US3246902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for sealing and immobilizing a rotatable shaft
Assignee: Pfaudler Inc
•
Filing: 1962-09-14
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Granted: 1966-04-19
•
Expires: 1982-09-14
Abstract
No abstract record available.
Inventors
- 👤 Edward S Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:50
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/46; F16J15/002; F16J15/008; Y; Y10; Y10S; Y10S277/00; Y10S277/929
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IMPROVED SEALED SHAFT CONSTRUCTION FOR USE WITH A FLUID CONTAINING VESSEL HAVING AN OPENING THEREIN, COMPRISING, IN COMBINATION: (A) A FIRST SHAFT HAVING A FIRST UNSUPORTED END EXTENDING SUBSTANTIALLY VERTICALLY THROUGH SAID OPENING INTO THE VESSEL, (B) A SECOND SUBSTANTIALLY VERTICALLY DISPOSED ROTATABLE SHAFT DETACHABLY FASTENED TO A SECOND END OF SAID FIRST SHAFT, (C) FIRST MAIN NORMALLY OPERATIVE SEALING MEANS SURROUNDING ONE OF SAID SHAFTS FOR SEALING SAID VESSEL BETWEEN THE EDGES OF SAID OPENING AND ONE OF SAID SHAFTS, AND (D) DEFORMABLE AUXILIARY NORMALLY OPERATIVE SEALING MEANS ACTUATABLE BY FLUID PRESSURE FROM OUTSIDE SAID VESSEL AND LOCATED IN THE OPENING OF SAID VESSEL INBOARD OF SAID FIRST SEALING MEANS FOR IMMOBILIZING AND SEALING SAID FIRST SHAFT AGAINST AXIAL MOVEMENT WHILE IN ITS ROTATABLE POSITION.
Claim 2
Dependent Claim
126 words
IMPROVED SEALED SHAFT CONSTRUCTION FOR USE WITH A FLUID CONTAINING VESSEL HAVING AN OPENING THEREIN, COMPRISING, IN COMBINATION: (A) A FIRST SHAFT HAVING A FIRST UNSUPORTED END EXTENDING SUBSTANTIALLY VERTICALLY THROUGH SAID OPENING INTO THE VESSEL, (B) A SECOND SUBSTANTIALLY VERTICALLY DISPOSED ROTATABLE SHAFT DETACHABLY FASTENED TO A SECOND END OF SAID FIRST SHAFT, (C) FIRST MAIN NORMALLY OPERATIVE SEALING MEANS SURROUNDING ONE OF SAID SHAFTS FOR SEALING SAID VESSEL BETWEEN THE EDGES OF SAID OPENING AND ONE OF SAID SHAFTS, AND (D) DEFORMABLE AUXILIARY NORMALLY OPERATIVE SEALING MEANS ACTUATABLE BY FLUID PRESSURE FROM OUTSIDE SAID VESSEL AND LOCATED IN THE OPENING OF SAID VESSEL INBOARD OF SAID FIRST SEALING MEANS FOR IMMOBILIZING AND SEALING SAID FIRST SHAFT AGAINST AXIAL MOVEMENT WHILE IN ITS ROTATABLE 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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |