Patent attributes
A braking system may include a first brake, a parking brake, a warning system, and a control system. A parking brake system may allow an operator to selectively engage the parking brake. The control system may include a first brake detector that indicates when the first brake is engaged, a parking brake detector that indicates when the parking brake is engaged, and a door state detector that indicates when a door open. The control system may selectively activate a portion of the parking brake system when the first brake is engaged, activate the warning system when the door is open and the parking brake is engaged, and activate the warning system when the door is open, the parking brake is engaged, and the first brake is engaged. A speed sensor may be used to prevent the parking brake from engaging above a predetermined speed.
