US3348537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination breathing valve and speaking diaphragm unit
Assignee: MSA Safety Inc
•
Filing: 1965-03-01
•
Granted: 1967-10-24
•
Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 John C Miller
- 👤 Harry N Cotabish
- 👤 Elmer E Buban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:51
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/08; A62B18/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A COMBINATION BREATHING VALVE AND SPEAKING DIAPHRAGM UNIT FOR A BREATHING MASK, SAID UNIT COMPRISING A HOUSING HAVING A SIDE WALL ADAPTED TO BE SEALED IN AN OPENING IN SUCH A MASK, THE HOUSING HAVING A WALL AT ONE END BUT BEING OPENING AT THE OPPOSITE END, A SPEAKING DIAPHRAGM MOUNTED IN THE HOUSING ADJACENT ITS OPEN END AND CLOSING THAT END, SAID END WALL OF THE HOUSING HAVING AN OPENING THERETHROUGH SPACED LENGTHWISE OF THE HOUSING FROM THE DIAPHRAGM, THE DIAPHRAGM OVERLAPPING AT LEAST THE MAJOR PORTION OF THE END WALL OPENING, A VALVE MOUNTED IN SAID WALL OPENING, THE SIDE WALL OF THE HOUSING BEING PROVIDED WITH AN OUTLET PORT BETWEEN SAID VALVE AND DIAPHRAGM, AND A PARTITION WALL IN THE HOUSING SUBSTANTIALLY PARALLEL TO SAID DIAPHRAGM, THE PARTITION WALL BEING LOCATED BETWEEN SAID PORT AND DIAPHRAGM BUT SPACED FROM THE DIAPHRAGM TO FORM A CHAMBER BETWEEN THE DIAPHRAGM AND PARTITION WALL, SAID END WALL BEING PROVIDED WITH A VOICE TRANSMISSION OPENING AT ONE SIDE OF SAID END WALL OPENING, AND THE HOUSING BEING PROVIDED WITH AN INTERNAL PASSAGE CONNECTING SAID VOICE OPENING WITH SAID CHAMBER.
Claim 2
Dependent Claim
188 words
A COMBINATION BREATHING VALVE AND SPEAKING DIAPHRAGM UNIT FOR A BREATHING MASK, SAID UNIT COMPRISING A HOUSING HAVING A SIDE WALL ADAPTED TO BE SEALED IN AN OPENING IN SUCH A MASK, THE HOUSING HAVING A WALL AT ONE END BUT BEING OPENING AT THE OPPOSITE END, A SPEAKING DIAPHRAGM MOUNTED IN THE HOUSING ADJACENT ITS OPEN END AND CLOSING THAT END, SAID END WALL OF THE HOUSING HAVING AN OPENING THERETHROUGH SPACED LENGTHWISE OF THE HOUSING FROM THE DIAPHRAGM, THE DIAPHRAGM OVERLAPPING AT LEAST THE MAJOR PORTION OF THE END WALL OPENING, A VALVE MOUNTED IN SAID WALL OPENING, THE SIDE WALL OF THE HOUSING BEING PROVIDED WITH AN OUTLET PORT BETWEEN SAID VALVE AND DIAPHRAGM, AND A PARTITION WALL IN THE HOUSING SUBSTANTIALLY PARALLEL TO SAID DIAPHRAGM, THE PARTITION WALL BEING LOCATED BETWEEN SAID PORT AND DIAPHRAGM BUT SPACED FROM THE DIAPHRAGM TO FORM A CHAMBER BETWEEN THE DIAPHRAGM AND PARTITION WALL, SAID END WALL BEING PROVIDED WITH A VOICE TRANSMISSION OPENING AT ONE SIDE OF SAID END WALL OPENING, AND THE HOUSING BEING PROVIDED WITH AN INTERNAL PASSAGE CONNECTING SAID VOICE OPENING WITH SAID CHAMBER.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |