Patents Assigned to Abe W. Mathews Engineering Co.
  • Door operator apparatus
    Patent number: 4429491
    Abstract: The present invention relates to a mechanism for operating a panel (12) suitably mounted to a frame (12). An actuator (13) pivotally attached to frame (11) provides a linear pulling and pushing force. A pivot arm (15) constructed and arranged for interconnecting actuator (13) to panel (12) and pivotally attached to panel (12) and actuator (13). A motion arm (14) pivotally attached to frame (11) and pivotal arm (15) cooperates with pivot arm (15) to transfer the linear force of actuator (13) into a panel (12) opening and closing force.
    Type: Grant
    Filed: October 13, 1981
    Date of Patent: February 7, 1984
    Assignee: Abe W. Mathews Engineering Co.
    Inventor: James A. Bruns