Patents Assigned to Mining Developments Limited
  • Underground rock chutes
    Patent number: 4371289
    Abstract: A rock pass bored in rock is lined with cylinders 10 which are stacked one on top of the other. The liners are lined in those parts which are subject to wear with detachable liners 15. The remainder carries rails 14 as a protection against rebound.
    Type: Grant
    Filed: June 6, 1980
    Date of Patent: February 1, 1983
    Assignee: Gold Fields Mining and Development Limited
    Inventor: David F. Odendaal
  • Earth working machine having independent tools and roof engaging bridge
    Patent number: 4098538
    Abstract: A mobile earth working machine has a tracked base on which various tools such as an impactor hammer and a side delivery bucket are mounted on separate booms.To permit two or more tools to be used simultaneously, while tunnelling, a locking or clamping arrangement is provided on the machine which is operational when the machine is stationary and braked to clamp to machine between floor and roof. The locking arrangement is a bridge structure preferably mounting three ram-movable clamp plates.
    Type: Grant
    Filed: April 13, 1977
    Date of Patent: July 4, 1978
    Assignee: Mining Developments Limited
    Inventor: Allan Richard Hilton