Patents
Sitemap › F01 - Machines or engines in general; Engine plants in general; Steam engines › F01N - Gas-flow silencers or exhaust apparatus for machines or engines in general; Gas-flow silencers or exhaust apparatus for internal-combustion engines › F01N 1 - Silencing apparatus characterised by method of silencing
Patents for F01N 1 - Silencing apparatus characterised by method of silencing (8,998)
12/1989
12/19/1989US4887692 Noise reducing device for marine propulsion
12/14/1989DE3915739A1 Silencer for the internal combustion engine of motor vehicles, especially of three-wheelers
12/13/1989CN2049267U Petrol engine air supply cleaner
12/13/1989CN2049266U Bowl type exhaust silencer
12/05/1989US4884657 Muffler
11/1989
11/29/1989EP0343607A2 Air supply and exhaust control systems for internal combustion engines
11/29/1989CN1037563A Energy-saving safety silencer for exhaust of internal-combustion engine
11/15/1989CN2047724U Feeding-type gas muffler
11/14/1989US4880078 Exhaust muffler
11/14/1989CA1262869A1 Combined muffler and catalytic converter exhaust unit
11/08/1989EP0340326A1 Exhaust silencer
11/07/1989CA1262711A1 Exhaust silencer casings
11/01/1989CN1036817A Rotation mechanism
11/01/1989CN1036814A Exhaust muffler of internal combustion engine
10/1989
10/18/1989CN1036435A Exhaust, safety and energy-saving muffler for internal-combustion engine
10/17/1989US4874062 Muffler
10/11/1989EP0335941A1 A silencer device for exhausts of motors and similar, with acoustic interference
10/10/1989US4872528 Muffler construction
10/04/1989CN2045537U Airflow counteracting muffler
09/1989
09/28/1989DE3807948A1 Silencer for vehicle engines
09/27/1989EP0333815A1 An exhaust gas apparatus for internal combustion engines provided with a device for housing filters designed to trap solid particles and unburned hydrocarbons entrained in exhaust gases
09/21/1989WO1989008771A1 Silencer for a gas flow
09/20/1989CN2044644U Motorcycle silencer
09/19/1989US4867270 Exhaust gas muffler for a two-stroke engine
09/19/1989US4866933 Exhaust silencer
09/14/1989DE3810755C1 Resonator-type silencer for internal combustion engines
09/13/1989EP0331885A1 Exhaust gas filter
09/13/1989CN1035551A Iaminar muffler
09/12/1989US4865154 Muffler with drain holes
09/05/1989US4862993 Fireplace flue ambient noise reducing device
08/1989
08/30/1989CN2043669U Flexible silencing apparatus
08/29/1989US4860853 Stamp formed muffler with nonplanar array of tubes
08/24/1989WO1989007701A1 Active sound attenuation system for engine exhaust systems and the like
08/23/1989EP0329165A2 Engine-control apparatus
08/23/1989CN2043278U Spiral-flow type muffler
08/22/1989US4858722 Self-contained muffler attachment and conversion kit for small two-cycle engines
08/17/1989DE3803917A1 Honeycomb-shaped catalyst support body having equalised intake flow
08/17/1989DE3803152A1 Reciprocating piston internal combustion engine
08/16/1989EP0328056A2 Muffler
08/09/1989CN2042515U Micro-perforated exhaust silencer
08/08/1989US4854417 Exhaust muffler for an internal combustion engine
08/02/1989CN2042112U Fast-mounted low-noise boiler blower and aspirator
07/1989
07/26/1989EP0324891A1 Exhaust muffler
07/26/1989CN2041727U Vortex exhaust muffler
07/25/1989US4851298 Multi-layer tube of a muffler for an internal combustion engine
07/25/1989US4851015 Muffler apparatus with filter trap and method of use
07/18/1989US4848513 Noise abatement muffler
07/11/1989US4846302 Acoustic muffler
07/11/1989US4846301 Silencer
07/05/1989EP0323039A2 Air cooling system in an internal combustion engine
06/1989
06/28/1989CN1004644B Muffler apparatus and method for making same
06/27/1989US4842096 Automobile muffler
06/27/1989US4841728 Straight through type muffler for generating the exhaust flow from an internal combustion engine
06/21/1989CN2039744U Wave-shaped connterflow sound damper
06/21/1989CN2039743U Sound insulating cover for boiler blower
06/20/1989US4840234 Pneumatic ram boring machine
06/20/1989US4840030 Tail pipe structure of control type muffler
06/14/1989CN2039350U Combined muffler with folded plate and arc prism combined
06/06/1989US4836330 Plural chamber stamp formed muffler with single intermediate tube
06/01/1989DE3837677A1 Silencer functioning at high operating temperatures, especially for a motor vehicle internal combustion engine
05/1989
05/30/1989US4834214 Muffler for an internal combustion engine
05/24/1989EP0316640A1 Low-frequency silencer
05/24/1989DE3837173A1 Exhaust gas silencer
05/18/1989DE3832987A1 Silencer for internal combustion engines
05/10/1989EP0315098A1 Heat exchanger for heating liquid fluids
05/05/1989WO1989003472A3 A silencer device for exhausts of motors and similar, with acoustic interference
05/05/1989WO1989001566A3 Particulate filter module
05/03/1989EP0313944A1 Method to reduce the flight noise for aircraft provided with propellers moved by piston engines
04/1989
04/20/1989WO1989003472A2 A silencer device for exhausts of motors and similar, with acoustic interference
04/18/1989US4821840 Stamp formed exhaust muffler with conformal outer shell
04/18/1989US4821691 Portable engine unit
04/13/1989DE3732700A1 Silencer for exhaust systems in motor vehicles
04/12/1989EP0310751A2 Stamp formed muffler with multiple low frequency resonating chambers
04/12/1989EP0310621A1 Aircraft cabin noise control apparatus
04/06/1989WO1989002778A1 An exhaust system for internal combustion engines provided with a device for housing filters designed to trap solid particles and unburned hydrocarbons entrained in exhaust gases
04/05/1989EP0310441A2 Engine control device
04/05/1989EP0309776A2 Covering for construction elements and its manufacturing process
04/05/1989CN2035385U Mining fan muffler
04/04/1989US4817374 Exhaust control device of engine
03/1989
03/22/1989EP0307639A1 Silencing method in gas conducting devices with variable dynamic pressure in the flow, especially in exhaust devices of internal-combustion engines
03/08/1989CN1031595A Airflow noise-elimination method and apparatus
03/07/1989US4809812 Converging, corridor-based, sound-attenuating muffler and method
03/07/1989US4809502 Power equipment
02/1989
02/28/1989US4807439 Exhaust gas system with silencer for a turbocharged internal combustion engine
02/23/1989WO1989001566A2 Particulate filter module
02/21/1989US4805733 Active silencer
02/08/1989CN2032251U Exhaust silencer
02/02/1989DE3724087A1 Exhaust silencer
02/01/1989EP0229148B1 Silencer
02/01/1989CN2031839U Muffler for i.c.e.
01/1989
01/25/1989CN2031446U Exhaust silencer of internal combustion engine
01/12/1989WO1989000237A1 Method and apparatus for control of fluids
01/11/1989EP0298379A1 Exhaust silencer
01/04/1989CN2030259U Automobile exhaust silencer with purification effect
12/1988
12/29/1988WO1988010361A1 Exhaust system for a combustion engine
12/28/1988EP0296270A1 Method for making a seamed or flanged connection between tubes and end closures, and apparatus, especially for carrying it out
12/28/1988CN87210874U Exhaust silencer
12/27/1988US4793544 Method of producing a multi-layer tube of a muffler
12/21/1988CN87212803U Safty and ecnomizing energy exhaust muffler for internal combustion engine
12/20/1988US4792014 Tail pipe for drafting engine exhaust gas
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