|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 27 인용 특허 : 10|
A railroad crosstie includes an outer casing made of a 50--50 mixture by volume of recycled high density polyethylene and crumb rubber from recycled tires. The outer casing includes an upper section and a lower section, which cooperate to define a cavity in which a beam or beams are installed. Each of the beams include an aperture below the rail supporting areas of the crosstie and an insert of the same composite material of which the outer casing is made is installed within the beams below the rail support areas. A flowable concrete mixture fills the ca...
[ What is claimed is:] [1.] Railroad crosstie having a pair of rail support areas spaced longitudinally along said crosstie for supporting rails comprising an outer casing defining a longitudinally extending cavity therein, said outer casing being made of a material sufficiently yieldable to permit fasteners for holding said rails on the support areas to be driven through the casing and into said cavity, a beam extending longitudinally within said cavity and extending beneath said rail support areas, said beam defining a chamber therewithin, inserts moun...