Hopper discharge valve
 A hopper discharge valve for railway hopper cars used in transporting granular lading with the valve including a fully rotatable valve shaft having a plurality of discharging channels formed in its periphery throughout its length, with the channels being arranged so as to provide simultaneous discharge from both ends of the hopper car or from selected ends thereof. 
Edsco, Inc.
B B B
B65D B65G B65D
inventional inventional inventional
Harry G.
Robertson