Class 181/276 - Side branch

Subclass of Class 181 - Acoustics
Definition: Subject matter having cushion, acoustic filter, or resonator
No. of applications: 24
Last issue date: 04/07/2011

Application No.	Application Title	Issue Date
20110079462	MUFFLING DEVICE A muffling device has a muffling piece that is placed in an airflow path and muffles sound caused by airflow, and a drive unit that performs one of rotation and movement of the muffling piece....	04/07/2011
20110073406	Acoustic Silencer A resonator is disclosed which includes: a sleeve insert and an outer duct sealingly coupled to the sleeve insert. The sleeve insert has a wall with a first aperture in the wall at a first axial distance, a second aperture in the wall at a second axial distance, and a r...	03/31/2011
20110061970	ACCOUSTIC ATTENUATION DEVICE FOR AN INTAKE LINE OF A COMBUSTION ENGINE AND INTAKE LINE INCORPORATING SAME The present invention relates to an acoustic attenuation device for an intake line of an internal combustion engine and to an intake line such as this incorporating same. An acoustic attenuation device according to the invention is intended to have a flow of pressurized...	03/17/2011
20100193284	EXHAUST CHAMBER FOR THE EXHAUST LINE OF AN AUTOMOBILE The exhaust chamber for a motor vehicle exhaust line includes: a main envelope defining a main enclosure and having an exhaust gas inlet and an exhaust gas outlet; and at least one saucer-shaped shell having an opening defined by a peripheral edge of the shell, the or e...	08/05/2010
20100170743	HIGH-PERFORMANCE MUFFLER ASSEMBLY WITH MULTIPLE MODES OF OPERATION A high-performance muffler assembly for exhaust system of an internal combustion engine. The muffler assembly comprises an elongated casing having an inlet port and an exit port, a first pipe disposed within the casing and having an inlet end in fluid communication with...	07/08/2010
20070045042	SOUND REDUCTION SYSTEM WITH SOUND REDUCTION CHAMBER A sound reduction system is provided. The system is preferably designed to allow air or other fluid to flow through the system while lessening the amount of sound flowing through the system. ...	03/01/2007
20070029134	Dual-neck plane wave resonator A resonator and method of designing a resonator including a cavity having an effective length that exceeds λ/8 such that a standing wave having an anti-node will form in the cavity. First and second necks each having first ends are attached to and in fluid communicatio...	02/08/2007
20070023230	Variable resonator A communicating pipe is disposed on an outer periphery of an air intake pipe, and a conduit is formed so as to be parallel to an air intake passage. A plurality of first communicating apertures are disposed through the air intake pipe so as to be arranged in a single ro...	02/01/2007
20060086564	Dual chamber variable geometry resonator A resonator for attenuating pressure pulses is provided. The resonator includes a housing, a divider, a first neck, and a second neck. Walls of the housing form a cavity with a first and second opening. The divider is located in the cavity and cooperates with the housin...	04/27/2006
20060065479	Resonator A resonator is arranged in an intake system including a pipe section for partitioning an intake port from an intake passage that communicates the intake port with a combustion chamber of an engine, the resonator including: a branch pipe having one end branching to the p...	03/30/2006
20060065478	Compressor sound suppression A compressor includes a housing and one or more working elements. A muffler is located downstream of the discharge plenum and a helmholtz resonator is located in the discharge plenum upstream of the muffler. ...	03/30/2006
20060060419	Apparatus for transmitting sound in a motor vehicle An apparatus for transmitting sound in a motor vehicle including a housing (1) with an inside partition (2), which together define or delimit two separate subspaces (3, 4), which in turn are separated by a transmission valve (6) which opens t...	03/23/2006
20060042873	Apparatus for transmitting sound in a motor vehicle An apparatus for transmitting sound in a motor vehicle having a housing (1) with an inner partition (2), which together define two separate subspaces (3, 4). A transmission valve (6) which separates the two subspaces (3, 4) is provided...	03/02/2006
20060032700	Noise reduction technique for snowmobiles An air intake that reduces the transmission of noise from an internal combustion engine while maintaining high air intake flow rates. The air intake has a duct for delivering air to an internal combustion engine, and resonator volumes in communication with the inside of...	02/16/2006
20060032699	Resonator for vehicle A resonator for a vehicle includes a first part and a second part joined to each other, to form a tank-like structure. A neck part is projectedly formed on the first and second parts to communicate the inside and outside of the resonator with each other. A rubber seal m...	02/16/2006
20050279569	Interference-based exhaust noise attenuation An interference-based exhaust noise attenuation device and method for exhaust flow from an internal combustion engine that generates compressive waves in the exhaust flow. The device includes at least a direct path for the exhaust flow; a looped path for the exhaust flo...	12/22/2005
20050217930	Systems and methods for controlling acoustical damping A control system (10) controls a variable acoustical damping device (20) disposed in a sound producing channel (5) of a vehicle engine (1). The control system includes a controller (12) and a selection device (14). The controlle...	10/06/2005
20050199439	Variable geometry resonator for acoustic control The present invention provides a resonator for attenuating acoustic vibration from an air intake passage. The resonator includes a neck, a resonator chamber, a piston-type member, and an actuator. The neck is attached between the air passage and the resonator chamber. T...	09/15/2005
20050194207	Apparatus and method of sound attenuation in a system employing a VSD and a quarter-wave resonator A resonator in a closed fluid system includes a body having a passageway in communication with a closed fluid system wherein a piston is movable within the passageway. Each position of the piston within the passageway defines a noise attenuation frequency corresponding ...	09/08/2005
20050173186	Air intake apparatus An air intake apparatus has an air intake port opening outside, and an air intake path communicating the air intake port with a combustion chamber of an engine. For suppressing noise getting out from the air intake port, with respect to walls partitioning the air intake...	08/11/2005
20050150718	Resonator with retention ribs A resonator includes an inner perforated tube, an outer shell, and a plurality of annular ribs extending radially therebetween and defining resonant chambers. Progressive stepping of ribs and grooves enables axial insertion assembly with minimal cost. The need for weldi...	07/14/2005
20050133300	Device for establishing noise in a motor vehicle In a device for establishing noise in a motor vehicle with a housing, which is divided by at least one sound transmission device into at least two spaces, of which one space is in connection via an inlet line with a gas-carrying part of an internal combustion engine of ...	06/23/2005
20050121255	Device for establishing noise in a motor vehicle In a device for establishing noise in a motor vehicle, comprising a housing which is divided by a sound transmission device into at least two spaces, of which one space is in communication with a gas-carrying part of an internal combustion engine arranged in the motor v...	06/09/2005
20050011699	Muffler A muffler which reduces noises of a wide frequency band with a simple structure. Sound waves of an intake duct enter into and are received in a resonance box via a branch pipe. At the branch pipe, a movable body slidingly abuts a peripheral portion of an opening of a cu...	01/20/2005

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Class 181/276 - Side branch