Inventor
FISCHER ROBERT T
13 patents
Patents
13 patentsUS6279487B1Aug 28, 2001
Railroad hopper car door assembly
MINER ENTERPRISES66 citations95
US6019049AFeb 1, 2000
Railroad hopper car door assembly
MINER ENTERPRISES79 citations95
US4601244AJul 22, 1986
Operating system for railroad hopper car gate assembly doors
MINER ENTERPRISES85 citations95
US6604469B1Aug 12, 2003
Apparatus for controlling operation of railroad hopper car discharge doors
MINER ENTERPRISES37 citations92
US5829359ANov 3, 1998
Railway hopper car discharge gate assembly
MINER ENTERPRISES30 citations92
US5163372ANov 17, 1992
Unit for actuating gates of a hopper railroad car
MINER ENTERPRISES42 citations92
USRE35925EOct 20, 1998
Apparatus for controlling operation of a railcar discharge gate assembly having a lost motion mechanism for unlocking the gate prior to movement
MINER ENTERPRISES22 citations91
US4542701ASep 24, 1985
Tamper-proof railroad hopper car door operating system
MINER ENTERPRISES33 citations89
US5086709AFeb 11, 1992
Sliding gate structure with dual linkage per single actuator arrangement
MINER ENTERPRISES21 citations81
US4256042AMar 17, 1981
Railway hopper car sliding gate lock
MINER ENTERPRISES28 citations81
US4253400AMar 3, 1981
Railway hopper car sliding gate closing mechanism
MINER ENTERPRISES23 citations75
US4454822AJun 19, 1984
Gate assembly unit for ballast distribution from railroad car
MINER ENTERPRISES14 citations73
US3956996AMay 18, 1976
Pivoted slide gate lock
MINER ENTERPRISES18 citations73