US3272516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressurized seals for the shafts of fans
Assignee: Westinghouse Electric Corp
•
Filing: 1963-12-31
•
Granted: 1966-09-13
•
Expires: 1983-12-31
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:39
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/12; F04D29/122; F16; F16J; F16J15/00; F16J15/16; F16J15/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
207 words
A PRESSURIZED SEAL FOR A SHAFT OF A FAN HAVING A CASING WALL THROUGH WHICH THE SHAFT EXTENDS, COMPRISING A PAIR OF VERTICALLY EXTENDING, SPACED APART PLATES SPACED INWARDLY OF SAID WALL, AN INWARDLY FLARED, OPEN ENDED SLEEVE AROUND AND SPAED FROM SAID SHAFT AND ATTACHED TO THE INNERMOST OF SAID PLATES, SAID INNERMOST PLATE HAVING AN OPENING AROUND SAID SHAFT ALIGNED WITH THE OPENING IN THE INNER END OF SAID SLEEVE, A SMALLER, INWARDLY FLARED, OPEN ENDED SLEEVE AROUND AND SPACED FROM SAID SHAFT AND ATTACHED TO THE OUTERMOST OF SAID PLATES, AND WITH ITS INNER END ADJACENT TO THE OUTER END OF SAID FIRST MENTIONED SLEEVE, SAID INNER END OF SAID SMALLER SLEEVE HAVING A SMALLER DIAMETER THAN SAID OUTER END OF SAID FIRST MENTIONED SLEEVE, A SEAL RING AROUND SAID SHAFT AND ATTACHED TO SAID OUTERMOST PLATE ADJACENT TO THE OUTER END OF SAID SMALLER SLEEVE, A THIRD, VERTICALLY EXTENDING PLATE SPACED OUTWARDLY OF SAID OUTERMOST PLATE AND HAVING AN OPENING AROUND SAID SHAFT, A SECOND SEAL RING AROUND SAID SHAFT AND ATTACHED TO SAID THIRD PLATE, MEANS INCLUDING SAID THIRD AND OUTERMOST PLATES AND SAID SEAL RINGS, FORMING AN AIR CHAMBER AROUND SAID SHAFT, AND MEANS FOR SUPPLYING COMPRESSED AIR INTO SAID CHAMBER.
Claim 2
Dependent Claim
207 words
A PRESSURIZED SEAL FOR A SHAFT OF A FAN HAVING A CASING WALL THROUGH WHICH THE SHAFT EXTENDS, COMPRISING A PAIR OF VERTICALLY EXTENDING, SPACED APART PLATES SPACED INWARDLY OF SAID WALL, AN INWARDLY FLARED, OPEN ENDED SLEEVE AROUND AND SPAED FROM SAID SHAFT AND ATTACHED TO THE INNERMOST OF SAID PLATES, SAID INNERMOST PLATE HAVING AN OPENING AROUND SAID SHAFT ALIGNED WITH THE OPENING IN THE INNER END OF SAID SLEEVE, A SMALLER, INWARDLY FLARED, OPEN ENDED SLEEVE AROUND AND SPACED FROM SAID SHAFT AND ATTACHED TO THE OUTERMOST OF SAID PLATES, AND WITH ITS INNER END ADJACENT TO THE OUTER END OF SAID FIRST MENTIONED SLEEVE, SAID INNER END OF SAID SMALLER SLEEVE HAVING A SMALLER DIAMETER THAN SAID OUTER END OF SAID FIRST MENTIONED SLEEVE, A SEAL RING AROUND SAID SHAFT AND ATTACHED TO SAID OUTERMOST PLATE ADJACENT TO THE OUTER END OF SAID SMALLER SLEEVE, A THIRD, VERTICALLY EXTENDING PLATE SPACED OUTWARDLY OF SAID OUTERMOST PLATE AND HAVING AN OPENING AROUND SAID SHAFT, A SECOND SEAL RING AROUND SAID SHAFT AND ATTACHED TO SAID THIRD PLATE, MEANS INCLUDING SAID THIRD AND OUTERMOST PLATES AND SAID SEAL RINGS, FORMING AN AIR CHAMBER AROUND SAID SHAFT, AND MEANS FOR SUPPLYING COMPRESSED AIR INTO SAID CHAMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |