Adjustable low pressure warning device
AssigneeHoneywell International Inc.
InventorsSwapnil Gopal Patil, Garaga Phani Kumar, Swan Tuffery, Bharat Bhushan Arora
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Abstract
A low pressure warning device that comprises a piston located inside the device, where the piston partitions the device into a first chamber communicating with a first opening and a second chamber communicating with a second opening, an adjustable stop, and a spring located inside the device and configured to bias the piston to a position based on a position of the adjustable stop and based on a pressure differential between the first opening and the second opening, wherein a low pressure differential warning state is associated with a position of the piston.
Claims20
An encapsulated protective suit, comprising
- a skin;
- and
- a low pressure warning device coupled to the skin, comprising
- a piston located inside the device, where the piston partitions the device into a first chamber communicating with a first opening and a second chamber communicating with a second opening;
- an adjustable stop, and
- a spring located inside the device and configured to bias the piston to a position based on a position of the adjustable stop and based on a pressure differential between the first opening and the second opening,
- wherein a pressure differential state is associated with a position of the piston.
A low pressure warning device for use with an encapsulated suit. comprising:
- a piston located inside the device, where the piston partitions the device into a first chamber corrnnunicatmg with a first opening configured for fluid communication with an external environment outside the encapsulated suit, and a second chamber communicating with a second opening configured for fluid communication with an interior of the encapsulated suit;
- an adjustable stop;
- a spring located inside the device and configured to bias the piston to a position based on a position of the adjustable stop and based on a pressure differential between the first opening and the second opening;
- and
- a flow control valve,
- wherein a low pressure differential warning state is associated with a position of the piston,
- wherein the low pressure warning device is operable to indicate a low differential pressure between the encapsulated suit and the external environment, aid
- wherein the flow control valve is operable to adjust fluid flow into the encapsulated suit.
A low pressure warning device, comprising:
- a piston located inside the device where the piston partitions the device into a first chamber communicating with a first opening and a second chamber communicating with a second opening:
- an adjustable stop;
- and
- a spring located inside the device and configured to bias the piston to a position based on a position of the adjustable stop and based on a pressure differential between the first opening and the second opening,
- wherein a low pressure differential warning state is associated with a position of the piston;
- the device further comprising a whistle in communication with the second chamber that is configured to sound when the low pressure warning device experiences a pressure differential that is less than a threshold.
A method of using an encapsulated protective suit, comprising:
- donning an encapsulating protective suit, the suit comprising a skin and a low pressure warning device coupled to the skin, the low pressure warning device comprising a piston located inside the device, Where the piston partitions the device into a first chamber communicating with a first opening and a second chamber communicating with a second opening;
- an adjustable stop, and
- a spring located inside the device and configured to bias the piston to a position based on a position of the adjustable stop and based on a pressure differential between the first opening and the second opening,
- wherein a low pressure differential warning state is associated with a position of the piston;
- after donning the encapsulating protective suit, coupling a breathable air supply line to the suit;
- and
- when the position of the piston in the low pressure warning device indicates a low pressure warning, adjusting an air supply in-flow valve until the piston in the low pressure warning device no longer indicates a low pressure warning.
Dependencies are inferred from the claim text.