Patents by Inventor Donald R. Heye

Donald R. Heye has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • In-line pressure balanced universal expansion joint
    Patent number: 5299840
    Abstract: An in-line, pressure balanced universal expansion joint for a piping system has a central bellows and opposite first and second end bellows secured to the opposite first and second ends of the central bellows. A first gimbal assembly pivotally links the outer end of the first end bellows to the second end of the central bellows. A second gimbal assembly links the outer end of the second end bellows to the first end of the central bellows. Each gimbal assembly has a gimbal ring pivotally linked to the outer end of the respective end bellows via a first linkage and to the respective end of the central bellows via a second linkage for pivotal movement about two perpendicular pivot axes.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: April 5, 1994
    Assignee: Hyspan Precision Products, Inc.
    Inventor: Donald R. Heye