Abstract: A towed vehicle brake actuation system comprising an adjustable inertia activated switch and a relay in series and a radio transmitter, all in the towing vehicle where an electrical signal must pass through both the switch and the relay before the towed vehicle brake actuation system is actuated. When the switch and a brake light switch in the towing vehicle are both activated, an electric current passes to the radio transmitter which sends a signal to a radio receiver in a towed vehicle which activates a first towed vehicle relay that permits current to pass on to a towed vehicle adjustable inertia activated switch which upon actuation by towed vehicle deceleration permits current to pass through a second towed vehicle relay to a vacuum valve that is a part of the towed vehicle brake actuation system.

Abstract: A towed vehicle brake actuation system featuring an adjustable inertia switches, each in series with a relay with a solonoid coil.

Abstract: The present invention is a vacuum operated brake actuation sytem for actuating a towed vehicle's brake system. In a preferred embodiment it comprises a source of vacuum, a vacuum level sensor and switch, an electrically operated, spring return, four way, two position, vacuum valve with speed controls, and a double acting vacuum operated cylinder that actuates the towed vehicle's brake pedal which actuates the towed vehicle's brake system as the cylinder is directed by the valve. The preferred embodiment also comprises electrical wiring, vacuum hoses, fittings, connections, check valves, a breakaway switch, and other miscellaneous bracketry and hardware as required to complete the system. A vacuum pump along with a vacuum level sensor and switch for monitoring vacuum levels and passing electrical power to operate the vacuum pump as required are included in the preferred embodiment of the present invention.