Patents Assigned to Ground Control, Inc.
  • Mine roof support plate bolt
    Patent number: 4940365
    Abstract: A mine roof support plate bolt formed from an elongated rod has a head and flange at one end, and a helical channel adjacent the other end, the rod having a threaded section adjacent the channeled section and an expansion anchor engaged on the threaded section. The channeled section of the rod has a length greater than the length of the expansion anchor such that a major portion of the channeled section is exposed regardless of the positioning of the expansion anchor on the threaded section.
    Type: Grant
    Filed: May 18, 1989
    Date of Patent: July 10, 1990
    Assignee: Ground Control, Inc.
    Inventor: Richard A. Rozanc