Patent ID: 7104351
Filing Date: 2006-09-12
Classification: B62K

Abstract:
1. In a vehicle having, a frame, at least one driven wheel rotating from a wheel rotation point on the frame, a driven sprocket driving the driven wheel rotating with the wheel from the wheel rotation point on the frame, a motor mounted to the frame, a driving sprocket mounted to a motor sprocket rotation point and powered for driving rotation, the driving sprocket disposed in a plane including the driven sprocket, and a chain within the plane including the driving sprocket powered, the driven sprocket for driving the driven wheel, an improved mount for mounting the motor from the frame relative to the driven sprocket comprising: a motor mount for fastening to the motor for disposing the driving sprocket from the motor overlying the driven sprocket powering the driven wheel; a motor mount pivot on the motor mount for pivoting the driving sprocket along the plane including the chain and driven sprocket; a keeper slot mounted to the motor mount, the keeper slot coaxial about the pivot to enable a keeper to slide relative to the keeper slot during pivot of the motor mount about the motor mount pivot; a motor mount pivot point on the vehicle frame for permitting the motor mount to be pivotally mounted to the frame, whereby upon pivot of the motor mount with respect to the frame the distance between the wheel rotation point on the frame and the motor rotation point on the motor changes to correspondingly change tension within the chain; the chain dimensioned to maintain the motor mount pivot point offset with respect to a line between the wheel rotation point on the frame and the motor rotation point on the motor; a keeper mounted to the frame for adjustably locking the keeper slot of the motor mount at a constant angle relative to the frame pivot point to inhibit keeper and/or motor movement, whereby chain tension is adjustable through pivot of the motor mount at the motor mount a pivot relative to the driven sprocket to change the distance between the driving sprocket of the motor and the driven sprocket at the wheel bar.