Racket having different portions comprised of different materials
Patent 4725059 Issued on February 16, 1988. Estimated Expiration Date: 
January 12, 2007. 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.
January 12, 2007. 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 ReferencesRacket frame Games racket Patent #: 4340226 InventorsAssigneeApplicationNo. 07/002137 filed on 01/12/1987US Classes:473/536Plural fiber compositionsExaminersPrimary: Pinkham, Richard C.Assistant: Schneider, Matthew L. Attorney, Agent or FirmInternational ClassesA63B 49/02 (20060101)A63B 49/10 (20060101) Foreign Application Priority Data1986-01-13 FRAbstractA racket body formed of composite materials in which the shaft portion of the handle, two branches of a throat portion and a frame portion, which can be completed by a bridging portion, adjoin in end to end relationship and have cores and sheaths composed of different materials. The sheaths are comprised of fiber webs or braids impregnated with synthetic resin, the fibers differing along the length of the racket from at least one portion to another, while the orientations of the fibers with respect to the axes of the respective cores can differ from place to place as well. The end portions of thetwo branches of the throat are axially offset from one another so as to avoid the formation of a rupture zone. | |
