Patent ID: 6694837
Filing Date: 2004-02-24
Classification: F16H,Y10T

Abstract:
In a scale model vehicle including a chassis, a main drive shaft mounted on the chassis for clockwise and counterclockwise rotation, drive wheels coupled to the main drive shaft for propelling the vehicle in forward and reverse directions, an internal combustion engine having a rotary power output shaft, and a transmission assembly coupled to the rotary power output shaft for transmitting torque from the engine to the main drive shaft, the transmission assembly comprising:a first clutch coupled to the main drive shaft for transmitting torque in a clockwise direction; a first spur gear attached to the first clutch; a second clutch coupled to the main drive shaft for transmitting torque in a counterclockwise direction; a second spur gear attached to the second clutch; and, a clutch bell coupled in torque transmitting engagement with the main drive shaft, the clutch bell being movable along the main drive shaft to a forward drive position in which the clutch bell is engagable with the first clutch for transmitting torque to the main drive shaft in the clockwise direction, and movable to a reverse drive position in which the clutch bell is engagable with the second clutch for transmitting torque to the main drive shaft in the counterclockwise direction; a first pawl mounted on the first clutch for pivotal movement from a radially retracted position to a radially extended position; a second pawl mounted on the second clutch for pivotal movement from a radially retracted position to a radially extended position; and first and second bias springs coupled to the first and second pawls, respectively, for urging the pawls toward the retracted positions and yieldably opposing radial extension of the first pawl and second pawl, respectively.