Patent US3147068A successfully refreshed from Google Patents.
US3147068A
Expired / Lapsed
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Closure apparatus for pressure chamber
Assignee: Wilmot Castle Co
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Filing: 1962-03-01
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Granted: 1964-09-01
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Expires: 1982-03-01
Abstract
No abstract record available.
Inventors
- 👤 Richard D Castle
- 👤 Papalia Sam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:04
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/26; F; F16; F16J; F16J10/00; F16J10/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IMPROVED APPARATUS FOR COMBINATION WITH A VESSEL DEFINING A PRESSURE CHAMBER HAVING AN OPENING, SAID IMPROVEMENT COMPRISING: (A) A DOOR MEMBER SUPPORTED OUTSIDE OF SAID CHAMBER FOR CLOSING AND SEALING SAID OPENING; (B) DOOR LOCKING MEANS INSIDE SAID CHAMBER INCLUDING A LOCKING PLATE INSIDE SAID CHAMBER WHICH IS CONNECTED TO SAID DOOR, SAID LOCKING PLATE BEING CONSTRUCTED SO AS TO BE RESPONSIVE TO A GREATER TOTAL INTERNAL CHAMBER PRESSURE THAN THE TOTAL INTERNAL CHAMBER PRESSURE ON SAID CLOSURE PLATE IN AN OPPOSITE DIRECTION FOR MAINTAINING SAID DOOR IN A CLOSED POSITION.
Claim 2
Dependent Claim
91 words
IMPROVED APPARATUS FOR COMBINATION WITH A VESSEL DEFINING A PRESSURE CHAMBER HAVING AN OPENING, SAID IMPROVEMENT COMPRISING: (A) A DOOR MEMBER SUPPORTED OUTSIDE OF SAID CHAMBER FOR CLOSING AND SEALING SAID OPENING; (B) DOOR LOCKING MEANS INSIDE SAID CHAMBER INCLUDING A LOCKING PLATE INSIDE SAID CHAMBER WHICH IS CONNECTED TO SAID DOOR, SAID LOCKING PLATE BEING CONSTRUCTED SO AS TO BE RESPONSIVE TO A GREATER TOTAL INTERNAL CHAMBER PRESSURE THAN THE TOTAL INTERNAL CHAMBER PRESSURE ON SAID CLOSURE PLATE IN AN OPPOSITE DIRECTION FOR MAINTAINING SAID DOOR IN A CLOSED POSITION.
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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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |