ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,847, issued on June 17, was assigned to Fisher Controls International LLC (Marshalltown, Iowa).
"Noise attenuation assembly for flow control devices" was invented by Wade Helfer (Marshalltown, Iowa).
According to the abstract* released by the U.S. Patent & Trademark Office: "A valve, such as a ball valve, can include a noise attenuation assembly to control fluid expansion through the valve and provide noise abatement. The valve can include a valve body and a valve stem and the noise attenuation assembly can include a flow control body and a trim body. The flow control body can be coupled to the valve stem and the flow control body can be configured to selectively permit fluid flo...