Patent ID: 7224088
Filing Date: 2007-05-29
Classification: A01D,G01S

Abstract:
1. An interlock circuit on a mowing vehicle having an engine, an electric power source to provide electric current to a magneto and an ignition, a transmission connected to the engine and having forward, neutral and reverse operations, a controllable tool drive (PTO) connected to the engine for powering an accessory, and a single backup sensor to provide a signal if no object is detected behind the vehicle, the interlock circuit comprising: a reverse sensing switch movable between a first position if the transmission is in forward or neutral, and a second position if the transmission is in reverse; a PTO switch connected to the PTO, the PTO switch movable between an on condition for activating the PTO and an off position for deactivating the PTO; the interlock circuit grounding the magneto and the ignition if a signal from the single backup sensor is interrupted while the reverse sensing switch in the second position and the PTO switch is in the on condition.