Patent US2608519A successfully refreshed from Google Patents.
Patent US4085941A successfully refreshed from Google Patents.
US4085941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stern seals for ships
Assignee: Crane Packing Ltd
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Filing: 1976-06-11
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Granted: 1978-04-25
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Expires: 1996-06-11
Abstract
Abstract In a stern seal and bearing assembly for the stern shaft of a ship there is an oil seal assembly at the outboard end of the bearing and a sea water seal (preferably a face seal) axially spaced from it, with a drain from the space between the two, and the oil seal assembly comprises a pair of lip seals directed towards each other with a drain from the space between them. The oil supply to the bearing can be at low pressure, for example simply the static head from a tank slightly above the level of the bearing, and the last-mentioned drain may have a swan neck above the oil level.
Inventors
- 👤 Samuel Clifford Walter Wilkinson
- 👤 Ronald Sydney Sweett
- 👤 Thomas Walter Bunyan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:47
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/002; F16J15/004; B; B63; B63H; B63H23/00; B63H23/32; B63H23/321; F16J15/008; B63H2023/327
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
127 words
A stern seal and bearing assembly for ships comprising a bearing, a stern shaft rotatable in said bearing, means for supplying low pressure oil to said bearing, said bearing having inboard and outboard ends, a first seal assembly mounted at the outboard end of said bearing, a second seal assembly axially spaced away from said first seal assembly in a direction away from said bearing, a stern frame, said stern frame having mounted therein said first and second seal assemblies and said bearing and defining, between said seal assemblies, a void space, and means draining said void space, said first seal assembly comprising two lip seals spaced apart axially to define a second void space and directed towards one another, and means draining said second void space.
Claim 2
Dependent Claim
127 words
A stern seal and bearing assembly for ships comprising a bearing, a stern shaft rotatable in said bearing, means for supplying low pressure oil to said bearing, said bearing having inboard and outboard ends, a first seal assembly mounted at the outboard end of said bearing, a second seal assembly axially spaced away from said first seal assembly in a direction away from said bearing, a stern frame, said stern frame having mounted therein said first and second seal assemblies and said bearing and defining, between said seal assemblies, a void space, and means draining said void space, said first seal assembly comprising two lip seals spaced apart axially to define a second void space and directed towards one another, and means draining said second void space.
Claim 3
Dependent Claim
44 words
The stern seal and bearing assembly set forth in claim 1 wherein said means draining said second void space include pressure-loaded means preventing escape from said second void space except at a pressure higher than the pressure of said low pressure oil supply means.
Claim 4
Dependent Claim
23 words
The stern seal and bearing assembly set forth in claim 1 including a third seal assembly at said inboard end of said bearing.
Claim 5
Dependent Claim
206 words
A stern seal and bearing assembly for ships comprising a bearing, a stern shaft rotatable in said bearing, means for supplying low pressure oil to said bearing, said bearing having inboard and outboard ends, a first seal assembly mounted at the outboard end of said bearing, a second seal assembly axially spaced away from said first seal assembly in a direction away from said bearing, a stern frame, said stern frame having mounted therein said first and second seal assemblies and said bearing and defining, between said seal assemblies, a void space, and means draining said void space, said first seal assembly comprising two lip seals spaced apart axially to define a second void space and directed towards one another, and means draining said second void space, said means draining said second void space include pressure-loaded means preventing escape from said second void space except at a pressure higher than the pressure of said low pressure oil supply means, said oil supply means comprising an unpressurized oil tank having a static head above said bearing and said pressure-loaded means comprising a swan neck pipe in said means draining said second void space, said swan neck pipe including a portion at a higher level than said tank.
Claim 6
Dependent Claim
206 words
A stern seal and bearing assembly for ships comprising a bearing, a stern shaft rotatable in said bearing, means for supplying low pressure oil to said bearing, said bearing having inboard and outboard ends, a first seal assembly mounted at the outboard end of said bearing, a second seal assembly axially spaced away from said first seal assembly in a direction away from said bearing, a stern frame, said stern frame having mounted therein said first and second seal assemblies and said bearing and defining, between said seal assemblies, a void space, and means draining said void space, said first seal assembly comprising two lip seals spaced apart axially to define a second void space and directed towards one another, and means draining said second void space, said means draining said second void space include pressure-loaded means preventing escape from said second void space except at a pressure higher than the pressure of said low pressure oil supply means, said oil supply means comprising an unpressurized oil tank having a static head above said bearing and said pressure-loaded means comprising a swan neck pipe in said means draining said second void space, said swan neck pipe including a portion at a higher level than said tank.
Claim 7
Dependent Claim
137 words
A stern seal and bearing assembly for ships comprising a bearing, a stern shaft rotatable in said bearing, means for supplying low pressure oil to said bearing, said bearing having inboard and outboard ends, a first seal assembly mounted at the outboard end of said bearing, a second seal assembly axially spaced away from said first seal assembly in a direction away from said bearing, a stern frame, said stern frame having mounted therein said first and second seal assemblies and said bearing and defining, between said seal assemblies, a void space, and means draining said void space, said first seal assembly comprising two lip seals spaced apart axially to define a second void space and directed towards one another, and means draining said second void space, said second seal assembly comprising a rotary mechanical face seal.
Claim 8
Dependent Claim
137 words
A stern seal and bearing assembly for ships comprising a bearing, a stern shaft rotatable in said bearing, means for supplying low pressure oil to said bearing, said bearing having inboard and outboard ends, a first seal assembly mounted at the outboard end of said bearing, a second seal assembly axially spaced away from said first seal assembly in a direction away from said bearing, a stern frame, said stern frame having mounted therein said first and second seal assemblies and said bearing and defining, between said seal assemblies, a void space, and means draining said void space, said first seal assembly comprising two lip seals spaced apart axially to define a second void space and directed towards one another, and means draining said second void space, said second seal assembly comprising a rotary mechanical face seal.
Claim 9
Dependent Claim
38 words
The stern seal and bearing assembly set forth in claim 5 wherein said second seal assembly includes a stationary mounting ring attached to said stern frame and wherein said first seal assembly is mounted in said mounting ring.
Claim 10
Dependent Claim
144 words
A stern seal and bearing assembly for ships comprising a bearing, a stern shaft rotatable in said bearing, means for supplying low pressure oil to said bearing, said bearing having inboard and outboard ends, a first seal assembly mounted at the outboard end of said bearing, a second seal assembly axially spaced away from said first seal assembly in a direction away from said bearing, a stern frame, said stern frame having mounted therein said first and second seal assemblies and said bearing and defining, between said seal assemblies, a void space, and means draining said void space, said first seal assembly comprising two lip seals spaced apart axially to define a second void space and directed towards one another, and means draining said second void space, wherein said oil supply means comprises an unpressurized oil tank having a static head above said bearing.
Claim 11
Dependent Claim
144 words
A stern seal and bearing assembly for ships comprising a bearing, a stern shaft rotatable in said bearing, means for supplying low pressure oil to said bearing, said bearing having inboard and outboard ends, a first seal assembly mounted at the outboard end of said bearing, a second seal assembly axially spaced away from said first seal assembly in a direction away from said bearing, a stern frame, said stern frame having mounted therein said first and second seal assemblies and said bearing and defining, between said seal assemblies, a void space, and means draining said void space, said first seal assembly comprising two lip seals spaced apart axially to define a second void space and directed towards one another, and means draining said second void space, wherein said oil supply means comprises an unpressurized oil tank having a static head above said bearing.
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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) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |