Patent ID: 8978840
Filing Date: 2015-03-17
Classification: B64C,F16D

Abstract:
1. A brake for incorporation into a mechanical movement system comprising: an electric fail-safe brake that may be provided with power, or disconnected from power, and said electric fail-safe brake being operable to move a first ramp between distinct positions when provided with power in a first condition and when not provided with power in a second condition, and said first ramp being associated with a second ramp, and there being balls intermediate said first and second ramps, and wherein when said electric fail-safe brake is in an actuated one of said first and second conditions, said second ramp forces stationary brake disks to engage rotating brake disks which rotate with a shaft to cause braking of the shaft; and there being a keeper associated with said second ramp which abuts a stop surface to limit the amount of torque applied to said rotary and stationary disks after a predetermined amount of braking force has occurred; wherein a hub is associated with said shaft and a ramp spring biases said second ramp away from said hub with said keeper limiting the amount of compression of said ramp spring.