Differential valve, specifically a cabin air discharge valve in an aircraft, and method for regulating cabin pressure
AssigneeNord-Micro Elektronik Feinmechanik AG
InventorsMartin Steinert, Daniel Rumplik
Life of this patent
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Abstract
Disclosed is a differential valve specifically a cabin air discharge valve for use in the cabin pressure regulating system of an airplane. The valve has two valve stages for closing a valve port including a smaller first stage and a larger second stage. The first and second stages are connected to a common drive gear mechanism that actuates the smaller first valve stage separately and prior to actuating the larger second valve stage. Also disclosed is a method for regulating cabin pressure by means of the differential valve.
Claims18
A multistage valve, more particularly a cabin air exhaust valve in an aircraft comprising a smaller first valve stage (20;
- 60;
- 100) and a larger second valve stage (30;
- 70;
- 110) arranged in a valve port (11;
- 15;
- 31) and a drive mechanism (40;
- 90), said first valve stage (20;
- 60;
- 100) and said second valve stage (30;
- 70;
- 110) being operatively connected to said drive mechanism (40;
- 90) and said drive mechanism (40;
- 90) being constructed and arranged to actuate and always open said first valve stage (20;
- 60;
- 100) prior to and separately from the subsequent actuation and opening of said second valve stage (30;
- 70;
- 110).
A method for cabin pressurization in an aircraft, more particularly in an airplane comprising the following steps:
- a) providing a multistage valve (10;
- 50;
- 80) having a smaller first valve stage (20;
- 60;
- 100) and a larger second valve stage (30;
- 70;
- 110) arranged in a common valve port (11;
- 51;
- 81) and connected to a common drive mechanism (40;
- 90) for opening said valve stages separately with the first smaller stage opening prior to the second larger stage;
- b) operating the drive mechanism (40;
- 90) for actuating and opening the smaller first valve stage for partially opening the valve port (11;
- 51;
- 81) to pressurize the cabin during flight at a high differential pressure;
- and
- c) operating the drive mechanism (40;
- 90) for actuating and opening the larger second valve stage (30;
- 70;
- 110) after opening the smaller first valve stage and in addition to the opening of the smaller first valve stage for fully opening the valve port during flight at a low differential pressure.
Dependencies are inferred from the claim text.