Muffler for air powered turbine drive
Patent 5196653 Issued on March 23, 1993. Estimated Expiration Date: 
May 20, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 20, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3073684 3754620 Plug-type muffler section Particulate trap Patent #: 4645521 InventorApplicationNo. 702570 filed on 05/20/1991US Classes:181/224, Sound absorbing ventilating duct or curb (e.g., a/c, heat, air flow type)181/229, Carburetor, burner, or compressor intake silencer181/266, And side branch chamber181/276Side branchExaminersPrimary: Gellner, Michael L.Assistant: Dang, Khanh Attorney, Agent or FirmInternational ClassE04F 017/04AbstractA muffler for an air powered turbine drive includes a cone section made of perforated metal, a plurality of layers of sintered material on the inner surfaces of the cone section, an inner housing section substantially surrounding the cone section, an inner baffle wall between the inner housing section and the inner cone section, and an outer housing section substantially surrounding the inner housing section. Air entering the muffler through the cone section passes outwardly through the walls of the cone section and is then redirected several times before passing outwardly from the outer housing section in order to attenuate the noise in the air leaving the muffler without creating excessive muffler pressure.Field of SearchSound absorbing ventilating duct or curb (e.g., a/c, heat, air flow type)Carburetor, burner, or compressor intake silencer Underwater discharge With baffle or baffle structure Retroverted And side branch chamber Coaxial foraminous walls Multi-passage With alternating partial baffles along the length of casing Side branch Perpendicular and/or oblique Casings | |
