A noise control apparatus for a motorcycle exhaust system. The apparatus includes at least one exhaust pipe assembly having a direct pass-through mode and an indirect mode wherein exhaust gases are optionally directed through noise attenuating means. The apparatus includes at least one valve for co
A noise control apparatus for a motorcycle exhaust system. The apparatus includes at least one exhaust pipe assembly having a direct pass-through mode and an indirect mode wherein exhaust gases are optionally directed through noise attenuating means. The apparatus includes at least one valve for controlling exhaust gas flow, a motor, a switch controlling said motor, a wire carrier, a wire connected between the carrier and the valve(s), and a rotary threaded drive shaft driven by the motor for moving the positioner. The threaded drive shaft includes radially extending and circumferentially facing stop means on both sides of said wire carrier. The valve is positioned under the control of the switch.
대표청구항▼
What is claimed is: 1. A noise control apparatus for a motorcycle exhaust system, said apparatus including at least one exhaust pipe assembly having a direct pass-through mode and an indirect mode wherein exhaust gasses are directed through noise attenuating means, at least one valve for controllin
What is claimed is: 1. A noise control apparatus for a motorcycle exhaust system, said apparatus including at least one exhaust pipe assembly having a direct pass-through mode and an indirect mode wherein exhaust gasses are directed through noise attenuating means, at least one valve for controlling exhaust gas flow between said direct and said indirect modes, a motor, a switch controlling said motor, a wire carrier, a wire connected between said carrier and said valve, and a rotary threaded drive shaft driven by said motor for moving said wire carrier, radially extending and circumferentially facing first stop means on both sides of said wire carrier and cooperating radially extending and circumferentially facing second stop means for engaging said wire carrier in each direction of travel, whereby said valve may be positioned under the control of said switch. 2. A noise control apparatus as defined in claim 1 which includes two exhaust pipe assemblies, one valve in each exhaust pipe for controlling exhaust gas flow and a wire for each valve, said wire being connected between said carrier and said valves. 3. A noise control apparatus as defined in claim 1 wherein said stop means is located on two pairs of lock nuts and said wire carrier, said lock nuts being adjustably postionable. 4. A noise control apparatus as defined in claim 1 wherein said wire carrier runs in a pair of longitudinal guides, said wire carrier including cut out portions for engaging said guides. 5. A noise control apparatus as defined in claim 1 wherein said switch is remotely positioned relative to said motor and said carrier. 6. A noise control apparatus as defined in claim 1 wherein said switch controlling said motor includes a position for causing said carrier to move in one direction and another position to cause said carrier to move the opposite direction and a neutral position in which said cater maybe stopped at any time. 7. A noise control apparatus as defined in claim 1 wherein said motor comprises a DC motor. 8. A noise control apparatus as defined in claim 1 which includes a reversible DC motor and a set of planetary gears, said planetary gears driving said rotary threaded drive shaft. 9. A noise control apparatus as defined in claim 1 wherein said wire carrier includes a female threaded interior opening for receiving said rotary threaded drive shaft. 10. A noise control apparatus for a motorcycle exhaust system as defined in claim 1 wherein said at least one valve is movable between the open and closed positions, and any number of intermediate positions, said at least one valve being a butterfly valve movable in response to a wire having a stiff but flexible connection to an arm attached to the shaft of said butterfly valve. 11. A noise control apparatus as defined in claim 1 wherein said at least one exhaust pipe has a pass through mode on its inner pipe and has an outer shell with sound attenuating means in the annular space between said shells, said gases in said indirect mode being directed through said noise attenuating means. 12. A noise control apparatus as defined in claim 1 wherein said indirect mode comprises plural openings in said exhaust pipe that are constructed and arranged to direct said gas flow through a baffle-containing chamber when said valve is closed. 13. A noise control apparatus for a motorcycle exhaust system, said apparatus including two exhaust pipe assemblies each having a direct pass-through mode and each having a noise attenuating mode wherein exhaust gases are directed through a chamber having a plurality of baffles, at least two valves for controlling the flow of exhaust gases between said direct pass-through mode and said noise attenuating mode, a bi-directional electric motor, a three-position switch for controlling said motor, a wire carrier and at least one guide therefor, two wires connected between said wire carrier and two of said valves, a rotary threaded drive shaft driven by said motor for moving said carrier, first radially extending, circumferentially facing stop means associated with said drive shaft, and second radially extending, circumferentially facing stop means on both sides of said wire carrier, whereby said valves may be positioned between a direct pass-through mode, a noise attenuating mode and a number of intermediate positions, all under the control of said switch.
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Baker Gary A., Automatic compression brake muffler.
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