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US 2003/0164403 A1Published application
Elastomeric railroad crosstie
OwnerJohn H. Fitch, Richard D. Knittelinventors
Life of this patent
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Abstract
A plurality of elongated, substantially planar, elastomeric members are assembled together in a stack such that the members are generally aligned with each other. The members are made of a stack of tire treads. A means of binding is provided for holding the stack of members together and maintaining their alignment. The addition of one or more rigid longitudinal element(s) provides stiffness.
Claims1
A railroad crosstie comprising:
- a. a plurality of elongated, substantially planar, elastomeric members assembled together in a stack such that the members are generally aligned with each other;
- b. a means of binding the elastomeric members together and keeping them aligned with each other;
- c. one or more stiffening elements placed longitudinally within, or along the outside of, the stack of elastomeric members, composed of a substantially rigid material, sufficiently rigid to prevent excessive flexion and deformation of the crosstie.
Dependencies are inferred from the claim text.