Patent ID: 7556129
Filing Date: 2009-07-07
Classification: B65B

Abstract:
1. A brake assembly for a tensioning motor for a strapping tool, the motor having a housing and having an output shaft operably connected to a tensioning wheel, the tensioning wheel rotating in a first direction to tension a strap and in a second reverse direction to relieve tension in the strap, the brake assembly comprising: a one-way bearing operably connected to the motor output shaft to permit the shaft to rotate relative to the bearing in the first direction and to stop rotation of the shaft relative to the bearing in the reverse direction, the bearing having at least two stop members thereon; a brake element operably mounted to the motor movable toward and away from the bearing for movement into and out of engagement with one of the bearing stop members, the brake element stopping reverse rotation of the motor shaft and bearing when the brake element is engaged with one of the bearing stop members; a brake release operably connected to the brake element for moving the brake element into and out of engagement with the one of the bearing stop members; a biasing element for biasing the brake element into engagement with the one of the bearing stop members, wherein when the brake is engaged with the one of the bearing stop members, the motor can freely rotate in the first direction and cannot rotate in the second reverse direction, and when the brake release moves the brake element out of engagement with the one of the bearing stop members, the motor can freely rotate in the second reverse direction until the brake release is reengaged with one of the bearing stop members.