Braking system for a lift truck
First Claim
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1. 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;
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 immobilize said truck; and
said second brake applies a second braking force to immobilize said truck, said first braking force and said second braking force being unequal to one another.
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Abstract
A braking system for a lift truck performs all service braking using truck traction drive motors. Mechanical, spring applied, electrically released brakes are coupled to wheels on opposite sides of the truck with the mechanical brakes applying unequal braking forces to the wheels. The mechanical brakes perform park braking and, in the event an electrical system problem arises, backup braking as well that can be modulated by an operator of the truck regardless of the operating condition of the truck.
17 Citations
26 Claims
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1. A lift truck comprising:
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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;
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 immobilize said truck; and
said second brake applies a second braking force to immobilize said truck, said first braking force and said second braking force being unequal to one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for operating a lift truck having first and second wheels located on first and second sides of said truck, respectively, a first brake associated with said first wheel, a second brake associated with said second wheel, an operator controlled service brake request device, a mast assembly along which forks are raised and lowered, and a mast height sensor, said method comprising:
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applying a first braking force with said first brake to immobilize said truck; and
applying a second braking force with said second brake to immobilize said truck, said first braking force being unequal to said second braking force. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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Specification