Patents by Inventor Roland R. LaPointe

Roland R. LaPointe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Drill
    Patent number: 4351399
    Abstract: An earth drilling apparatus including centralizer means for stabilizing a drive rod during drilling operations.
    Type: Grant
    Filed: July 3, 1980
    Date of Patent: September 28, 1982
    Assignee: Joy Manufacturing Company
    Inventor: Roland R. Lapointe
  • Pneumatic and hydraulic power control of drill
    Patent number: 4334408
    Abstract: An apparatus and method of controlling the input power to a drill feed or other hydraulic system in which the hydraulic power source is obtained from a compressed air supply. Wherein, the flow of air is varied in response to a hydraulic signal controlled by the load demand of the hydraulic system. Low and high mode controls are provided to operate hydraulically actuated mechanisms; and a hydraulic absorbing load is imposed to prevent stall or overspeed of the pump and motor during low load conditions.
    Type: Grant
    Filed: September 19, 1979
    Date of Patent: June 15, 1982
    Assignee: Joy Manufacturing Company
    Inventor: Roland R. LaPointe