High-speed ground transportation system
Patent 4023500 Issued on May 17, 1977. Estimated Expiration Date: 
May 17, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 17, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1183198 3090328 3404638 3442223 3508497 3797405 3905302 Pneumatic load transportation system Rapid transit system Patent #: 3954064 InventorApplicationNo. 05/625139 filed on 10/23/1975US Classes:104/138.1, TUBULAR WAY104/155, Pneumatic104/23.2, Car supported by fluid current pushing against surface104/281, MAGNETICALLY SUSPENDED CAR104/48, TRANSFER TABLES105/365, Tubular way406/185WheeledExaminersPrimary: Spar, Robert J.Assistant: Reese, Randolph A. Attorney, Agent or FirmAbstractA 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 and the area beneath the vehicle while preventing fluid communication between that high pressure area and an evacuated area located in front of the vehicle, to create an air film beneath the vehicle upon which it rides. Cargo handling means are located near the tunnel and shunting means enable the vehicle to be shunted into those cargo handling areas when desired. Booster stations located at selected points serve to increase a pressure differential across a vehicle to assist that vehicle when necessary, and magnetic means are used to maintain the vehicle in a upright orientation as it is propelled through a tunnel.Field of SearchPneumatic | |
