US3121384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast protection valve for underground installation
Assignee: Individual
•
Filing: 1962-05-03
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Granted: 1964-02-18
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Expires: 1982-05-03
Abstract
No abstract record available.
Inventors
- 👤 Harold L Brode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:40
CPC Classifications
A; A62; A62B; A62B13/00; Y; Y10; Y10S; Y10S454/00; Y10S454/902; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A BLAST ACTIVATED DEVICE FOR THE PROTECTION OF UNDERGROUND INSTALLATIONS FROM BLAST FORCES ARISING ABOVE GROUND SAID DEVICE PROVIDING VENTILATION AND ACESS WHEN BLAST FORCES ARE ABSENT OR ABATING, SAID DEVICE COMPRISING WALLS DEFINING A HORIZONTALLY UNDERGROUND CHAMBER AND A VERTICALLY POSITIONED CHAMBER OPEING TO GROUND SURFACE, THE LOWER END OF SAID VERTICAL CHAMBER COMMUNICATING WITH SAID HORIZONTALLY DISPOSED CHAMBER MIDWAY ITS EXTENT, ONE END OF SAID HORIZONTALLY DISPOSED CHAMBER COMPRISING A DELAY CHAMBER, A VALVE FOR CLOSING SAID CHAMBER, AND AN ACESS CONDUIT OPENING THROUGH SAID VALVE TO SAID UNDERGROUND INSTALLATION, MEANS FOR CLOSING SAID VALVE, AND THEREBY CLOSING SAID ACESS CONDUIT DIRECTLY BY SHOCK IMPACT FROM SHOCK BLAST ORIGINATING ABOVE GROUND, SAID MEANS COMPRISING A FLEXIBLE HOLLOW TUBLAR MEMBER DISPOSED IN SAID VALVE CHAMBER INSERTABLE IN SAID HORIZONTALLY DISPOSED UNDERGROND CHAMBER AND SECURED AT THE PERIPHERY OF ONE END THEREOF TO THE INTERIOR SURFACE OF THE WALL OF SAID CONDUIT IN AIR SEALED RELATIONSHIP AND IN
Claim 2
Dependent Claim
158 words
A BLAST ACTIVATED DEVICE FOR THE PROTECTION OF UNDERGROUND INSTALLATIONS FROM BLAST FORCES ARISING ABOVE GROUND SAID DEVICE PROVIDING VENTILATION AND ACESS WHEN BLAST FORCES ARE ABSENT OR ABATING, SAID DEVICE COMPRISING WALLS DEFINING A HORIZONTALLY UNDERGROUND CHAMBER AND A VERTICALLY POSITIONED CHAMBER OPEING TO GROUND SURFACE, THE LOWER END OF SAID VERTICAL CHAMBER COMMUNICATING WITH SAID HORIZONTALLY DISPOSED CHAMBER MIDWAY ITS EXTENT, ONE END OF SAID HORIZONTALLY DISPOSED CHAMBER COMPRISING A DELAY CHAMBER, A VALVE FOR CLOSING SAID CHAMBER, AND AN ACESS CONDUIT OPENING THROUGH SAID VALVE TO SAID UNDERGROUND INSTALLATION, MEANS FOR CLOSING SAID VALVE, AND THEREBY CLOSING SAID ACESS CONDUIT DIRECTLY BY SHOCK IMPACT FROM SHOCK BLAST ORIGINATING ABOVE GROUND, SAID MEANS COMPRISING A FLEXIBLE HOLLOW TUBLAR MEMBER DISPOSED IN SAID VALVE CHAMBER INSERTABLE IN SAID HORIZONTALLY DISPOSED UNDERGROND CHAMBER AND SECURED AT THE PERIPHERY OF ONE END THEREOF TO THE INTERIOR SURFACE OF THE WALL OF SAID CONDUIT IN AIR SEALED RELATIONSHIP AND IN
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |