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US 5,238,220 AGranted
Manually and electrically controlled butterfly valve
AssigneeThe Boeing Company
InventorsSidney D. Shell, Dung T. Vu
Life of this patent
Estimating the term…
Abstract
A butterfly valve is utilized to control air flow in the environmental control air distribution system of an aircraft. A linkage system enables the valve to be manually controlled under normal conditions but to be shut off remotely in case of an emergency condition.
Claims4
An air distribution system comprising:
- a duct to distribute air flow;
- a duct mounted butterfly valve for controlling air flow through said duct;
- cable means releasably connected to a locking mechanism that retains said cable means in operative condition for manual adjustment of the position of said butterfly valve by an operator, said locking mechanism pivotably connected to said butterfly valve and coupled to spring means;
- and
- an electrical solenoid having a pin for releasing said locking mechanism from said cable means upon occurrence of a predetermined condition thereby permitting at least one of spring means and air flow in said duct to close said butterfly valve, wherein said locking mechanism permits direct physical separation of said cable means from said locking mechanism and said butterfly valve thereby terminating any manual control by said operator of said butterfly valve.
2 more elements
An air distribution system comprising:
- a duct to distribute air flow;
- a duct mounted butterfly valve for controlling air flow through said duct;
- a locking mechanism pivotably connected to said butterfly valve;
- manual controlling means releasably connected to said locking mechanism, said manual controlling means retained by said locking mechanism in operative condition for manual adjustment of the position of said butterfly valve by an operator;
- spring means coupled to said locking mechanism, said spring means biased in one direction when said locking mechanism is in said operative condition;
- and
- an electrical solenoid having a pin for releasing said locking mechanism from said manual controlling means, thereby terminating any manual control of said butterfly valve by said operator and permitting said at least one of spring means and air flow in said duct to close said butterfly valve, wherein said locking mechanism permits direct physical separation of said manual controlling means from said locking mechanism and said butterfly valve.
4 more elements
Dependencies are inferred from the claim text.