Outboard engine with acoustic seals installed in motor housing opening
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 16, 2002
Grant Date -
N/A
app pub date -
May 15, 2000
filing date -
May 15, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The escape of acoustic energy via an opening in a motor housing penetrated by a steering arm is reduced by installing a pair of acoustic seals. The seals have respective membranes which extend across respective portions of the opening in the housing. These membranes are flexible, self-supporting and substantially block the transmission therethrough of acoustic wave energy in the range of 1,000 to 3,000 hertz. The acoustic seals installed in the housing opening, in combination with a vibro-acoustic treatment applied on the inner surface of the motor housing, suppress noise produced by the motor.
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