Apparatus are provided for an access system for a passage defined in a component. The passage is surrounded by a flange, and the access system comprises a plug adapted to be coupled to the flange of the component to seal the passage. The plug includes a sidewall and an overhang coupled to the sidewa
Apparatus are provided for an access system for a passage defined in a component. The passage is surrounded by a flange, and the access system comprises a plug adapted to be coupled to the flange of the component to seal the passage. The plug includes a sidewall and an overhang coupled to the sidewall. The overhang is configured to substantially surround at least a portion of the flange and the plug is movable between a first, unsealed position and a second, sealed position upon the application of a force.
대표청구항▼
1. An access system for a passage defined in a component, the passage surrounded by a flange, the access system comprising: a plug adapted to be coupled to the flange of the component to seal the passage, the plug including a sidewall and an overhang coupled to the sidewall, the overhang configured
1. An access system for a passage defined in a component, the passage surrounded by a flange, the access system comprising: a plug adapted to be coupled to the flange of the component to seal the passage, the plug including a sidewall and an overhang coupled to the sidewall, the overhang configured to substantially surround at least a portion of the flange, the plug movable between a first, unsealed position and a second, sealed position upon the application of a force,wherein the force is a vacuum. 2. The access system of claim 1, wherein the plug includes a base, and the sidewall extends radially outward from the base. 3. The access system of claim 1, wherein the plug is substantially conical. 4. The access system of claim 3, wherein the sidewall of the plug defines an opening and at least one stiffening rib spans the opening. 5. The access system of claim 1, wherein the sidewall defines at least one bore, and the access system further comprises at least one fastener received in the bore, the at least one fastener configured to couple the plug to the flange. 6. The access system of claim 1, wherein the sidewall includes a first end and a second end, and the second end is offset from the first end. 7. The access system of claim 1, wherein at least one channel is defined in the sidewall and the access system further comprises a seal received within the channel. 8. The access system of claim 1, wherein the component is a duct associated with an auxiliary power unit. 9. A duct, comprising: a body defining a passage and a flange, the flange extending substantially about a perimeter of the passage and defining a first bore;an access system for sealing the passage, the access system including: a plug coupled to the flange for sealing the passage, the plug including a base and a sidewall, the sidewall defining a second bore; anda fastener received within the first bore and the second bore to couple the plug to the flange,wherein the plug is movable between a first, unsealed position and a second, sealed position upon the application of a force to seal the passage, and the plug further comprises an overhang coupled to the base so as to extend substantially about a perimeter of the flange. 10. The duct of claim 9, wherein the flange extends outwardly from the body at an angle, and the sidewall extends from the base at about the angle. 11. The duct of claim 9, wherein the plug is asymmetric relative to an axis defined through the passage. 12. The duct of claim 9, wherein the sidewall defines a channel and a seal is received within the channel and contacts the flange. 13. The duct of claim 9, wherein the force is a vacuum. 14. The duct of claim 13, wherein the duct is a portion of an inlet duct associated with an auxiliary power unit of a vehicle, and the auxiliary power unit is the source of the vacuum. 15. A duct, comprising: a body defining a passage and a flange, the flange extending outwardly from the body about a circumference of the passage;an access system for sealing the passage, the access system including: a plug coupled to the flange for sealing the passage, the plug including a sidewall that extends radially outward from a base, with the base received at least partially within the passage and an overhang coupled to the sidewall to extend about a perimeter of the flange,wherein the plug is movable between a first, unsealed position and a second, sealed position upon the application of a force to seal the passage, and the sidewall defines a channel and a seal is received within the channel and contacts the flange. 16. The duct of claim 15, wherein the force is a vacuum. 17. The duct of claim 15, wherein the flange defines a first bore, the sidewall of the plug defines a second bore, and the access system further comprises a fastener received in the first bore and the second bore to couple the plug to the flange.
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