Available Technology

Exhaust blockage system for engine shut down

A flow blocking device is lowered by cable from a helicopter for insertion into the exhaust gas stack of a fuel burning combustion engine propelling a marine vessel under full engine speed. The wall of the exhaust stack are engaged upon entry of the flow blocking device to insure its retention within the exhaust stack and to initiate in sequence ejection of cooling water into the outflow of the exhaust gas followed by pressurized gas expansion of a flexible hose portion of the flow blocking device into sealing contact with the walls of the exhaust stack to stop exhaust gas outflow and cause back pressure build up to a high engine shut down level.
Inventors: 

John W. Johnston, Vincent J. Castelli, David B. Coakley

Patent Number: 
US6401590
Patent Issue Date: 
July 11, 2002
Lab Representatives
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