ADA compliant shielded door
AssigneeETS-Lindgren, Inc.
InventorBrian Adair Rodgers
Life of this patent
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Abstract
Door sealing systems for providing an RF seal to a door to an enclosure such as an anechoic chamber are disclosed. According to one aspect, a door sealing system includes a door having an outer periphery and a plurality of extendable and retractable knife edges along at least a portion of the outer periphery. The door sealing system includes a door frame having a plurality of channels corresponding to the plurality of knife edges, each knife edge projecting outward in a direction parallel to a face of the door and into the corresponding channels when the door is in a sealed position. Further, the door sealing system may include channels in the door frame along which knife edges of the door frame move.
Claims21
A door sealing system configured to create a radio frequency (RF) seal when a door is sealed so that RF energy is restricting from passing through a gap between the door and a door frame, the door sealing system comprising:
- a door having an outer periphery, and a plurality of first knife edges along at least part of the outer periphery of the door, each of the first knife edges projecting outward into a channel of a door frame in a direction parallel to a face of the door as the door is sealed;
- the door frame surrounding the outer periphery of the door when the door is closed, the door frame having a plurality of channels along the at least part of the outer periphery of the door, each channel of the door frame having walls between which a knife edge is received by the channel;
- contact elements on a side of each knife edge of the plurality of first knife edges, the contact elements on a knife edge of the first knife edges being configured to make electrical contact with a channel wall of a corresponding channel of the door frame when the knife edge of the first knife edges is moved into the corresponding channel, the electrical contact of the contact elements with the channel wall providing an RF-suppressing connection;
- and
- a motive force application system configured to move the plurality of first knife edges into their corresponding channels of the door frame when the door is closed.
A system for sealing a door to create a radio frequency (RF) seal between a door and a door frame, the system comprising:
- a first set of knife edges in the door;
- a first set of channels in a door frame that at least partially surrounds the door when the door is closed, the first set of channels corresponding to the first set of knife edges;
- a motive force application system to cause movement of the first set of knife edges;
- a first set of slave cylinders configured to be responsive to a compressed fluid to move the first set of knife edges of the door into the first set of channels of the door frame, each knife edge of the first set of knife edges being oriented to project into a corresponding channel of the first set of channels, the projecting being in a direction that is parallel to a face of the door;
- and
- a first set of valves configured to regulate a flow of compressed fluid to the first set of slave cylinders;
- and
- a master cylinder configured to be manually activated to provide compressed fluid to the first set of valves to one of seal and unseal the door.
A door sealing system configured to provide a radio frequency (RF) seal, the door sealing system including a door having an outer periphery and a plurality of extendable and retractable first knife edges along at least a portion of the outer periphery, the door sealing system further including a door frame having a plurality of channels corresponding to the plurality of knife first edges, each knife edge of the first knife edges projecting outward in a direction parallel to a face of the door and into the corresponding channels when the door is in a sealed position.
Dependencies are inferred from the claim text.