Patent ID: 8663042
Filing Date: 2014-03-04
Classification: A01D,Y10T

Abstract:
1. An apparatus for driving and braking a shaft powered by a motor, the apparatus comprising: a shaft in a housing; a pulley driven by the motor, the pulley being positioned above the housing; means for biasing the pulley downward toward the housing, means for translating the pulley away from the housing; wherein the apparatus has a stopped position in which the pulley and the housing are in contact at a friction surface between the pulley and the housing, wherein the apparatus has a driving position in which the pulley and the housing are separate at the friction surface and the shaft rotates, wherein, when power is delivered from the motor to drive the pulley, the means for translating transitions the apparatus from the stopped position to the driving position such that the pulley and the housing are separate at the friction surface and the pulley drives the shaft and the shaft rotates, and wherein, when power ceases being delivered from the motor to drive the pulley, the apparatus moves from the driving position to the stopped position such that the pulley and the housing are placed in contact at the friction surface and the shaft stops, and wherein the means for translating comprises: wherein, when power is delivered from the motor to drive the pulley, the apparatus moves from the stopped position to the driving position by way of travel of the first bearing surface on the bearing from the first stop to the second stop and travel of the second bearing surface on the bearing from the third stop to the fourth stop such that the pulley and the housing are separate at the friction surface and the shaft rotates, and wherein, when power ceases being delivered from the motor to drive the pulley, the apparatus moves from the driving position to the stopped position by way of travel of the first bearing surface on the bearing from the second stop to the first stop and travel of the second bearing surface on the bearing from the fourth stop to the third stop such that the pulley and the housing are placed in contact at the friction surface and the shaft stops.