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| Number | Title | Issue Date |
| 8104572 | Spin muffler A muffler for attenuating acoustic noise in a gas flow which includes a casing having an inlet and an outlet, such that the gas flow passes through the casing from the inlet to the outlet. The muffler also includes an acoustic trap disposed within the casing and whi... | 01/31/2012 |
| 7380639 | Backpressure reducing exhaust system with stationary blade structure The present invention provides an exhaust chamber system, comprising a stationary propeller type blade assembly with a nose cone within or adjacent to an expansion chamber, to create a vortex that swirls exhaust gas towards the outlet. The resultant vacuum within th... | 06/03/2008 |
| 7350620 | Compact silencer There is disclosed a silencer for attenuating sound waves produced in a fluid that circulates through a fluid conveyer. The silencer comprises an expansion chamber that is in fluid communication with the fluid conveyer, and which carries sound waves there through; a... | 04/01/2008 |
| 7331422 | Vortex muffler A muffler includes an inner passage residing in an outer shell, and a stationary fan residing in the inner passage. The fan creates a vortex in a flow through the inner passage thus improving the flow and reducing the exhaust sound level. The inner passage includes ... | 02/19/2008 |
| 7063134 | Combined muffler/heat exchanger A combined muffler and heat exchanger apparatus is provided. The apparatus includes a housing defining a heat transfer chamber and an acoustic attenuation chamber separated by a partition. A flow regulator and a fluid transport member are disposed within the heat tr... | 06/20/2006 |
| 7052247 | Suction muffler for compressors, compressor with the suction muffler, and apparatus having refrigerant circulation circuit including the compressor Disclosed herein are a suction muffler for compressors, a compressor with the suction muffler, and an apparatus having a refrigerant circulation circuit including the compressor. The present invention allows an amount of a refrigerant sucked into a compression chamb... | 05/30/2006 |
| 7032709 | Exhaust-gas muffler An exhaust-gas muffler includes a muffler housing (2) having an inlet opening (3) and an outlet (4). The exhaust-gas muffler is especially for the internal combustion engine in a portable handheld work apparatus. At least one attenuating space (... | 04/25/2006 |
| 6959782 | Tuned exhaust system for small engines A tuned exhaust system for small two cylinder engines, the exhaust system including a pair of exhaust passage through which exhaust gasses pass. The exhaust passages are dimensioned to providing a tuning effect to the exhaust gasses for enhanced engine performance. ... | 11/01/2005 |
| 5669762 | Sound and pulsation reducing outlet chamber for an air compressor An air chamber structure for a medical air compressor, the chamber being provided between the pump and an air bed. Two flow guiding stubs are provided at an air input end to scatter air and render it to revolve in a storage chamber with a smaller space, t... | 09/23/1997 |
| 5670757 | Exhaust silencer for engines and generators An exhaust silencer for receiving exhaust gasses from an engine includes inner and outer cylindrical walls and top and bottom closure plates. The inner wall and the top and bottom closure plates define a central collection chamber. Baffles extend alternat... | 09/23/1997 |
| 4747761 | Silencer-carrying rotary vane pump A silencer-carrying rotary vane pump wherein a hollow portion is provided between inner and outer circumferential walls of a cylindrical center case of the vane pump. The hollow portion is closed with side covers to form a sealed chamber through which a p... | 05/31/1988 |
| 4685534 | Method and apparatus for control of fluids A basic new method and devices for treating flowing substances such as subdivided solids, colloids, gels, liquids and gases, under varying temperatures, pressure and velocity conditions is disclosed. The method is characterized by forming three concentric... | 08/11/1987 |
| 4655694 | Housing assembly for motor/fan means of a wet/dry vacuum cleaner A bypass type vacuum includes a casing constructed of a cover and a motor housing disposed within the cover. A first circular partition of the motor housing defines a main expansion chamber which receives working air that is driven radially through side o... | 04/07/1987 |
| 4623035 | Muffler of the sound reflecting type for use with internal combustion engines A muffler is disclosed comprising a closed housing having an annular inlet and an annular outlet neck, and the housing having arranged therein a pair of axially extending pipes which are at least partially overlapping one another. One of the pipes is conn... | 11/18/1986 |
| 4538701 | Muffler Improvements in the attenuation of sounds emitted by an internal combustion engine exhaust system are achieved by shaping a muffler housing to substantially eliminate flat sound radiating surfaces, providing a circuitous exhaust gas flow path within the m... | 09/03/1985 |
| 4346783 | Apparatus for treating flowing working gases particularly to reduce the noise in operation thereof A device for treating flowing working gases in order to reduce their operational noises and in most instances also to increase their operating efficiency comprises a flowing working gas operating device which has a discharge conduit with at least one disc... | 08/31/1982 |
| 4285916 | Exhaust gas pollution control system An exhaust gas pollution control system (10) for purification of exhaust gases passing from a combustion chamber. The control system (10) includes a housing element (14) which extends in a longitudinal direction (12). The housing element (14) encompasses ... | 08/25/1981 |
| 4162904 | Silencer-separator device A silencer-separator having a cylindrical casing of circular cross section which is divided into an upper separator chamber and a lower expansion chamber. An inlet pipe directs a gas stream into the expansion chamber, and a pair of angularly disposed tube... | 07/31/1979 |
| 4147230 | Combination spark arrestor and aspirating muffler A spark arrestor aspirating muffler for an internal combustion engine which comprises an outer body or housing having an exhaust gas inlet in one end and a gas outlet in the opposite end. Located immediately upstream of the outlet is a venturi and air is ... | 04/03/1979 |
| 4105089 | Flow distributor for gas turbine silencers Gas turbine exhaust quieting means wherein the low frequency noise which is normally generated by turbulence in the gas turbine exhaust, is suppressed by means of a turbulence suppressing flow distributor. Said flow distributor comprising an elongated, ho... | 08/08/1978 |
| 3970167 | Rotary flow muffler A device for silencing the exhaust of an internal combustion engine. The interior of a hollow body member is divided into first, second and third chambers by first and second baffle members. An inlet port allows the exhaust from the engine to enter the fi... | 07/20/1976 |
| 3963092 | Exhaust muffler for competition car engines An exhaust muffler for competition car engines has a cylindrical, outer or main shell with an inlet at one end smaller than or the same diameter as the main shell and with an outlet at the other end smaller in diameter than the main shell. Inside the main... | 06/15/1976 |
