Prestressed concrete pressure vessels
Patent 4313902 Issued on February 2, 1982. Estimated Expiration Date: 
August 11, 2000. 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.
August 11, 2000. 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 3390211 3589088 Stressed hollow concrete cylinders Patent #: 4044088 InventorsAssigneeApplicationNo. 06/177180 filed on 08/11/1980US Classes:264/228, FORMING STRESSED CONCRETE ARTICLES376/296PrestressedExaminersPrimary: Pavelko, Thomas P.Attorney, Agent or FirmInternational ClassesE04H 7/00 (20060101)E04H 7/26 (20060101) G21C 13/093 (20060101) G21C 13/08 (20060101) AbstractA prestressed concrete pressure-containment vessel having one or more cavities within its external shell. The cavities, whether cylindrical or other shape, are totally contained by prestressing tendons, which apply forces to contain various pressures within the structure. By permitting and actually inducing controlled cracking of the vessel in the outer portions of the thick shell wall, one embodiment of a pressure-containment vessel relieves stresses and enhances resistance to very high internal pressures and to stresses due to high internal temperatures and steep temperature gradients.Field of SearchFORMING STRESSED CONCRETE ARTICLES | |
