Patent ID: 7681963

Claim:
A lift truck comprising: a first wheel located on a first side of said truck; a second wheel located on a second side of said truck opposite from said first side; at least one drive motor for driving said lift truck; at least one traction motor controller connected for controlling said at least one drive motor for both moving said truck and for braking said truck, said traction motor controller controlling said at least one drive motor to provide all conventional service braking for said truck; a first brake associated with said first wheel; a second brake associated with said second wheel; wherein said first brake applies a first braking force to provide backup braking, said first brake being operable alone; said second brake applies a second braking force to provide backup braking, said first braking force and said second braking force being unequal to one another; and a brake control for controlling said first and second brakes in the event of a failure resulting in loss of at least one signal for controlling said first and second brakes.