Railway rolling stock – Trucks – Supplemental wheel
Patent
1981-12-03
1985-02-05
Bertsch, Richard A.
Railway rolling stock
Trucks
Supplemental wheel
747105, 105 97, 188 58, B62D 6112, B61H 900, B61F 1300
Patent
active
044972571
ABSTRACT:
A multiple wheeled vehicle in which at least some of the wheels are upwardly retractable by rotation of arms carrying the wheels. Hydraulic cylinders control the rotational position of the arms, and movable rods are connected to the hydraulic cylinder means. Coil springs urge the rods toward a position where the hydraulic cylinders and arm means position the wheel in a relatively downward rotational position, so that the retractable wheels may be alternatingly retracted upwardly and lowered downwardly by the hydraulic cylinder means, while also possessing a spring suspension system. Additionally or alternatively, non-retractable rail wheels may be present, being driven by internal, planetary-type, differential axle means defining internal brake means spaced centrally inwardly from the rail wheels by a distance sufficient to avoid damage to the brakes upon derailment. Likewise, center pivot coupler means may be provided in which the coupler arm has roller members to roll along a plate, to facilitate the horizontal pivotal motion.
REFERENCES:
patent: 926279 (1909-06-01), Miller
patent: 3344893 (1967-10-01), Pelikan
patent: 3420191 (1969-01-01), White, Jr.
patent: 3701323 (1972-10-01), Cox
patent: 3832913 (1974-09-01), Helmer
patent: 3838610 (1974-10-01), Fogelberg
patent: 4085682 (1978-04-01), Nelson et al.
patent: 4167142 (1979-09-01), Ames
patent: 4213399 (1980-07-01), DeBrick
Bertsch Richard A.
Pigott, Jr. Charles F.
White Machinery Corporation
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