A light weight fatigue resistant cast steel bolster for a freight railcar truck without any opening in the bolster bottom wall having internal risers connected to the bottom wall at bend points and with a ratio of metal in the top and bottom walls that lessens the distance of the neutral axis above the bolster bottom wall as compared to comparable prior art bolsters.
申请公布号
US5111753(A)
申请公布日期
1992.05.12
申请号
US19900631905
申请日期
1990.12.21
申请人
AMSTED INDUSTRIES INCORPORATED
发明人
ZIGLER, HERBERT L.;WRONKIEWICZ, ROBERT D.;MCKEOWN, JR., FRANKLIN;WACHTER, WILLIAM A.