Method making a composite bicycle frame using composite lugs
April 29, 2014. 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 223241 2995781 Bicycle frame Method of molding composite bicycle frames Composite bicycle frames and methods of making same Bicycle frame Structure of golf club shaft and method of producing the shaft Large-tip composite golf shaft Composite frame wheelchair Dual and single seat composite bicycle frames and fabrication methods therefore InventorsApplicationNo. 192255 filed on 02/07/1994US Classes:156/245, In configured mold156/293, Inserting of lamina in hole, aperture or recess of other lamina and adherence to side walls thereof264/258, Joining a plurality of superposed fibrous or textile layers264/314Utilizing fluid-expansible moldExaminersPrimary: Ball, Michael W.Assistant: Crispino, Richard Attorney, Agent or FirmForeign Patent References
International ClassB32B 031/04AbstractThe bicycle frame of the invention is formed by selecting and adhesively joining previously formed and precured composite tubes to previously formed and precured composite lugs. The precured lugs are shaped from preforms comprising a plurality of resin impregnated fiber reinforced layers formed into a stacks having the fibers of adjacent layers cross one another, with preforms of each lug component being a set of shaped overlapping segments of the lug to be formed. The overlapping segments are then brought together and placed around an inflatable bladder to form an assemblage that is placed in a female mold, preferably of two halves, that are closed for forming the lug. The resulting assemblage is cured, with the bladder pressurized for urging the respective preforms to the mold shaping surfaces, providing a high laminate compaction during cure for a uniform, thin walled, strong, tubular, lug. The lugs are preferably formed with one or more plugs for closely fitting into adjacent open ends of the tubes. The composite tubes may be formed by a method similar to the lug forming method described, or by wrapping a preform up of a number of reinforced fiber layers, around a mandrel, and subjecting the preforms to an inward compaction pressure during cure. These methods provide a thin walled high strength tube.Other References
Field of SearchWith fluid pressure to prevent collapse of hollow structure during assembly and/or joiningWith lamina formation by molding or casting In configured mold Inserting of lamina in hole, aperture or recess of other lamina and adherence to side walls thereof Core within tube MOLDED JOINT Socket or open cup for bonding material Occupant propelled type Occupant within wheel Epicyclic or squirrel cage type Dicycles Frames and running gear Hollow shell frames Frames and running gear Yielding Front forks and heads Utilizing a flexible, deformable, or destructable molding surface or material Utilizing fluid-expansible mold Joining a plurality of superposed fibrous or textile layers | |
