Ladder-type sleepers and railway tracks

Details Ladder-type sleepers and railway tracks Ladder-type sleepers and railway tracks

1996-03-01

1996-12-10

Le, Mark T.

Railways: surface track

Stringers

Concrete

E01B 300

Patent

active

055823467

ABSTRACT:
The present invention comprises longitudinal beams provided on the underside of each of a pair of rails in the longitudinal direction of the rails and multiple connectors which mutually connect these longitudinal beams at designated spacings along the longitudinal direction. Because the ladder-type sleepers of the present invention have a structure wherein longitudinal beams are continuously positioned along the longitudinal direction of the rails, the bending stiffness of the track frame in the longitudinal direction increases, and the ballast pressure is reduced by improving the distribution of the train load. As a result, it is possible to reduce track irregularities resulting from the repeated burden of the train load.

REFERENCES:
patent: 681567 (1901-08-01), McDermott
patent: 755810 (1904-03-01), Swigart
patent: 879592 (1908-09-01), Cooper
patent: 904418 (1908-11-01), Franklin
patent: 1682665 (1928-08-01), Day
patent: 1682666 (1928-08-01), Day
patent: 2620137 (1952-12-01), Gilmer
patent: 3300140 (1967-01-01), Moses et al.
European Search Report on EP 95 40 0641 dated Jun. 27, 1995.

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