Gimbal joint for piping systems
Patent 4643463 Issued on February 17, 1987. Estimated Expiration Date: 
February 6, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 6, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 656667 2613087 2904356 3112129 3219365 Flexible ball joint Flexible piping joint and method of forming same Gimbal conduit joint Patent #: 4480857 InventorsAssigneeApplicationNo. 06/698693 filed on 02/06/1985US Classes:285/226, Bellows285/265With gimbal ringExaminersPrimary: Callaghan, Thomas F.Attorney, Agent or FirmInternational ClassF16L 27/02 (20060101)AbstractA flexible gimbal joint for pipes including an internal flexible seal interconnecting the pipes and an external gimbal ring which also provides secondary sealing. The joint includes spherical portions with mating sinusoidal free edges, the external ring and four trunnion pins, each pin coupled to the ring, two pins pivotally coupled to the first spherical portion and two other pins pivotally coupled to the second spherical portion. The inner surface of the ring is formed substantially as a spherical portion and has a diameter slightly greater than the outer surfaces of the first and second spherical portions. The ring surrounds these spherical portions, covering the gap between them, and thus acts as a secondary seal, while protecting the main internal seal. All axial loads on the joint are assumed by the spherical portions, the external ring and the trunnion pins, so the joint is easily flexed. | |
