Fiber reinforced resin leaf spring
Patent 4556204 Issued on December 3, 1985. Estimated Expiration Date: 
August 24, 2004. 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 24, 2004. 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 1546584 3056706 3142598 3367033 Composite material springs and manufacture Connecting element for introducing forces into a structural part Method of manufacture of an energy absorbing beam Patent #: 4414049 InventorAssigneeApplicationNo. 06/643708 filed on 08/24/1984US Classes:267/148, FIBROUS267/47StructureExaminersPrimary: Reger, Duane A.Attorney, Agent or FirmInternational ClassesF16F 1/368 (20060101)F16F 1/36 (20060101) AbstractA fiber reinforced resin leaf spring including a curved central section and a pair of generally circular end sections connected to the respective ends of the central section. Each end section defines an opening to receive a connecting member. The spring is wound from an endless strand of substantially continuous fibers impregnated with a cured thermosetting resin. A plurality of longitudinally extending ribs are formed in the neck region of the spring, which joins the curved central section to the respective end sections. The ribs, which extend alternately upwardly and downwardly from a plane extending through the neutral axis of the spring, increase the stiffness of the spring in the neck region and prevent delamination of the fibrous windings during service. | |
