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US Patent 4923203 - Composite bicycle frame with crossed tubular portions
US Patent Issued on May 8, 1990
Estimated Patent Expiration Date:
December 23, 2007Estimated 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.
Estimated Patent Expiration Date:
December 23, 2007Estimated 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.AbstractA generally hollow bicycle frame of resin impregnated fibrous material having a main tubular portion and a cross tubular portion arranged in an X-shaped geometry as viewed from one side. A rear segment of the main portion may be slit to provide opposing rear stays for receiving a rear wheel assembly therebetween. The main tubular portion connects the head tube and the rear wheel supports and the cross tubular portion connects the bottom bracket and the seat sleeve. Both of these portions may be substantially straight and continuous from end to end and joined by a generally hollow common junction. Alternatively, the common junction may integrally unite a plurality of pre-formed tubular portions corresponding respectively to the supports for the front wheel assembly, the rear wheel assembly, the bottom bracket and the seat. The tubular portions may have round or non-circular aerodynamic cross-sectional shapes. | InventorsApplicationNo. 137124 filed on 12/23/1987US Classes:280/288.3, Hollow shell frames280/281.1Frames and running gearField of Search280/282, Polycycles280/270, One-wheel controlled280/273, Plural occupant280/274Frames and running gearExaminersPrimary: Marmor, Charles A.Assistant: McGiehan, Donn Attorney, Agent or FirmUS Patent References2182828, 2370726, 2729466, 2827306, 3233916, 3375024, 3493240, 3641230, 3833242, 3884521, 4015854, Frame for various cyclesIssued on: 04/05/1977 Inventor: Ramond4230332, Bicycle frame Issued on: 10/28/1980 Inventor: Porsche4264389, Method of manufacturing a tennis racket Issued on: 04/28/1981 Inventor: Staub , et al.4368897, Bicycle frame structure Issued on: 01/18/1983 Inventor: Brown4411333, Motor cycle fairing Issued on: 10/25/1983 Inventor: Bothwell4471020, Foam-containing structures Issued on: 09/11/1984 Inventor: McCarthy4479662, Method and means for assembling the parts of cycle frames and the like Issued on: 10/30/1984 Inventor: Defour , et al.4493749, Composite vehicle frames and method of manufacturing composite vehicle frames Issued on: 01/15/1985 Inventor: Brezina4511523, Fabrication of a composite material racket frame Issued on: 04/16/1985 Inventor: Hsu4513986, Bicycle frame Issued on: 04/30/1985 Inventor: Trimble4529216, Two-wheeled vehicle Issued on: 07/16/1985 Inventor: Spekner4565595, Method of making composite aircraft wing Issued on: 01/21/1986 Inventor: Whitener4613146, Monocoque bicycle frame Issued on: 09/23/1986 Inventor: Sharp , et al.4657795Tubular material based on a fabric-reinforced resin, and a bicycle or similar vehicle frame constructed with such a material Issued on: 04/14/1987 Inventor: Foret Foreign Patent References
International ClassB62K 003/14 |
