Muffler

• US 9,453,452 B2
• Filed: 08/28/2013
• Issued: 09/27/2016
• Est. Priority Date: 08/31/2012
• Status: Active Grant

• Current Assignee: Futaba Industrial Company Limited
• Original Assignee: Futaba Industrial Company Limited
• Inventors: Kondo, Seiji, Kajikawa, Masahiro, Sudoh, Masayuki
• Primary Examiner(s): Phillips, Forrest M
• Application Number:
  US14/423,911
• Publication Number:
  US 20150192055A1
• Time in Patent Office: 1,126 Days
• Field of Search: 181/244, 181/245, 181/227, 181/228, 181/212
• US Class Current: 1/1
• CPC Class Codes: F01N 1/084 the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
• CPC Class Codes: F01N 1/168 for controlling or modifying silencing characteristics only
• CPC Class Codes: F01N 13/04 having two or more silencers in parallel, e.g. having interconnections for multi-cylinder engines
• CPC Class Codes: F01N 13/082 of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation F01N13/20 takes precedence
• CPC Class Codes: F01N 2240/22 a condensation chamber
• CPC Class Codes: F01N 2470/02 Tubes being perforated
• CPC Class Codes: F01N 2490/02 Two or more expansion chambers in series connected by means of tubes
• CPC Class Codes: F01N 3/005 for draining or otherwise eliminating condensates or moisture accumulating in the apparatus F01N3/02 takes precedence
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A muffler comprises an outer shell, an outlet pipe, and a restraining mechanism. A restraining mechanism restrains a height of spout of a liquid that flows inside the outlet pipe through a designated vent hole, the designated vent hole is at least one vent hole facing against a bottom surface of the outer shell among the at least one vent hole that the outlet pipe comprises.

Claims

1. A muffler comprising:

an outer shell configured to receive exhaust gases from an internal combustion engine;

an outlet pipe formed into a tubular shape comprising a pair of open end-parts as well as at least one vent hole that passes through an outer surface and an inner surface thereof, wherein one of the pair of open end-parts and the vent hole are arranged inside the outer shell so as to guide the exhaust gases in the outer shell to the atmosphere; and

a restraining mechanism that restrains a height of spout of a liquid that flows inside the outlet pipe through a designated vent hole, the designated vent hole is at least one vent hole facing against a bottom surface of the outer shell among the at least one vent hole the outlet pipe comprises;

wherein the restraining mechanism comprises a cover member; and

wherein the cover member is a member made of an air-permeable material.

2. The muffler according to claim 1, wherein

the cover member is disposed inside the outlet pipe and covers the designated vent hole.

3. The muffler according to claim 2, wherein

the cover member is a pipe that is inserted inside the outlet pipe.

4. The muffler according to claim 2, wherein

the cover member is a member formed into a plate-like shape and disposed inside the outlet pipe.

5. The muffler according to claim 1, wherein

the restraining mechanism comprises a piece member protruding from a surrounding edge of the designated vent hole so as to cover each designated vent hole from outside of the outlet pipe.

6. The muffler according to claim 1, wherein

the cover member is configured to cover the designated vent hole from outside of the outlet pipe.