| US 7,455,242 B2 | ||
| Railway track system | ||
| Isaak Aleynik, Sioux City, Iowa (US) | ||
| Assigned to A&A Technologies, Sioux, Iowa (US) | ||
| Filed on Jul. 27, 2005, as Appl. No. 11/190,650. | ||
| Prior Publication US 2007/0023538 A1, Feb. 01, 2007 | ||
| Int. Cl. E01B 5/00 (2006.01); C21D 9/04 (2006.01); B61B 17/00 (2006.01) | ||
| U.S. Cl. 238—122 [148/581; 295/31.1] | 11 Claims |
| 1. A railway track system, comprising:
a longitudinally extending rail structure with a rail head, said rail head including a laterally disposed running surface;
a wheel structure having a bearing surface and a wheel tread with a rolling surface configured for rolling engagement with
the rail head running surface, said running surface and said rolling surface establishing a contact surface when the wheel
structure contacts the running surface of the rail, said contact surface having distinct dimensions selected to fit within
a range that is determined based on the relationship between width of the contact surface taken across longitudinal extension
of the rail structure and an effective length of the contact surface, said range being determined as:
2b/Lr=.45 to .55
where 2b is the width of the contact surface taken across longitudinal extension of the rail structure and Lr is the effective length
of the contact surface; and
said rolling surface has a distinct radial dimension and said contact surface has a distinct effective length determined according
to:
Lr=4RΦ
where Lr is the effective length of the contact surface, R is the radius of the convex contact portion of the wheel, and Φ
is the angle of vertical misalignment from the rail's vertical axis determined as an angle between tangent lines applied to
the wheel and rail at a point of contact.
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