Silencer

Patent metadata

Field	Value
Publication number	US-9695718-B2
Application number	US-201515307168-A
Country	US
Kind code	B2
Filing date	Mar 5, 2015
Priority date	Apr 28, 2014
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A silencer comprises a casing, an inlet pipe for introducing an exhaust into the casing, and an outlet pipe for discharging the exhaust out of the casing. A lid is provided at an exhaust inflow side opening of the outlet pipe and arranged to close the exhaust inflow side opening. The lid has an exhaust inlet for flowing the exhaust into the outlet pipe, a valve body for opening and closing the exhaust inlet, and at least one communication hole formed separately from the exhaust inlet. The valve body is configured to be rotationally movable about a rotation axis of the valve body inside the outlet pipe. The at least one communication hole is provided closer to the rotation axis of the valve body than the exhaust inlet.

First claim

The invention claimed is:

1. A silencer comprising:
a casing;
an inlet pipe for introducing an exhaust into the casing; and
an outlet pipe for discharging the exhaust out of the casing,
a lid being provided at an exhaust inflow side opening of the outlet pipe, and arranged to close the exhaust inflow side opening,
the lid comprising an exhaust inlet for flowing the exhaust into the outlet pipe, a valve body for opening and closing the exhaust inlet, and at least one communication hole formed separately from the exhaust inlet,
the valve body being configured to be rotationally movable about a rotation axis of the valve body inside the outlet pipe, and
the at least one communication hole being provided closer to the rotation axis of the valve body than the exhaust inlet.

2. The silencer according to claim 1 , wherein an exhaust inflow side end of the outlet pipe includes a large diameter part which has a larger diameter than a remainder of the outlet pipe.

3. The silencer according to claim 2 , wherein the large diameter part of the outlet pipe includes an enlarged diameter part which increases in diameter as the enlarged diameter part is closer to the exhaust inflow side opening.

Assignees

• Futaba Ind Co Ltd

Inventors

• Kajikawa Masahiro
• Yoshizawa Kenji

Classifications

• F01N1/08

  by reducing exhaust energy by throttling or whirling · CPC title

• G10K11/161

  in systems with fluid flow (G10K11/162 takes precedence; gas flow silencers or exhaust apparatus for machines or engines in general or for internal combustion engine F01N, noise absorbers in pipes or pipe systems F16L55/02; noise absorption in air conditioning and ventilation F24F13/24; silencing exhaust or propulsion jets in aircraft B64D33/06) · CPC title

• F01N1/083 Primary

  using transversal baffles defining a tortuous path for the exhaust gases or successively throttling exhaust gas flow · CPC title

• F01N13/08

  Other arrangements or adaptations of exhaust conduits {(pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005)} · CPC title

• F01N1/023

  Helmholtz resonators · CPC title