Patent ID: 8430131

Claim:
A stackable noise attenuating disk comprising: an inner perimeter edge; an outer perimeter edge; a plurality of inlet passages disposed along the inner perimeter edge; a plurality of outlet passages disposed along the outer perimeter edge, the plurality of outlet passages including a plurality of first outlet passages and a plurality of second outlet passages, each of the plurality of first outlet passages having a first width and each of the plurality of second outlet passages having a second width that is greater than the first width, wherein the plurality of inlet passages and the plurality of outlet passages are arranged such that fluid entering one of the plurality of inlet passages exits through one or both of the plurality of first outlet passages and the plurality of second outlet passages, and wherein the first outlet passages and second outlet passages cooperate to disperse the noise peak frequencies of fluid exiting the plurality of outlet passages, thereby reducing the overall noise level of fluid exiting the plurality of outlet passages, wherein each of the plurality of first outlet passages and the plurality of second outlet passages are defined by a first lateral edge, a second lateral edge, and a circumferential inner edge, and wherein the first lateral edge and the second lateral edge of each of the plurality of first outlet passages and the plurality of second outlet passages have the same length.