Patent US3565447A successfully refreshed from Google Patents.
US3565447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stern tube seal
Assignee: Institut fuer Schiffbau
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Filing: 1968-07-12
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Granted: 1971-02-23
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Expires: 1988-07-12
Abstract
Abstract A seal for the sea water end of oil-lubricated stern tubes. Relative axial movement between a bushing for a ship''s propeller shaft and an annular seal surrounding the bushing is prevented by an axial slide bearing. The annular slide bearing includes a stop shoulder fixed to the bushing which is adapted to abut a complementary shoulder of the guide ring of the seal. A felt sealing element is located on each side of the bearing in order to prevent abrasion products generated by contact between the bushing and a plurality of shaft packing rings from entering the slide bearing. The foregoing abstract is not intended to define the scope of the invention and is only provided to permit a cursory review of the gist of the invention.
Inventors
- 👤 Joachim Lucy
- 👤 Hans Peter Goetze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:47
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/32; B63H23/321; F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3224; B63H2023/327
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
123 words
A seal for the sea water end of stern tubes with oil lubrication comprising: a housing having an oil chamber for lubricating said seal; a bushing positioned within a guide ring in said housing, said bushing adapted to be drawn over a ship''s propeller shaft; a plurality of packing rings abutting said bushing for the purpose of preventing the entrance of sea water into the stern tube and the leakage of oil from said stern tube; an elastic collar for connection between said guide ring and said stern tube for permitting axial and radial movement of said guide ring together with said bushing with respect said stern tube; and means for preventing relative axial movement between said bushing and said seal packing rings.
Claim 2
Dependent Claim
123 words
A seal for the sea water end of stern tubes with oil lubrication comprising: a housing having an oil chamber for lubricating said seal; a bushing positioned within a guide ring in said housing, said bushing adapted to be drawn over a ship''s propeller shaft; a plurality of packing rings abutting said bushing for the purpose of preventing the entrance of sea water into the stern tube and the leakage of oil from said stern tube; an elastic collar for connection between said guide ring and said stern tube for permitting axial and radial movement of said guide ring together with said bushing with respect said stern tube; and means for preventing relative axial movement between said bushing and said seal packing rings.
Claim 3
Dependent Claim
45 words
The seal of claim 1 in which said Means for preventing relative axial movement includes a stop shoulder on said bushing, said stop shoulder adapted to abut a complementary shoulder of said guide ring such that said preventing means acts as an axial slide bearing.
Claim 4
Dependent Claim
50 words
The seal of claim 2 in which said packing rings are separated from said axial slide bearing by a pair of sealing elements, one which is positioned on one side of the axial slide bearing, the other sealing element being positioned on the other side of said axial slide bearing.
Claim 5
Dependent Claim
22 words
The seal of claim 3 in which said sealing elements are comprised of felt, and said elements have a trapezoidal cross section.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |