Sound adjustable device for coupling to an engine and method for manufacturing thereof

Abstract

A sound adjustable device that varies exhaust-noise having a casing including a sound-dampening material that dampens exhaust-noise, an outer slotted pipe inside the casing, an inner slotted pipe inside the outer slotted pipe, and wherein at least one of the outer and inner slotted pipes is movable with respect to the other to alternately align the slots of the respective slotted pipes for a quieter exhaust-noise and to misalign the slots of the respective slotted pipes for a louder exhaust-noise. The sound adjustable device may also include a heat-shielding material inserted between the casing and the sound-dampening material to shield the casing from heat emitted by the exhaust, and a heat-resistant material may be included in the inner and outer slotted pipes.

1 . A sound adjustable device comprising: 
 a casing including a sound-dampening material that dampens exhaust-noise;    an outer slotted pipe positioned at least partially inside the casing, with the outer slotted pipe including at least one first slot;    an inner slotted pipe positioned at least partially inside the outer slotted pipe with the inner slotted pipe including at least one second slot; wherein    at least one of the inner and outer slotted pipes is movable with respect to the other to either alternately align the first and second slots for a quieter exhaust-noise or to misalign the first and second slots for a louder exhaust-noise.    
   
   
       2 . The sound adjustable device of  claim 1  further including a heat-shielding material between the sound-dampening material and the casing, the heat-shielding material thereby shielding the casing from heat emitted by the exhaust.  
   
   
       3 . The sound adjustable device of  claim 1  further including an endcap attached to the casing, the endcap securing at least one of the inner and outer slotted pipes in a fixed position.  
   
   
       4 . The sound adjustable device of  claim 3  wherein the endcap is a ring-shaped cover having an aperture formed therethrough, the endcap having an exterior rim with an exterior protruding fold, an interior rim with an interior protruding fold, and a plurality of tabs protruding from an interior surface of the endcap.  
   
   
       5 . The sound adjustable device of  claim 1  further including a collar attached to at least one of the inner and outer slotted pipes, the collar connecting the casing and an exhaust pipe.  
   
   
       6 . The sound adjustable device of  claim 5  wherein the collar further comprises: 
 a collar sleeve having a channel formed in the interior surface of the collar sleeve, the channel bordering a slot formed though the collar sleeve;    a sleeve plate, movable within the channel in the interior surface of the collar sleeve, wherein the interior surface of the sleeve plate is flush with the interior surface of the collar sleeve; and    a peg passing through the slot of the collar sleeve, the peg secured to the sleeve plate and at least one of the inner and outer slotted pipes wherein the peg moves the sleeve plate along the channel in the interior surface of the collar sleeve and the peg moves at least one of the inner and outer slotted pipes with respect to the other of the inner and outer slotted pipes.    
   
   
       7 . The sound adjustable device of  claim 6  wherein a first motor, in communication with a switch and attached to the collar, moves the peg.  
   
   
       8 . The sound adjustable device of  claim 7  wherein a second motor, in communication with the switch and is attached to an air flow device, moves the air flow device to regulate the air flow to a carburetor on an engine.  
   
   
       9 . A sound adjustment method comprising: 
 positioning a sound-dampening material at least partially within a casing to dampen exhaust-noise;    positioning an outer slotted pipe at least partially within the casing, the outer slotted pipe having at least one first slot;    positioning an inner slotted pipe at least partially within the outer slotted pipe, the inner slotted pipe having at least one second slot; and    moving at least one of the inner and outer slotted pipes with respect to the other to alternately align the first and second slots for a quieter exhaust-noise and to misalign the first and second slots for a louder exhaust-noise.    
   
   
       10 . The sound adjustment method of  claim 9  attaching a peg to at least one of the inner and outer slotted pipes to move at least one of the inner and outer slotted pipes with respect to the other.  
   
   
       11 . The sound adjustment method of  claim 9  positioning-a heat-shielding material between the casing and the sound-dampening material to shield the casing from heat emitted from exhaust-noise.  
   
   
       12 . The sound adjustment method of  claim 9  attaching an endcap to the egress end of the casing to secure at least one of the inner and outer slotted pipes in a fixed position.  
   
   
       13 . The sound adjustment method of  claim 12  forming the endcap into a ring-shaped cover with an aperture therethrough, the endcap having an exterior rim with an exterior protruding fold, an interior rim with an interior protruding fold, and a plurality of tabs protruding from an interior surface of the endcap.  
   
   
       14 . The sound adjustment method of  claim 9  attaching a collar to at least one of the inner and outer slotted pipes to connect the casing to an exhaust pipe, and to move at least one of the inner and outer slotted pipes with respect to the other.  
   
   
       15 . The sound adjustment method of  claim 14  comprising: 
 attaching the collar between the exhaust pipe and the casing, the collar including a collar sleeve;    forming a channel in the interior surface of the collar sleeve;    forming a slot though the collar sleeve, the slot bordered by the channel;    moving a sleeve plate within the channel in the interior surface of the collar sleeve, wherein the interior surface of the sleeve plate is flush with the interior surface of the collar sleeve; and    attaching a peg to the sleeve plate and at least one of the inner and outer slotted pipes, the peg passing through the slot formed in the collar sleeve to move the sleeve plate along the channel in the interior surface of the collar sleeve and to move at least one of the inner an outer slotted pipes with respect to the other.    
   
   
       16 . The sound adjustment method of  claim 15  attaching a first motor, in communication with a switch, to the collar to move at least one of the inner and outer slotted pipes with respect to the other.  
   
   
       17 . The sound adjustment method of  claim 15  further attaching a second motor, in communication with the switch, to an air flow device on a carburetor to adjust the air flow of the carburetor.