Patents Assigned to Rastech, Inc.
  • Hot bearing warning bolt
    Patent number: 4818119
    Abstract: A temperature warning device for monitoring the temperature of an article and for providing a dependable signal that a preselected temperature has been reached. The device includes an axially extending bore into which a heat responsive element, a driver, and a sensing indicator are arranged. The bore is normally sealed by a closure plug to prevent failure due to contaminants. Upon reaching a preselected temperature the element exerts force against the driver which in turn forcibly removes the closure plug, exposing the indicator.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: April 4, 1989
    Assignee: Rastech, Inc.
    Inventors: Theodore Busch, Clark E. Johnson, Jr.