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| Number | Title | Issue Date |
| 4167987 | Multiple flow marine muffler constructed of resilient material A multiple flow marine muffler constructed of resilient material having an elongated generally cylindrical hollow shell with reduced diameter inlet and outlet portions, and longitudinally spaced pairs of opposed baffles within the shell which define a plu... | 09/18/1979 |
| 4164989 | Muffler, especially for portable internal combustion engine A muffler, especially for a portable internal combustion engine, particularly for driving a motor chain saw, which muffler comprises an exhaust gas receiving chamber which is defined by a chamber wall and by a pan-shaped housing wall including an inlet fo... | 08/21/1979 |
| 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 |
| 4143739 | Concentric pass-type muffler construction An improved concentric pass-type muffler construction. The muffler includes an outer generally cylindrical casing enclosed by a pair of end heads, and an inlet tube, connected to the exhaust pipe of an engine, is mounted axially on one head, while an outl... | 03/13/1979 |
| 4142607 | Silencer, especially for portable motor chain saws Disclosed is an exhaust silencer suitable for use with portable combustion engines, and particularly for use with chain saw engines, comprising a chamber having an inlet and outlet for receiving the engine exhaust; means disposed about the chamber outlet ... | 03/06/1979 |
| 4142606 | Exhaust gas diffuser A system for diffusing exhaust gases and controlling and suppressing backfire in an industrial truck is disclosed. Exhaust gases from the truck engine are first passed through a spark arresting muffler to remove hot, solid particles from the gas stream. T... | 03/06/1979 |
| 4126205 | Automobile exhaust gas muffler construction An automobile exhaust gas muffler construction for flowing exhaust gases, comprises a housing having spaced apart semi-cylindrical end walls interconnected by tangential straight side walls. The housing also includes a front wall having a tubular inlet ex... | 11/21/1978 |
| 4124092 | Muffler for automobiles A muffler for automobiles having a drum-shaped expansion chamber of diameter D and length h, to which gas inlet and outlet pipes and an insert pipe of a Helmholtz resonator open so that the gas flow traverses the expansion chamber substantially diametrica... | 11/07/1978 |
| 4122914 | Muffler Mufflers suitable for use with automobile engines include a main body closed at the forward and rear ends thereof by forward and rear end plates, an inlet pipe leading into the main body through an aperture in the forward end plate and an outlet pipe lead... | 10/31/1978 |
| 4119174 | Engine muffler An engine muffler which includes a chamber divided into two balanced sections, an inlet pipe that extends through a first chamber into the second, and a transfer tube for carrying exhaust gas from the second chamber to the first. A spark arrester at the e... | 10/10/1978 |
| 4116303 | Exhaust muffler Exhaust muffler for sound suppression, particularly designed as an automotive muffler, which comprises a gas inlet tube communicating with a first chamber in an outer, preferably cylindrical, casing, and an exit tube coaxially aligned with the inlet tube ... | 09/26/1978 |
| 4109751 | Noise silencer A noise silencer for an internal combustion engine has a hollow pipe serving as an air intake for the internal combustion engine and having a length L which is an even submultiple of the wavelength at the lowest of a range of noise frequencies from the in... | 08/29/1978 |
| 4109755 | Noise attenuator High temperature resisting cordage is wrapped around an exhaust gas muffler housing and covered with an outer wrap of metal to provide sound and thermal insulation for the muffler.... | 08/29/1978 |
| 4108274 | Acoustical apparatus An apparatus for reducing acoustical pressure in a tubing is disclosed comprising a first molded plastic member having a first support with an orifice extending therethrough and having a first side forming a substantially saucer shaped member. A plurality... | 08/22/1978 |
| 4108276 | Vent silencer A vent silencer including an outer housing having an inlet and an outlet, and a divider plate is disposed within the housing and divides the housing into an upstream inlet chamber and a downstream chamber. Located within the inlet chamber and communicatin... | 08/22/1978 |
| 4105090 | Muffler for exhaust gases A muffler for exhaust gases is constructed with a small casing skirting a portion of an exhaust gas inlet pipe. The end of the casing nearest the exit port of the pipe is blocked and provided with a layer of sound absorbing material. The exhaust gases exi... | 08/08/1978 |
| 4102430 | Peripheral return flow muffler A muffler for attenuating sound in internal combustion engine exhaust systems comprises an inner shell subdivided into an inlet chamber and an outlet chamber, inlet and outlet tubes for the muffler opening into the respective chambers, and an outer shell ... | 07/25/1978 |
| 4093039 | Air intake silencer An air intake silencer includes a box-shaped expansion chamber constructed of identically dimensioned, separable havles respectively connected to a carburetor intake system and a tubular intake member. In a basic form of the silencer, the tubular intake m... | 06/06/1978 |
| 4079810 | Muffler A muffler which does not require a low-frequency Helmholtz resonator includes an outer shell and first and second heads for closing the inlet and outlet ends, respectively, of the shell. First, second and third baffles are disposed internally of the shell... | 03/21/1978 |
| 4079809 | Muffler for pneumatic drill A muffler for a percussive drill is provided consisting of a casing of general prismatic shape adapted for mounting on the drill. An inlet is present in the casing for receiving exhaust from the drill, the drill exhaust port and muffler inlet having the s... | 03/21/1978 |
| 4074975 | Combination exhaust-gas cleaner and muffler for an automobile engine A combination exhaust-gas cleaner and muffler for particular use in an exhaust system of an automotive engine incorporating in the exhaust system a catalytic converter using a granular catalyst which is responsible for emission of dust particles of oxides... | 02/21/1978 |
| 4064962 | Muffler method and apparatus A muffler having a low frequency silencing element therein that can be contained within the spatial limitations of a conventional muffler without increasing the back pressure. The low frequency silencing element includes a plurality of axially extending t... | 12/27/1977 |
| 4011922 | Muffler construction A muffler construction for an internal combustion engine. The muffler includes a housing having an inlet to receive exhaust gases from the engine and having an outlet for the discharge of gases. Located between the inlet and the outlet are a pair of baffl... | 03/15/1977 |
| 4000786 | Marine muffler A reactive type marine muffler which combines principles of both baffled construction and expansion chamber attenuation with a liquid flow path to provide improved sound attenuation over a broad spectrum of octave bands and a substantially lower dB(A). Th... | 01/04/1977 |
| 3989121 | Pulse converting exhaust silencing system A silencing system for the exhaust gas of internal combustion engines or the like, and particularly diesel engines, wherein the system has means to convert high energy exhaust pulses found along the length of the silencing system into more or less standar... | 11/02/1976 |
