초록 ▼

A railroad tie 10 is described. The tie includes elongated side surfaces 23 with a plurality of ballast locking indentations 34 formed therein. The indentations converge from open upward ends 35 to reduced bottom ends 36. The configuration of the locking indentations at the bottom ends is such that

A railroad tie 10 is described. The tie includes elongated side surfaces 23 with a plurality of ballast locking indentations 34 formed therein. The indentations converge from open upward ends 35 to reduced bottom ends 36. The configuration of the locking indentations at the bottom ends is such that the indentations will receive the maximum aggregate size within the ballast. The tie body, provided with the indentations, and relationship of the sides 23 to the indentations 34 is such that maximum resistance is offered by the tie to longitudinal movement of the tie in the ballast with respect to the tie length dimension.

대표청구항 ▼

A concrete railroad tie for placement in ballast wiht aggregate having a maximum dimension, comprising: an elongated tie body defining a longitudinal axis along its major length, said tie body including a longitudinal top surface for placement of a railway rail thereon, a bottom surface, and two opp

A concrete railroad tie for placement in ballast wiht aggregate having a maximum dimension, comprising: an elongated tie body defining a longitudinal axis along its major length, said tie body including a longitudinal top surface for placement of a railway rail thereon, a bottom surface, and two opposed outside surfaces extending between opposed transverse ends; said tie body including a plurality of ballast locking indentations formed therein along the two opposed outside surfaces, each indentation extending between the top surface and the bottom surface, each indentation converging downwardly from an enlarged top end having an enlarged width dimension measured along the longitudinal axis to a reduced bottom end having a reduced width dimension measured along the longitudinal axis, said reduced bottom end extending to and opening at the bottom surface of the tie body, said enlarged top end extending to and opening at the top surface of the tie body, said reduced width being substantially equal to the maximum size dimension aggregate.