Patents Examined by Michael A. Goodrin
  • Slide bar mining bolting machine
    Patent number: 4640369
    Abstract: A mine bolter machine has a main body supported by wheels and a main drill system structure forward of the main body. The main drill support is transversely movable relative to the main body and supports a first and second drilling mechanism. The first drilling mechanism is movable to the left of the main support structure and the second drilling mechanism is movable to the right of the main support structure.
    Type: Grant
    Filed: November 7, 1984
    Date of Patent: February 3, 1987
    Assignee: Ingersoll-Rand Company
    Inventor: Wynand M. Goyarts