Patent ID: 9739408
Date: 2017-08-22
CPC Classifications: F16L,G10K

Claim:
1. A noise attenuation apparatus comprising: a first plate having a plurality of first openings to reduce noise generated by a fluid flowing through a fluid device, the first plate includes a first aperture and a second aperture, the second aperture being positioned between a peripheral edge and a central axis of the first plate, and the first aperture being positioned between the second aperture and the central axis of the first plate; and a second plate having a plurality of second openings to reduce noise generated by the fluid, the second plate to directly engage the first plate, the first openings to at least partially align with the second openings when the first plate is in direct engagement with the second plate to define a flow passageway of the noise attenuation apparatus, the second plate includes a third aperture and a fourth aperture, the fourth aperture being positioned between a peripheral edge of the second plate and a central axis of the second plate, wherein the first aperture of the first plate is to align with the third aperture of the second plate to receive a first fastener to couple the first plate and the second plate, and wherein the second aperture of the first plate is to align with the fourth aperture of the second plate to receive a second fastener when the first plate is coupled to the second plate.