US3606350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic shaft seal
Assignee: Sundstrand Corp
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Filing: 1969-07-02
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Granted: 1971-09-20
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Expires: 1989-07-02
Abstract
Abstract A HYDROSTATIC SHAFT SEAL INCLUDING AN ANNULAR SEALING RING ROTATABLE WITH THE SHAFT HAVING A RADIAL SEALING SURFACE ADJACENT TO A STEPPED HYDROSTATIC SEALING SURFACE ON A FLOATING FREELY ROTATABLE NOSEPIECE THAT IS CENTERED RADIALLY ON A STATIONARY CENTERPOST LOCATED THEREWITHIN BY AN ADDITIONAL HYDROSTATIC SEALING FLUID FILM.
Inventors
- 👤 Homer E Gravelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:24
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3404
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |