Patent ID: 7694796

Claim:
A load torque blocking device for automatically blocking load-side torques when a drive-side torque drops off or ceases, while retaining the ability to transfer drive-side torques, that includes a frame-mounted housing ( 11 ) with a central housing bore ( 12 ), a rotatably mounted drive shaft ( 17 ), which extends into the housing bore with axially extending engaging means ( 19 ), a rotatably mounted driven shaft ( 34 ), which also extends into the housing bore with axially extending engaging means ( 37 ), and with a plurality of clamping bodies ( 24 ) located eccentrically in the housing bore and axially supported in an annular cage ( 23 ), which are pivotably mounted such that they are capable of being locked in position or fixedly clamped against a wall of the housing bore via load-side torques of the engaging means of the driven shaft, and which are capable of being disengaged from the wall of the housing bore and driven in a circulating manner via drive-side torques of the engaging means of the drive shaft, wherein the engaging means ( 37 ) of the driven shaft ( 34 ) are located such that they interact with the engaging means ( 19 ) of the drive shaft ( 17 ) when drive-side torques are produced, and such that they interact with the at least one clamping body ( 24 ) when output-side torques are produced, wherein the annular cage ( 23 ) is configured such that the plurality of clamping bodies ( 24 ) are pivotably mounted and distributed evenly around a circumference, and wherein each of the plurality of clamping bodies ( 24 ) include swivel means ( 33 ) configured to interact with the engaging means ( 37 ) of the driven shaft ( 34 ) when load-side torques are produced.