US3144957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure apparatus for pressure chamber
Assignee: Wilmot Castle Co
•
Filing: 1962-01-22
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Granted: 1964-08-18
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Expires: 1982-01-22
Abstract
No abstract record available.
Inventors
- 👤 Edgar L Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:41
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/03; F; F16; F16J; F16J13/00; F16J13/16; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0825; Y10T292/0826
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IMPROVED APPARATUS FOR COMBINATION WITH A PRESSURE VESSEL MEMBER HAVING AN OPENING, A DOOR MEMBER ADAPTED FOR CLOSURE OF SAID OPENING, SUPPORT MEANS SUPPORTING SAID DOOR EXTERIORLY OF SAID CHAMBER FOR MOVEMENT BETWEEN OPEN AND CLOSED POSITIONS, SEALING MEANS INTERMEDIATE SAID MEMBERS ADAPTED TO SURROUND THE PERIPHERY OF SAID OPENING, SAID IMPROVEMENT COMPRISING: LOCKING MEANS INTERMEDIATE SAID MEMBERS AUTOMATICALLY MOVABLE BETWEEN LOCKED, AJAR AND UNLOCKED POSITIONS FOR LOCKING AND SEALING SAID MEMBERS TOGETHER WHEN IN SAID LOCKED POSITION, AND SAFETY CONTROL MEANS BETWEEN SAID MEMBERS PERMITTING SAID LOCKING MEANS TO MOVE FROM SAID AJAR POSITION TO SAID UNLOCKED POSITION ONLY IF PRESSURE IN SAID CHAMBER HAS BEEN REDUCED TO A PRESELECTED LEVEL.
Claim 2
Dependent Claim
112 words
IMPROVED APPARATUS FOR COMBINATION WITH A PRESSURE VESSEL MEMBER HAVING AN OPENING, A DOOR MEMBER ADAPTED FOR CLOSURE OF SAID OPENING, SUPPORT MEANS SUPPORTING SAID DOOR EXTERIORLY OF SAID CHAMBER FOR MOVEMENT BETWEEN OPEN AND CLOSED POSITIONS, SEALING MEANS INTERMEDIATE SAID MEMBERS ADAPTED TO SURROUND THE PERIPHERY OF SAID OPENING, SAID IMPROVEMENT COMPRISING: LOCKING MEANS INTERMEDIATE SAID MEMBERS AUTOMATICALLY MOVABLE BETWEEN LOCKED, AJAR AND UNLOCKED POSITIONS FOR LOCKING AND SEALING SAID MEMBERS TOGETHER WHEN IN SAID LOCKED POSITION, AND SAFETY CONTROL MEANS BETWEEN SAID MEMBERS PERMITTING SAID LOCKING MEANS TO MOVE FROM SAID AJAR POSITION TO SAID UNLOCKED POSITION ONLY IF PRESSURE IN SAID CHAMBER HAS BEEN REDUCED TO A PRESELECTED LEVEL.
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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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |