Vibration damper for an electric trolling motor

Abstract

The invention is an accessory vibration damper that is applied over the diameter of any submersible electric motor housing of any modern electric trolling motor. Vibration damper is molded as a single unitary piece of an elastomeric compound that can have plural appendages placed perpependicular to the rotating armature of motor. Said appendages counteract the frequency range of vibrations produced while electric trolling motor is under propulsion.

1 .) A device ( 01 ) used to dampen vibrations and sound generated by the propulsion of an electric trolling motor assembly ( 20 ) comprising of:
 a flexible thermoplastic elastomer compound;   molded as a single unit;   a cylindrical hub ( 02 ) with an inner diameter opening through center axis;   two or more appendages ( 03 ) extending out from cylindrical hub ( 02 ).   
   
   
       2 .) The device ( 01 ) from  claim 1  in which flexible thermoplastic elastomer compound is in the hardness range of 30 Shore OO to 80 Shore A. 
   
   
       3 .) The device ( 01 ) from  claim 1  in which cylindrical hub ( 02 ) can stretch its diameter as much as five times. 
   
   
       4 .) The device ( 01 ) from  claim 1  in which the inside diameter of cylindrical hub ( 02 ) is received onto outside diameter of submersible electric trolling motor housing ( 12 ) and held by friction due to constrictive forces caused by the diameter differential. 
   
   
       5 .) The device ( 01 ) from  claim 1  in which appendages ( 03 ) can be non-uniform in length. 
   
   
       6 .) The device ( 01 ) from  claim 1  in which appendages ( 03 ) can be non-uniform in thickness. 
   
   
       7 .) The device ( 01 ) from  claim 1  in which the appendages ( 03 ) can be spaced randomly around circumference of cylindrical hub ( 02 ). 
   
   
       8 .) A damping device ( 01 ) used to reduce the vibrations and sound generated by an electric trolling motor assembly ( 20 ) under propulsion comprising:
 a thermoplastic elastomer;   homogeneous throughout;   a cylindrical hub ( 02 ) with inner diameter sized to receive submersible electric trolling motor housing ( 12 );   with two or more appendages ( 03 ) extending out from cylindrical hub;   with integral masses ( 04 ) at distal end of appendages ( 03 ).   
   
   
       9 .) An electric trolling motor assembly ( 20 ) in combination with accessory damping device ( 01 ) installed over the outside diameter of submersible electric motor housing ( 12 ) comprising the following:
 a singular molded unit of an elastomer material;   with a hollow cylindrical hub ( 02 );   with two or more appendages ( 03 ) extending out from cylindrical hub;   with a continuous peripheral mass ( 05 ) connecting distal ends of appendages ( 03 );   to modify the vibration frequencies generated by the rotating armature of the submersible electric motor ( 12 ).