Patents Assigned to Star Expansion Industries Corporation
  • Patent number: 4020734
    Abstract: A tension indicator for use with fasteners such as a cooperating nut and bolt. The tension indicator comprises a pair of washers for placing on the shank of the bolt between the bolthead or nut and the workpiece that is to be secured by the fastener. Each washer includes a concave central portion having a hole therethrough for receiving the shank of the bolt with the concave surfaces of the washers facing in opposite directions in the assembled condition. Each washer further includes at least one finger extending outwardly from the central portion. Prior to the application of the load on the tension indicator by either the fastener or the workpiece, the outermost end faces of the coacting fingers will be at equal and opposite angles with respect to each other. After a predetermined load has been applied to the fastener, the outermost end faces of the coacting fingers will be aligned with each other to thereby visually indicate that the desired load has been achieved.
    Type: Grant
    Filed: November 26, 1975
    Date of Patent: May 3, 1977
    Assignee: Star Expansion Industries Corporation
    Inventor: Walter Bell