Patents Assigned to Browning & Bushman
  • Mining machine having rectangular thrust transmitting conveyor column
    Patent number: 4014574
    Abstract: A mining machine comprises a laterally elongated cutting head including means for cutting an earth formation, a laterally elongated thrust transmitting column connected to and extending rearwardly from the cutting head, and a power head connected to the rear of the column and operative to thrust the cutting head forward into the earth formation by means of the interposed column. The column carries a non-thrust transmitting column conveyor for carrying fragments cut from the formation from the cutting head to the power head.
    Type: Grant
    Filed: April 10, 1975
    Date of Patent: March 29, 1977
    Assignee: Browning & Bushman
    Inventor: Robert E. Todd