Patent US3148965A successfully refreshed from Google Patents.
US3148965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dip tube for gas-filled cylinder
Assignee: WJ Voit Rubber Corp
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Filing: 1962-07-02
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Granted: 1964-09-15
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Expires: 1982-07-02
Abstract
No abstract record available.
Inventors
- 👤 William F Summerfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:45
CPC Classifications
A; A62; A62B; A62B9/00; F; F17; F17C; F17C13/00; F17C13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A DIP TUBE FOR A GAS-FILLED CYLINDRICAL USED IN UNDERWATER BREATHING APPARATUS, SAID DIP TUBE INCLUDING A HOLLOW TUBE HAVING A CENTRAL DUCT AND AN OUTER END HAVING MEANS FOR FASTENING SAID TUBE TO SAID CYLINDRICAL AND AN INNER END PROJECTING INTO SAID CYLINDER, SAID INNER END AND SAID CENTRAL DUCT TERMINATING IN A FILTER SEAT, A SINTERED METAL FILTER MOUNTED WITHIN SAID SEAT AND A BLOW-BY AND FRANGIBLE SAFETY VALVE BETWEEN SAID INNER AND OUTER ENDS OF SAID TUBE FOR BY-PASSING SAID FILTER WHEN GAS IS PUMPED INTO SAID CYLINDER AND FOR SUPPLYING GAS FROM SAID CYLINDER IN CASE OF FAILURE OF SAID FILTER, SAID BLOW-BY AND SAFETY VALVE COMPRISING A CROSS BORE PIERCING SAID TUBE AND GOING THROUGH SAID CENTRAL DUCT, AND AN ELASTOMERIC BAND STRAPPED AROUND SAID TUBE AND OVER SAID CROSS BORE, SAID BAND BEING PIERCED BY GAS PRESSURE WITHIN SAID CYLINDER SHOULD SAID FILTER FAIL TO PASS GAS FROM SAID CYLINDER INTO SAID TUBE.
Claim 2
Dependent Claim
159 words
A DIP TUBE FOR A GAS-FILLED CYLINDRICAL USED IN UNDERWATER BREATHING APPARATUS, SAID DIP TUBE INCLUDING A HOLLOW TUBE HAVING A CENTRAL DUCT AND AN OUTER END HAVING MEANS FOR FASTENING SAID TUBE TO SAID CYLINDRICAL AND AN INNER END PROJECTING INTO SAID CYLINDER, SAID INNER END AND SAID CENTRAL DUCT TERMINATING IN A FILTER SEAT, A SINTERED METAL FILTER MOUNTED WITHIN SAID SEAT AND A BLOW-BY AND FRANGIBLE SAFETY VALVE BETWEEN SAID INNER AND OUTER ENDS OF SAID TUBE FOR BY-PASSING SAID FILTER WHEN GAS IS PUMPED INTO SAID CYLINDER AND FOR SUPPLYING GAS FROM SAID CYLINDER IN CASE OF FAILURE OF SAID FILTER, SAID BLOW-BY AND SAFETY VALVE COMPRISING A CROSS BORE PIERCING SAID TUBE AND GOING THROUGH SAID CENTRAL DUCT, AND AN ELASTOMERIC BAND STRAPPED AROUND SAID TUBE AND OVER SAID CROSS BORE, SAID BAND BEING PIERCED BY GAS PRESSURE WITHIN SAID CYLINDER SHOULD SAID FILTER FAIL TO PASS GAS FROM SAID CYLINDER INTO SAID TUBE.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |