US4177353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
RFI shielded doors with inflatable gaskets
Assignee: United States Department of the Army
•
Filing: 1977-03-18
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Granted: 1979-12-04
•
Expires: 1997-03-18
Abstract
Abstract A gasket structure for the door frame of an electromagnetically shielded enclosure having a flexible inflatable tube with a sleeve or coating of conducting material which upon inflation with the door closed provides intimate electrical contact between the door and the door frame.
Inventors
- 👤 Ray G. McCormack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:07
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0015; F; F16; F16J; F16J15/00; F16J15/46; Y; Y10; Y10S; Y10S277/00; Y10S277/919; Y10S277/92; Y10S277/921
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
In combination, a shielded enclosure having a cooperating door and door frame; and a gasket structure, comprising: a flexible inflatable tube made from an electrically conductive elastomeric material and fixedly mounted about the entire periphery of the door frame such that it is between the door and the door frame when the door is closed; and means for inflating said tube thereby causing said tube to make continuous electrical contact with both the door and the door frame when the door is closed.
Claim 2
Dependent Claim
83 words
In combination, a shielded enclosure having a cooperating door and door frame; and a gasket structure, comprising: a flexible inflatable tube made from an electrically conductive elastomeric material and fixedly mounted about the entire periphery of the door frame such that it is between the door and the door frame when the door is closed; and means for inflating said tube thereby causing said tube to make continuous electrical contact with both the door and the door frame when the door is closed.
Claim 3
Dependent Claim
20 words
A gasket for a shielded enclosure door structure, comprising a flexible inflatable tube made from an electrically conductive elastomeric material.
Claim 4
Dependent Claim
20 words
A gasket for a shielded enclosure door structure, comprising a flexible inflatable tube made from an electrically conductive elastomeric material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |