Patent attributes
The parking brakes at the drive wheels of a zero turning radius mower are automatically set when a pair of drive levers used for determining speed, steering and forward or reverse travel are placed in their neutral positions and swung outwardly to widespread, operator dismount positions. When the drive levers are widespread, switches associated with a control circuit are opened, allowing air cylinders to immediately exhaust pressurized air so that tension springs may actuate the brake assemblies to set the brakes. When the drive levers are returned to their operating modes and the ignition is turned on, the control switches are closed, energizing the control circuit to pressurize the air cylinders and release the brakes against the bias of the tension springs.
