Aerodynamically operated rain cap

Details Aerodynamically operated rain cap Aerodynamically operated rain cap

1985-12-31

1987-06-09

Joyce, Harold

98 73, F23L 1702

Patent

active

046711716

ABSTRACT:
A rain cap or protective cover device for an exhaust stack of an internal combustion engine is disclosed that is movable between a standby protective position and an operating position. In the standby position a pair of rearwardly extending arms cause a fairing of the rain cap to cover an outlet of an exhaust stack to which the rain cap is pivotally connected. In the operating position, winglets connected to the arm interact with air flow past the stack to raise the arms and move the fairing to a conformable position about the exhaust stack. The fairing is shaped to aerodynamically interact with the air flow to establish a low pressure area at the outlet of the exhaust stack.

REFERENCES:
patent: 2396876 (1946-03-01), Olsen
patent: 3446010 (1969-05-01), Hopkins
patent: 3964376 (1976-06-01), Janke
patent: 4059045 (1977-11-01), McClain
patent: 4205706 (1980-06-01), Jasensky
patent: 4495859 (1985-01-01), Janke

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