Railways – Traction – Transverse live roll
Patent
1991-05-10
1992-10-27
Graham, Matthew C.
Railways
Traction
Transverse live roll
104184, B61B 1300
Patent
active
051580209
ABSTRACT:
As drive shoe assembly (50) for a transportation system in which transport units (31) are propelled along a path by frictional engagement of the drive shoe assembly (50) by a drive assembly (36). The drive shoe assembly (50) includes frame members (54) and a plurality of resiliently flexible traction members (52) disposed therebetween defining a resiliently flexible traction surface (60). The traction surface (60) is coupled to the frame members (54) and, further, is positioned to be frictionally engaged by a plurality of drive wheels (36) in a sequence situated along the path to propel the transport unit (31) forward. Upon engagement between the drive wheels (36) and the traction surface (60), the resilient traction surface (60) is sufficiently deflected such that any ice accumulation on the resilient members (52) will crack and fall away. The resilient traction surface (60) allows the use of solid tires (36), affords damping against lateral swinging of the units (31), and accommodates acceleration and deceleration without tire-shoe slipping. A method of avoiding detrimental ice build up on drive shoes, as well as lateral swing damping, acceleration accommodation, and tire wear reduction.
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Graham Matthew C.
Kunczynski Alexander Jan
Kunczynski Zygmunt Alexander
Le Mark T.
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