Bolt tension indicating means
Patent 4303001 Issued on December 1, 1981. Estimated Expiration Date: 
July 9, 1999. 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.
July 9, 1999. 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 ReferencesInventorApplicationNo. 06/055988 filed on 07/09/1979US Classes:411/10, Deformable washer411/531WASHER STRUCTUREExaminersPrimary: Foss, J. FranklinAttorney, Agent or FirmInternational ClassesF16B 31/00 (20060101)F16B 31/02 (20060101) AbstractImproved flat annular washer for indicating tension on associated high tensile strength bolt. Washer bears against either bolt head or nut of given radius. Washer includes means for indicating stress on washer which visibly moves when stress on washer, which is related to tensile stress on bolt, reaches a preselected level. | |
