Patents Assigned to Boyd Motors Limited
  • Rock crusher
    Patent number: 5630555
    Abstract: This invention relates to improvements and modifications to a rock crusher. The rock crusher has at least two jaws the jaws being driven at different ends to each other. The non-driven end of at least one jaw is sufficiently free to allow vertical movement of that jaw with respect to the other jaw. This vertical movement imparts a grinding action in addition to the crushing action of the rock crusher. This removes the problems which can occur with wadding and can produce a very fine ground rock.
    Type: Grant
    Filed: August 1, 1995
    Date of Patent: May 20, 1997
    Assignee: Boyd Motors Limited
    Inventor: Phillip G. Boyd