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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 8051948 | Silencer apparatus with disposable silencer cartridge unit A silencer apparatus for attenuating noise in gas flow systems. The apparatus generally includes a housing having an interior cavity and a gas flow inlet and outlet that are adapted to be connected to a passage such that a gas flowing through the passage enters and ... | 11/08/2011 |
| 8037966 | Roof-mounted muffler for system for generating electric power An exhaust system for an electric power generation system is disclosed. The exhaust system may include a muffler configured to suppress noise associated with operation of an engine associated with the electric power generation system. The muffler may be configured t... | 10/18/2011 |
| 7878299 | Silencer apparatus with disposable silencer cartridge unit A silencer apparatus for attenuating noise in gas flow systems. The apparatus generally includes a housing having an interior cavity and a gas flow inlet and outlet that are adapted to be connected to a passage such that a gas flowing through the passage enters and ... | 02/01/2011 |
| 7434656 | Exhaust device for vehicle engine An exhaust device includes an exhaust pipe connected at its upstream end to a cylinder head of the engine and an exhaust muffler connected to the downstream end of the exhaust pipe for suppressing the generation of noise from a heat insulating cover that covers a pa... | 10/14/2008 |
| 7364011 | Attenuating power booster The present invention includes a power booster pipe suitable for attenuating sound associated with the intake or exhaust of an internal combustion engine and reducing pressure drop associated with movement of gases during operation of the engine. Generally, a diffus... | 04/29/2008 |
| 7350619 | Auxiliary power unit exhaust duct with muffler incorporating an externally replaceable acoustic liner Methods and apparatus are provided for an exhaust duct having an externally replaceable acoustic liner. The exhaust duct includes a forward section that is configured to be axially coupled with a bulkhead collar on the aircraft, a body section that is coupled to the... | 04/01/2008 |
| 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 |
| 7325652 | Bumper/muffler assembly A bumper/muffler assembly is provided comprising a bumper; and a muffler having an outer shell. The outer shell may be formed from a non-high impact resistant material, such as a thin metal or a composite material. The muffler may comprise a separate element from th... | 02/05/2008 |
| 7316292 | Spun extrusion side entry muffler By using a spun extrusion method to form a side entry exhaust inlet, a muffler can be completely stuffed and end caps can be spun onto opposing ends of the muffler on a high speed production line without interruptions. The side entry exhaust inlet is formed within a... | 01/08/2008 |
| 7293629 | Exhaust apparatus for small-sized engine An exhaust apparatus has an exhaust pipe that receives exhaust gas from an engine and a muffler attached to the exhaust pipe. The muffler has an exhaust portion that discharges exhaust gas received by the exhaust pipe. A tubular member is attached to the exhaust por... | 11/13/2007 |
| 7293628 | Shell main body for muffler A cylindrical shell main body constituting a muffler main body is formed of two layers of an inner shell and an outer shell and has a cylindrical shape with a cross section that is not a perfect circle but is defined by alternated small arc portions and large arc po... | 11/13/2007 |
| 7281605 | Mufflers with enhanced acoustic performance at low and moderate frequencies The invention relates to an exhaust silencer or muffler for an internal combustion engine, in particular a silencer with the damping characteristics of a resonator with the absorptive characteristics of a dissipative silencer. The silencer of the present invention p... | 10/16/2007 |
| 7278514 | Acoustic noise filter An acoustic filter is provided with a single flow chamber for exposure of a flexible rubber layer to liquid undergoing flow through the flow chamber with noise producing acoustic energy therein. The flexible rubber layer is supported on a cylindrical drum with slant... | 10/09/2007 |
| 7263827 | Exhaust pipe insulator attaching structure for saddle-riding vehicle An air cleaner and an exhaust pipe insulator attaching structure for a vehicle engine. The air cleaner on a rear side of the engine includes an air cleaner element disposed in an upper portion inside an air cleaner case. An air cleaner intake-air duct is inserted in... | 09/04/2007 |
| 7261755 | Heat-resistant filter layer, filter body, and process for producing the filter layer and the filter body Within the framework of the purification of exhaust gases of mobile internal combustion engines, filter materials are subjected to particularly high thermal and dynamic conditions. As a result, it is advantageous to use filter materials together in a stable and dura... | 08/28/2007 |
| 7240767 | Fixing structure of tail pipe of exhaust pipe A clamping member (2) for clamping a periphery of a rear-end open portion of an exhaust pipe (3) is accommodated in a front-end open portion (11) of a tail pipe (1). The clamping member (2) has a pair of plate parts (21, 22)... | 07/10/2007 |
| 7228935 | Attachment pin for an exhaust-gas muffler The invention relates to an attachment pin (1) for fixing an exhaust-gas muffler (2) in an apparatus part (4) of a portable handheld work apparatus (5) driven by an internal combustion engine. The exhaust-gas muffler (2) includes e... | 06/12/2007 |
| 7225504 | Noise suppressor for use with vacuum air cleaner A noise suppressor for use with the vacuum air cleaner includes an enclosed casing. On the casing, there are an air intake end and an air outlet end. Between the air intake end and the air outlet end, there is the noise suppressing chamber. At the air intake end and... | 06/05/2007 |
| 7191868 | Combined silencer and spark arrester A silencer for silencing exhaust gases includes an acoustic resonator chamber that serves as a spark arrester to trap burning carbon particles and prevent them passing to the atmosphere. The silencer has an exhaust gas inlet and an exhaust gas outlet. Exhaust gases ... | 03/20/2007 |
| 7188621 | Portable ventilator system A portable ventilator uses a ROOTS-type blower as a compressor to reduce both the size and power consumption of the ventilator. Various functional aspects of the ventilator are delegated to multiple subassemblies having dedicated controllers and software that intera... | 03/13/2007 |
| 7156202 | Method and apparatus for venting exhaust gas from an engine A muffler for coupling to an exhaust port of an internal combustion engine. The muffler includes a housing having an exhaust inlet configured to receive exhaust gas from the engine, at least one internal expansion chamber and an outlet opening. The muffler further i... | 01/02/2007 |
| 7147074 | Snowmobile A snowmobile including a chassis, shell, and an engine. The shell may be fixed to a front portion of the chassis and extend away from the chassis in a forward direction. The shell may be disposed forward of the steering axis. The shell may define a chamber that flui... | 12/12/2006 |
| 7100736 | Serviceable muffler A serviceable muffler (20) has an end plate (34) releasably clamped (36) to an open end (30) of a muffler body (26) and permitting access to an internal catalytic or filter element (28) for removal and replacement. An apertu... | 09/05/2006 |
| 7051523 | Exhaust system assemblies employing wire bushings for thermal compensation Exhaust system assemblies employ wire bushings for thermal compensation to minimize noise due to “stick-slip” while the system cools. In a preferred embodiment, the wire bushings are formed of at least one strand of wire coiled about male end portions of pipe se... | 05/30/2006 |
| 7044266 | Exhaust muffler for internal combustion engines Performance sound is produced with a muffler that includes a casing with front (5, 37), rear (7, 41) and side (3, 35) walls, first (9, 45) and second (11, 47) compartment walls each with a central passage (25, 28, 46, 48) an... | 05/16/2006 |
| 6983820 | Noise and vibration suppressors In order to form a noise suppressor in a hose of e.g. a motor vehicle, modular portions are connected in series to define suppression chambers with particular noise suppression characteristics. Those characteristics are due to the volume of each chamber, to the size... | 01/10/2006 |
| 6968922 | Exhaust apparatus for vehicle An exhaust apparatus for a vehicle includes a spark arrester having a tubular spark arrester body assembled on a rear portion of a muffler connected to an exhaust pipe. A tail pipe is inserted in the spark arrester body and is mounted on the spark arrester such that... | 11/29/2005 |
| 6941710 | Columnar jack concealing device The present invention provides a device for concealing and covering a columnar jack for columnar supports and a method of concealing a columnar jack using a columnar jack concealing kit. The device comprises a strap member, a skirt sized and shaped for covering the ... | 09/13/2005 |
| 6942061 | Muffler for internal combustion engine A performance muffler suitable for installation into an exhaust system for an internal combustion engine wherein either end of the muffler may be designated as the entrance end for the receipt of exhaust gases into the muffler without materially altering the functio... | 09/13/2005 |
| 6923943 | Exhaust catalytic converter/muffler A catalytic converter assembly, for use in the exhaust systems of vehicles or machinery using internal combustion engines, consisting of a square tube, with perforated rectangular baffles made from common sheet metal of stainlees-steel, folded at angles, affixed wit... | 08/02/2005 |
| 6913111 | Mountable discharge pipe for an end muffler as well as an end muffler for motor vehicle A mountable discharge pipe for an end muffler has devices for fastening the discharge pipe to an end muffler housing. A hook provided on the discharge pipe can be suspended at the end muffler housing, and a holding lug provided with an opening is arranged at the dis... | 07/05/2005 |
| 6837335 | Replaceable catalyst for exhaust system A new and improved exhaust system as described herein, wherein the catalytic cartridge is selectively replaceable. The catalytic cartridge, which contains the catalyst, is located within the baffle tube. The baffle tube is easily inserted and removed from the housin... | 01/04/2005 |
| 6585078 | Muffler insert An insert assembly for a muffler of a high-performance motor cycle, having an insert with a filling of compressed heat-resistant, sound-absorbing material mounted on a removable hollow tube having an inside diameter greater than the outside diameter of th... | 07/01/2003 |
| 6575267 | Exhaust component having multiple-plated outer shell A housing for an exhaust component having a longitudinal axis, an outer shell, an inner shell positioned within the outer shell, an expanding joint for permitting relative longitudinal movement of the inner and outer shells in response to temperature diff... | 06/10/2003 |
| 6543577 | Silencer A silencer (10) includes a polymeric casing (12) spaced from at least one inlet pipe and at least one outlet pipe by polymeric spacers (52). The polymeric spacers are made from a different material to that of the polymeric casing. The polymeric spacers ar... | 04/08/2003 |
| 6470998 | Modular muffler with end plate adaptors and spark arresters A modular muffler that is quickly and easily adapted for use with a wide variety engines is disclosed. The muffler has a dimensionally standardized body member with end portions that may receive any of a number of adaptor end plates provided with various ... | 10/29/2002 |
| 6457551 | Replaceable muffler structure with an adjustable length A replaceable muffler structure with an adjustable length includes a muffler, a tail pipe having a rear end provided with an insertion section movably mounted in a rear end of the muffler, and a positioning ring mounted on the rear end of the muffler for ... | 10/01/2002 |
| 6438949 | Cover member attachment structure Heat shielding panels are attached to exhaust pipes and a silencer by using small set springs and large set springs. Distortion on a heat shielded panel, which would be caused when attaching a heat shielding panel through welding, is not caused. A process... | 08/27/2002 |
| 6415889 | Stamped-formed muffler apparatus and assembly process A muffler and method of making a muffler is disclosed wherein the muffler is formed from a single sheet showing four portions separated by three folds lines and wherein the two center portions are formed with tube outlines such that when the center portio... | 07/09/2002 |
| 6405827 | Lock seam for canisters A lock seam for joining a first edge of material to a second edge of material is described. The first edge is wrapped in a first curl such that the first curl is substantially circular in shape. The second edge is wrapped in a second curl which is also su... | 06/18/2002 |
