Inventor
STEFFEN JOHN J
US10 patents
Patents
10 patentsUS6681943B2Jan 27, 2004
Railcar draft gear assembly and system
AMSTED IND INC52 citations94
US6446820B1Sep 10, 2002
Railcar draft gear assembly and system
AMSTED IND INC76 citations94
US5312007AMay 17, 1994
Slackless railway coupler with draft/buff gear
AMSTED IND INC72 citations94
US6360906B1Mar 26, 2002
Slackless railway coupler with buff/draft gear
AMSTED IND INC32 citations92
US5809899ASep 22, 1998
Draft sill and wheel truck connection
AMSTED IND INC18 citations81
US6167813B1Jan 2, 2001
Tapered wear liner and articulated connector with tapered wear liner
AMSTED IND INC13 citations73
US5809898ASep 22, 1998
Ring seat removal system for a railcar articulate connector
AMSTED IND INC15 citations73
US5193699AMar 16, 1993
Center sill with short yoke member for converting from coupler to drawbar arrangement without modifying center sill
AMSTED IND INC10 citations73
US5080242AJan 14, 1992
Slackless railcar connections with upward wear indicator
AMSTED IND INC8 citations73
US5850929ADec 22, 1998
Ring seat removal system for a railcar articulated connector
AMSTED IND INC2 citations62