Patent US3286460A successfully refreshed from Google Patents.
US3286460A
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Pressure actuating device
Assignee: Dynamit Nobel AG
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Filing: 1964-09-04
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Granted: 1966-11-22
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Expires: 1984-09-04
Abstract
No abstract record available.
Inventors
- 👤 Stadler Hans
- 👤 Gronemann Richard
- 👤 Gawlick Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:37
CPC Classifications
B; B21; B21J; B21J7/00; B21J7/20; B21J7/22; B21J7/24; B21J7/26; B30; B30B; B30B1/00; B30B1/001
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
A POWER OPERATOR, COMPRISING A PRESSURE CYLINDER; A BREECH HEAD CLOSING ONE END OF SAID CYLINDER; A PISTON MEANS FORMING A PLURALITY OF EXPANSION CHAMBERS IN COOPERATION WITH SAID CYLINDER AND BREECH HEAD; A PLURALITY OF PROPELLANT CARTRIDGE CHAMBER MEANS OPENING INTO SAID EXPANSION CHAMBERS FOR THE RECEPTION OF PROPELLANT CARTRIDGES, WITH FIRING COMPONENTS; MEANS FOR FIRING THE PROPELLANT CARTRIDGES, IN A PREDETERMINED ORDER SO THAT THE GAS PRESSURE IN SAID EXPANSION CHAMBERS WILL REMAIN SUBSTANTIALLY CONSTANT DURING THE FIRING STROKE OF SAID PISTON MEANS; SAID PISTON MEANS HAVING AN AXIALLY EXTENDING SUBSTANTIALLY CONCENTRIC RECESS FORMING ONE OF SAID EXPANSION CHAMBERS; AND SAID CARTRIDGE CHAMBER MEANS BEING SYMMETRICALLY ARRANGED.
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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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |