US3718378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tail-shaft bearing assembly
Assignee: Turnbull Marine Design Co Ltd
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Filing: 1970-06-01
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Granted: 1973-02-27
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Expires: 1990-06-01
Abstract
Abstract In a propeller shaft bearing arrangement having a split bearing extending through an opening in the stern frame of a ship, one part of the bearing being removable while the ship is afloat and a seal being provided for preventing the entry of water through the opening, there is provided the improvement that the other part of the bearing may be adjusted in position or removed while the ship is afloat. An inflatable seal is provided for preventing the entry of water during the removal of the other part of the bearing. Jacks, rollers and a drive mechanism are provided for facilitating the removal of the other part, and taper wedges for securing the other part in its normal position.
Inventors
- 👤 J Clay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:33
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/32; B63H23/321; F; F16; F16C; F16C17/00; F16C17/12; F16C17/14; F16C17/20; F16C33/00; F16C33/72; F16C33/74; B63H2023/327; F16C2326/00; F16C2326/30
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
161 words
A propeller shaft bearing arrangement comprising a split bearing mounted in the stern frame of a ship and supporting a propeller shaft extending through an opening in the stern frame, the split bearing having an upper bearing part and a lower bearing part, means operatively connected to the upper bearing part for lifting the upper bearing part away from its normal operating position over the shaft and for moving it longitudinally inward of the ship, means operatively connected to the lower bearing part for lowering said lower bearing part away from its normal operating position below the shaft and for moving said lower bearing part longitudinally inward of the ship, means mounted between said frame and said lower bearing part for radially adjustable securing said lower bearing part in said opening, and seal means between the shaft and the stern frame operable to prevent the entry of water between the shaft and the stern frame on removal of said bearing parts.
Claim 2
Dependent Claim
161 words
A propeller shaft bearing arrangement comprising a split bearing mounted in the stern frame of a ship and supporting a propeller shaft extending through an opening in the stern frame, the split bearing having an upper bearing part and a lower bearing part, means operatively connected to the upper bearing part for lifting the upper bearing part away from its normal operating position over the shaft and for moving it longitudinally inward of the ship, means operatively connected to the lower bearing part for lowering said lower bearing part away from its normal operating position below the shaft and for moving said lower bearing part longitudinally inward of the ship, means mounted between said frame and said lower bearing part for radially adjustable securing said lower bearing part in said opening, and seal means between the shaft and the stern frame operable to prevent the entry of water between the shaft and the stern frame on removal of said bearing parts.
Claim 3
Dependent Claim
45 words
A propeller shaft lower bearing part arrangement as claimed in claim 1, wherein the means for radially adjustable securing said bearing in said opening includes taper wedges at opposite sides of said lower bearing part for adjustable locating the latter in its normal operational position.
Claim 4
Dependent Claim
18 words
A propeller shaft bearing arrangement as claimed in claim 1, wherein the sealing means comprises an inflatable seal.
Claim 5
Dependent Claim
23 words
A propeller shaft bearing arrangement as claimed in claim 3, wherein the seal means is radially expansible by inflation to seal said opening.
Claim 6
Dependent Claim
23 words
A propeller shaft bearing arrangement as claimed in claim 3, wherein the seal means is axially expansible by inflation to seal the opening.
Claim 7
Dependent Claim
29 words
A propeller shaft bearing arrangement as claimed in claim 3, wherein the seals means is provided between the stern frame and the hub of a propeller on the shaft.
Claim 8
Dependent Claim
30 words
A propeller shaft bearing arrangement as claimed in claim 1, wherein said lower part of the bearing is provided with a seal sealing the split bearing to the stern frame.
Claim 9
Dependent Claim
36 words
A propeller shaft bearing arrangement as claimed in claim 8, wherein the seal comprises a sealing portion secured to said lower bearing part at opposite sides of the shaft and extending around said upper bearing part.
Claim 10
Dependent Claim
32 words
A propeller shaft bearing arrangement as claimed in claim 1, wherein rollers are provided for supporting said lower bearing part during movement of the latter to and from its normal operational position.
Claim 11
Dependent Claim
31 words
A propeller shaft bearing arrangement as claimed in claim 9, wherein the rollers form parts of carriages disposed between said lower bearing part and a track provided on the stern frame.
Claim 12
Dependent Claim
32 words
A propeller shaft bearing arrangement as claimed in claim 9, wherein hydraulic jacks are provided for lifting said lower bearing part to allow installation of the rollers beneath said lowEr bearing part.
Claim 13
Dependent Claim
28 words
A propeller shaft bearing arrangement as claimed in claim 1, wherein a drive mechanism is provided for moving said lower bearing part to and from its normal position.
Claim 14
Dependent Claim
31 words
A propeller shaft bearing arrangement as claimed in claim 1, wherein hydraulic lifting means mounted for travel along a path above the shaft are provided for lifting said upper bearing part.
References Cited (Backward Citations)
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US3236570A
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US3337222A
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US3470842A
Cited
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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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |