Muffler with acoustic absorption insert for limited clearance pneumatic device applications

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein at least a portion of the housing tapers in width to the downstream end and the housing has a maximum exterior width of less than 38 mm;
• a base secured to the housing at the upstream end, the base including an inlet tube for directing airflow and sound waves from the exhaust port into the housing;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves.

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein at least a portion of the housing tapers in width to the downstream end;
• a base secured to the housing at the upstream end, the base including an inlet tube for directing airflow and sound waves from the exhaust port into the housing;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves;
• wherein the housing and the base combine to define an extension length upon assembly to an exhaust port, the extension length being less than approximately 38 mm.

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein the housing includes a side wall extending between the upstream end and the downstream end, the side wall forming a continuous barrier to sound waves from an interior of the housing and at least a portion of the housing tapers in width to the downstream end;
• a base secured to the housing at the upstream end, the base including an inlet tube for directing airflow and sound waves from the exhaust port into the housing;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves.

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein at least a portion of the housing tapers in width to the downstream end and the housing includes a side wall extending between the upstream end and the downstream end, the side wall forming a continuous barrier to sound waves from an interior of the housing and wherein a portion of the side wall has a thickness in the range of approximately 0.76-2.3 mm;
• a base secured to the housing at the upstream end, the base including an inlet tube for directing airflow and sound waves from the exhaust port into the housing;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves.

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein at least a portion of the housing tapers in width to the downstream end and the housing includes a side wall extending between the upstream end and the downstream end, the side wall forming a continuous barrier to sound waves from an interior of the housing and wherein the side wall defines a diameter of the housing, at least a portion of the side wall tapering in diameter from the upstream end to the downstream end, and further wherein the side wall taper forms an included angle in the range of approximately 30°-50°;
• a base secured to the housing at the upstream end, the base including an inlet tube for directing airflow and sound waves from the exhaust port into the housing;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves.

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein at least a portion of the housing tapers in width to the downstream end and the housing includes a side wall extending between the upstream end and the downstream end, the side wall forming a continuous barrier to sound waves from an interior of the housing and wherein the side wall defines a first section extending from the upstream end and a second section extending from the first section to the downstream end;
• a base secured to the housing at the upstream end, the base including an inlet tube for directing airflow and sound waves from the exhaust port into the housing;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves;
• and
• wherein the first section is substantially cylindrical and the second section is substantially frusto-conical, tapering in diameter to the downstream end and the first section is configured to receive the base.

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein at least a portion of the housing tapers in width to the downstream end;
• a base secured to the housing at the upstream end, the base including an inlet tube for directing airflow and sound waves from the exhaust port into the housing and wherein the base further includes an inlet wall extending in a generally radial fashion from the tube and an annular flange extending from the inlet wall opposite the tube;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves.

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein at least a portion of the housing tapers in width to the downstream end;
• a base secured to the housing at the upstream end, the base including an inlet tube for directing airflow and sound waves from the exhaust port into the housing and wherein the base forms at least one passage apart from the tube for allowing airflow outwardly from the housing;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves.

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein at least a portion of the housing tapers in width to the downstream end;
• a base secured to the housing at the upstream end, the base including an inlet tube for directing airflow and sound waves from the exhaust port into the housing and wherein the tube defines an inlet end and an outlet end, and further wherein upon final assembly, the outlet end is positioned within an interior of the housing;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves.

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein at least a portion of the housing tapers in width to the downstream end;
• a base secured to the housing at the upstream end, the base including an inlet tube for directing airflow and sound waves from the exhaust port into the housing;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves, wherein the fibers have a fineness in the range of approximately 5-50 denier.

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein at least a portion of the housing tapers in width to the downstream end;
• a base secured to the housing at the upstream end, the base including an inlet tube for directing airflow and sound waves from the exhaust port into the housing;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves, wherein the fibers comprise polyester and the acoustic absorption insert has a volume in the range of approximately 8×103-33×103 mm3 and a mass in the range of approximately 0.25-1.0 gram.

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein the housing has a maximum exterior width less than approximately 38 mm;
• a base secured to the housing at the upstream end, the base including a tube for directing airflow and sound waves from an exhaust port into the housing;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves.

A muffler for attenuating noise produced at an exhaust port of a pneumatic device, the muffler comprising:

• a housing defining an upstream end and a downstream end, the downstream end being closed, wherein the housing tapers from a maximum exterior width of less than 38 mm at the upstream end to the downstream end;
• a base secured to the housing at the upstream end, the base including a tube for directing airflow and sound waves from an exhaust port into the housing;
• and
• an acoustic absorption insert disposed within the housing, the insert including a web of fibers configured to absorb sound waves.