US3333856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Labyrinth type face seal
Assignee: Bank of America Illinois
•
Filing: 1964-04-22
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Granted: 1967-08-01
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Expires: 1984-04-22
Abstract
No abstract record available.
Inventors
- 👤 Robert M Voitik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:24
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3404; F16J15/3408; F16J15/3412; F16J15/3416; Y; Y10; Y10S; Y10S277/00; Y10S277/907
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
A LABYRINTH TYPE FACE SEAL COMPRISING, IN COMBINATION, A GENERALLY ANNULAR STATOR DEFINING AN INWARDLY OPENING ANNULAR CHAMBER HAVING OPPOSED AXIAL SEALING FACES, A PAIR OF ROTOR RINGS DISPOSED IN SAID CHAMBER AND HAVING AXIAL FACES ABUTTING SAID STATOR FACES, A SEALING MEMBER DISPOSED BETWEEN THE ADJACENT PERIPHERIES OF SAID RINGS SO AS TO DEFINE AN INNER ANNULAR CHAMBER BETWEEN SAID RINGS, MEANS FOR RESILIENTLY URGING SAID RING FACES AGAINST SAID STATOR FACES, MEANS FOR INTRODUCING FLUID UNDER PRESSURE INTO SAID CHAMBER AND AROUND SAID RINGS AND SEALING MEMBER, AND MEANS FOR MAINTAINING A FLUID
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |