Railways – Tubular way – Internal service device
Patent
1975-04-14
1976-12-28
Spar, Robert J.
Railways
Tubular way
Internal service device
104155, 243 2, B61B 1310
Patent
active
039994872
ABSTRACT:
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 a differential air pressure between the front and rear of the vehicular train, the differential air pressure being achieved by propelling or forcing air into the duct section increasing air pressure behind the vehicle while simultaneously evacuating air from the duct section in front of the vehicle. A plurality of air pumping stations are disposed at intervals along the main transport duct, with each station extracting air from a portion of the duct on one side of the pumping device while forcing the air into the portion of the duct on the opposite side of the pumping device. At each station, a system of air pumps and duct valves permit the build-up and reduction of air pressures within adjacent duct sections necessary for propelling the vehicle at a designed speed, with the valve openings being related to the position of the vehicle along the duct itself.
REFERENCES:
patent: 3148845 (1964-09-01), Buchwald et al.
patent: 3265324 (1966-08-01), Mach et al.
patent: 3384031 (1968-05-01), Dashew et al.
patent: 3404638 (1968-10-01), Edwards
patent: 3656436 (1972-04-01), Edwards
patent: 3853355 (1974-12-01), Buisson
Reese Randolph A.
Spar Robert J.
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