Flapper configuration for marine exhaust system

Details Flapper configuration for marine exhaust system Flapper configuration for marine exhaust system

2011-03-29

2011-03-29

Enad, Elvin G (Department: 2832)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S237000, C181S254000

Reexamination Certificate

active

07913809

ABSTRACT:
Disclosed are apparatus and methodology for reducing noise and wear in a flapper configured exhaust tip for a marine exhaust system. A flapper, normally located within an exhaust tip of a marine exhaust system, is relocated upstream of the point in the exhaust system where cooling water normally contacts the exhaust pipe. An exhaust tip is coupled to the upstream portion of the exhaust system by way of an elastomeric coupling device. The flapper is positioned such that a tip thereof contacts the elastomeric coupling rather than the metallic exhaust pipe. Such contact with an elastomeric coupling device reduces noise previously produced by flapper contact with the hot exhaust pipe occasioned by destruction and/or heat degeneration of elastomeric material generally associated with the flapper device.

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