Car silencer for absorbing sound and exhaust pollutants
Patent 5266755 Issued on November 30, 1993. Estimated Expiration Date: 
November 2, 2012. 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.
November 2, 2012. 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 2014666 Vehicle exhaust system Patent #: 4372421 InventorApplicationNo. 970187 filed on 11/02/1992US Classes:181/252, With sound absorbing material181/240, Manifold type181/243, With repair, replacement, or quick disassembly181/255, Expansion chamber181/256, With sound absorbing material181/258, Pervious material interposed in flow path181/267Coaxial foraminous wallsExaminersPrimary: Gellner, Michael L.Assistant: Dang, Khanh International ClassF01N 001/10AbstractA car silencer includes an outer pipe having a front expansion chamber defined in a front portion of the outer pipe connected with a connecting tube which is connected to an engine manifold for directing waste gas as discharged from a car engine, an inner pipe detachably inserted in a rear expansion chamber in the outer pipe at a rear portion of the front expansion chamber, an absorbing and filtering medium filled in the inner pipe, and a perforated tail pipe inserted in the absorbing and filtering medium, wherein an engine exhaust gas will be reduced its sound in the front and rear expansion chambers and a plurality of pollutants laden in the exhaust gas will be absorbed, filtered and removed in the absorbing and filtering medium for preventing air pollution caused by an engine waste gas.Field of SearchPipe-muffler (e.g., tail pipe type)Separate distinct units serially connected Manifold type With repair, replacement, or quick disassembly With sound absorbing material Expansion chamber With sound absorbing material Pervious material interposed in flow path With baffle or baffle structure Coaxial foraminous walls Expansion chamber type Plural chambers Casings | |
