Patents Assigned to Bernard E. Hatch
  • Rolling steel door
    Patent number: 4738296
    Abstract: An improved rolling steel door of the type having interlocking steel slats, each slat being hinged to the slat above and below it. An improved method of holding the slats in vertical alignment with one another utilizes a pin affixed to the lower end of each slat. The pin has an enlarged head which abuts the edge of the adjacent slat. A spring module is readily removable from the rolling steel door assembly to facilitate the replacement of a broken or inoperative spring.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: April 19, 1988
    Assignees: Bernard E. Hatch, Marcilyn J. Hatch
    Inventor: Bernard Hatch