Patent US3133575A successfully refreshed from Google Patents.
US3133575A
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US
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Pneumatic closure for multicompartment receptacle
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1963-06-19
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Granted: 1964-05-19
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Expires: 1983-06-19
Abstract
No abstract record available.
Inventors
- 👤 Charles O Slemmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:20
CPC Classifications
F; F16; F16J; F16J13/00; F16J13/02; B; B28; B28C; B28C7/00; B28C7/0046; B28C7/0053; B28C7/0076; F16K; F16K7/00; F16K7/10; Y; Y10; Y10T; Y10T292/00; Y10T292/20; Y10T292/205; Y10T292/212
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PNEUMATIC CLOSURE DEVICE FOR A MULTICOMPARTMENT CONCRETE MIX RECEPTACLE WITH AN INNER COMPARTMENT AND AN OUTER COMPARTMENT, COMPRISING A FRAME ASSEMBLY FORMING AN OUTER THROAT FOR ENTRY INTO SAID OUTER COMPARTMENT AND AN INNER THROAT WITHIN SAID OUTER THROAT FOR ENTRY INTO SAID INNER COMPARTMENT; A REMOVABLE CLOSURE PLATE ADAPTED TO CLOSE SAID INNER THROAT AND AN INFLATABLE PNEUMATIC BAG MOUNTED WITHIN SAID OUTER THROAT AND ARRANGED TO EXPAND WITHIN SAID OUTER THROAT WHEN INFLATED TO SEAL SAID OUTER COMPARTMENT AND TO EXPAND RADIALLY INWARDLY AGAINST SAID CLOSURE PLATE TO SEAL SAID INNER COMPARTMENT.
Claim 2
Dependent Claim
95 words
A PNEUMATIC CLOSURE DEVICE FOR A MULTICOMPARTMENT CONCRETE MIX RECEPTACLE WITH AN INNER COMPARTMENT AND AN OUTER COMPARTMENT, COMPRISING A FRAME ASSEMBLY FORMING AN OUTER THROAT FOR ENTRY INTO SAID OUTER COMPARTMENT AND AN INNER THROAT WITHIN SAID OUTER THROAT FOR ENTRY INTO SAID INNER COMPARTMENT; A REMOVABLE CLOSURE PLATE ADAPTED TO CLOSE SAID INNER THROAT AND AN INFLATABLE PNEUMATIC BAG MOUNTED WITHIN SAID OUTER THROAT AND ARRANGED TO EXPAND WITHIN SAID OUTER THROAT WHEN INFLATED TO SEAL SAID OUTER COMPARTMENT AND TO EXPAND RADIALLY INWARDLY AGAINST SAID CLOSURE PLATE TO SEAL SAID INNER COMPARTMENT.
References Cited (Backward Citations)
US1683336A
Cited
US2697534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |