Patent ID: 7028454
Filing Date: 2006-04-18
Classification: F16D

Abstract:
1. In agricultural equipment, construction machinery, machine tool, or appliances, including an over running clutch having an input connected in rotatably driven relation to a source of rotatable power, and an output connected in rotatably driven relation to rotatable elements of a picking unit, the input and output being jointly rotatable along a path of rotational movement when the input and output are engaged such that the power source will rotate the rotatable elements at a desired rotational speed, and the input and output being rotatable one relative to the other along the path of rotational movement in an over running condition, and the improvement comprising; a sensor operable in a first state when a predetermined magnetic field is absent, and operable in a second state when the predetermined magnetic field is present; a magnetic actuator mounted near a first of the input or the output and operable for emitting the predetermined magnetic field; and a shield disposed on a second of the input or the output in a position for shielding the sensor from the actuator when the input and the output are jointly rotating in the normal condition, and such that when the input and the output are in the overrunning condition the shield will be at least intermittently positioned to allow the sensor to be sufficiently exposed to the magnetic field to change the state of the sensor.