Remotely-controlled toy vehicle

A remote control system for a toy vehicle having a steering mechanism and a d-c motor for driving the vehicle, the motor being connected to a battery through a three-position switch having a neutral position, a forward travel position in which the battery voltage is applied to the motor in one polarity, and a reverse travel position in which the battery voltage is applied to the motor in the opposite polarity, said system comprising:

• A. a handset provided with first and second master diaphragm chambers and a handle-operated torsion bar so coupled to the master chamber that when the torsion bar is shifted by its handle from side to side, the first master chamber is either compressed or expanded;
• and when the torsion bar is twisted by its handle clockwise or counterclockwise, the second chamber is either compressed or expanded, said torsion bar being provided at its end with a slot that is slidably engaged by a stud projecting from the diaphragm of the first master chamber, said bar having a side arm provided at its end with a slot that is slidably engaged by a stud projecting from the diaphragm of the second master chamber;
• B. first and second slave diaphragm chambers disposed in said vehicle, the first slave chamber being operatively coupled to said steering mechanism to cause steering in a direction that depends on whether this chamber is compressed or expanded, said second slave chamber being operatively coupled to said switch to cause said switch to assume said forward or reverse position depending on whether this chamber is compressed or expanded;
• and
• C. a pneumatic tether line coupling said first and second handset master chambers to the first and second slave chambers, said line being formed by a pair of flexible pipes.