Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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US Patent 6804955 - Dual motorcycle exhaust system
Estimated Patent Expiration Date:
September 25, 2022Estimated 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.AbstractAn exhaust system for an internal combustion engine having a first cylinder and a second cylinder from which pulses of exhaust gas exit and are routed along separate paths towards the exhaust mufflers. The exhaust system independently routes the pulses of exhaust gas from the two cylinders. The exhaust gases that are expelled from the first cylinder are routed through a first exhaust pipe. The exhaust gases that are expelled from the second cylinder are routed through a second exhaust pipe assembly. The second exhaust pipe assembly routes the exhaust gasses from an exhaust port for the second cylinder laterally across the motorcycle to achieve a true dual exhaust system. The second exhaust pipe assembly provides an approximate equal length flow path as compared to the path used by the exhaust gasses that are expelled from the first cylinder. | InventorApplicationNo. 10255131 filed on 09/25/2002US Classes:60/313, Correlated exhausts from plural cylinders60/312, Pulsed, timed, tuned or resonating exhaust60/322, Having vibration attenuating, or expansion and contraction relieving structure180/89.2, With means for handling exhaust of a motor180/296, Including means on body frame or motor for handling exhaust60/323, Common receiver having inlets from plural cylinder (i.e., exhaust manifold)60/293, Check valve feeds air to exhaust system181/227, Pipe-muffler (e.g., tail pipe type)60/284, Automatic or timed reactor purge or heat-up in engine starting operation60/272, INTERNAL COMBUSTION ENGINE WITH TREATMENT OR HANDLING OF EXHAUST GAS180/219, Arranged in tandem180/309With means for handling motor exhaustField of Search60/312, Pulsed, timed, tuned or resonating exhaust60/313, Correlated exhausts from plural cylinders60/314, Two-cycle engine60/322, Having vibration attenuating, or expansion and contraction relieving structure60/323, Common receiver having inlets from plural cylinder (i.e., exhaust manifold)180/89.2, With means for handling exhaust of a motor180/225, Having frame element or fender constituting also exhaust or fuel passageway or fuel reservoir180/296, Including means on body frame or motor for handling exhaust180/309With means for handling motor exhaustExaminersPrimary: Tran, Binh X.Attorney, Agent or FirmUS Patent References3545414, 4154058, Exhaust cleaning device for a multi-cylinder internal combustion engineIssued on: 05/15/1979 Inventor: Mase , et al.4356885, Chambered-core motorcycle-exhaust apparatus Issued on: 11/02/1982 Inventor: Dello4359865, Exhaust system for multicylinder motorbike engine Issued on: 11/23/1982 Inventor: Nakao , et al.5937640, Thermal management system for catalytic converters Issued on: 08/17/1999 Inventor: Krzykowski, et al.6141958, Exhaust cooling system for vehicles Issued on: 11/07/2000 Inventor: Voss6193004, Motorcycle exhaust system Issued on: 02/27/2001 Inventor: Cooksey, et al.6334501Exhaust system for a motorcycle Issued on: 01/01/2002 Inventor: Kawamoto International ClassF02B 2702 |
