|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||238/106 ; 238/91|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 8 인용 특허 : 0|
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...
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 surfac...