Patent ID: 6079569
Filing Date: 2000-06-27
Classification: B06B,B07B

Abstract:
An ultrasonic sieving apparatus comprising a de-coupler for enabling a combination of a transducer and a first resonator to be supported with respect to a sieve which includes a separation medium provided in a frame, such that vibrations generated by the transducer are transmitted to the separation medium via the first resonator, the first resonator being of substantially circular cross-section and having first dimensions, wherein the ultrasonic de-coupler is of substantially circular cross-section and of second dimensions connected to and concentrically with the first resonator and which in use is attached to a bracket adapted to mount the de-coupler onto the frame, the first dimensions of the first resonator being such that the first resonator is connected to the transducer at an anti-node and the second dimensions of the ultrasonic de-coupler being such that it is connected to the first resonator at a node.