like, the vehicle including two annular seals for aligning the vehicle in the pipeline and for sealing portions of the environment about the vehicle. The vehicle ... | 01/04/1977 |
| 3999487 | Pneumatic transportation system An pneumatically actuated transportation system for use in moving cargo or passengers on a load carrying vehicle or coupled train of vehicles which are disposed along a fluid sealed duct. Load carrying vehicles are motivated within sealed duct sections by... | 12/28/1976 |
| 3996858 | Linear solenoid motors An electrically operated linear solenoid motor designed to propel a passenger carrying vehicle through a guideway section. Innovations embodied in this disclosure make possible continuous propulsion of vehicles operating individually within an elongated g... | 12/14/1976 |
| 3980024 | Air propelled vehicle transportation system A low pressure transportation system for moving a vehicle between stations which are at atmospheric pressure without the use of valves in the vehicle conduit and without any substantial movement of system air in or out of the vehicle portals. The system c... | 09/14/1976 |
| 3954064 | Rapid transit system A rapid transit system in which a vehicle, typically comprising a train of detachably coupled cars, is suspended in an underground vacuum tunnel by permanent magnetic rails of high coercivity and propelled by gravity. For closely spaced stations, such as ... | 05/04/1976 |
| 3952667 | Pneumatic load transportation system A system comprising receiving and dispatching stations interconnected by a pipeline having a guide fixed to the inner side wall thereof, and by containers moving along this pipeline, each container having a leading seal mounted at the forward end side the... | 04/27/1976 |
