Class / Patent application number | Description | Number of patent applications / Date published |
181241000 | Adjustable muffler (i.e., internal or external parts) | 8 |
20080314679 | Variable Sound Muffler System - A muffler system includes a housing having two pipes perforated with holes or other shapes that slide or rotate on top of each other. The sliding or rotating pipes allow for varying degrees of alignment of the holes and thereby allow more or less sound dampening. The control of the sound dampening is actuated by an operator via an electric switch that activates at least one of the pipes inside the muffler system to rotate or slide on each other thereby aligning the holes. | 12-25-2008 |
20090107760 | EXHAUST SYSTEM AND MUFFLER WITH REVERSIBLE END-CAPS - An exhaust system is provided with a muffler with reversible end-caps, which allow a tailpipe to be switched over from one side of the muffler to the other before or after it is attached to an engine and mounted on an application. | 04-30-2009 |
20090211841 | Exhaust System for Internal Combustion Engine Having Temperature Variable Acoustics - A muffler for an internal combustion engine featuring two flowpaths for exhaust through the muffler. A first serpentine pathway is substantially longer than a second pathway through the muffler, thereby providing increased sound attenuation. Temperature activated internal valves operate to change the exhaust flowpath from the first flowpath to the second flowpath through the muffler as exhaust gasses warm the muffler and the temperature actuated valves. | 08-27-2009 |
20090229911 | VARIABLE GEOMETRY MUFFLER FOR AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE - A variable geometry muffler for an exhaust system of an internal combustion engine; the muffler displays: a tubular body, which displays an inlet opening, an outlet opening and a labyrinth which determines a path for the exhaust gases from the inlet opening to the outlet opening; and a bypass valve, which is arranged within the tubular body to modify the geometry of the labyrinth according to the exhaust gas pressure; the bypass valve displays a lid, which is coupled to a bypass opening and is mobile from a closed position of the bypass opening to an opening position of the bypass opening by effect of the exhaust gas pressure and against the bias of an elastic body which tends to maintain the lid in the closed position; the elastic body consists of an elastic foil, which is folded as a “U” and displays a mobile end which supports the lid and a fixed end which is opposite to the mobile end and which is integral with a fixed part of the muffler. | 09-17-2009 |
20110214937 | REMOVABLE EXHAUST BAFFLE - A selectively removable exhaust baffle which can be placed within an exhaust pipe to muffle the emitted sound. The removable baffle preferably includes a frame having a pair of legs joined by a spring portion. One or more transverse occluding plates are mounted on the frame. The frame is sized so that when it is pushed into the exhaust pipe it must be compressed. This compression holds the frame in place. The transverse occluding plate or plates lie against the interior wall of the exhaust pipe. The gas flow must therefore pass around the plate or plates, thereby attenuating the sound. | 09-08-2011 |
20150053500 | SYSTEM OF CONTROLLING EXHAUST SOUND OF VEHICLE AUTOMATICALLY AND METHOD OF THE SAME - A system and method automatically controls exhaust sound of a vehicle according to music chosen by a driver for the pleasure of driving. The system may include a media reproducing device which plays music and outputs a music playback signal, a control unit which analyzes a frequency of the music playback signal output from the media reproducing device and generates a drive signal according to the frequency, and a variable valve of a muffler installed in the muffler which adjusts the exhaust sound according to the drive signal output from the control unit. | 02-26-2015 |
20150354421 | MUFFLER - A muffler ( | 12-10-2015 |
20160090884 | MUFFLER FOR AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE - A muffler for an exhaust system of an internal combustion engine comprises: a casing having an inner space, an inlet pipe for sound to enter the muffler, an outlet pipe for sound to exit the muffler, and a separation wall arranged to extend from the inlet pipe to the outlet pipe and being embodied in a manner such as to define first and second acoustical ducts extending through the casing to allow sound propagating along the first acoustical duct to enter the inner space of the casing and to thereafter exit the inner space of the casing again, and to allow sound propagating along the second acoustical duct to acoustically bypass the inner space of the casing. | 03-31-2016 |