US3685368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing system for minimizing shaft tilting
Assignee: IMO Industries Inc
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Filing: 1971-02-09
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Granted: 1972-08-22
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Expires: 1991-02-09
Abstract
Abstract In order to reduce the tilting of the section of a ship''s shafting system which carries the main drive gear and thereby improve the load distribution between meshing gear teeth, a bearing system is provided comprising a pair of ordinary cylindrical journal bearings, one on either side of the main drive gear, and a pair of additional bearings, each located next to one of the cylindrical journal bearings. The latter bearings serve to provide a spring scale in the horizontal direction sufficient to reduce tilting of the main gear shaft section.
Inventors
- 👤 Frederic A Thoma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:48
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/02; F16H57/028; F16H57/021; F16H57/022; F16H57/023; F16H2057/02039; F16H2057/02043; F16H2057/0206; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19628
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
85 words
A power transmission for use in a ship''s drive system comprising a rotatable shaft a large diameter gear mounted on said rotatable shaft and adapted to mesh with at least one pinion rotated by an engine, a pair of journal bearings supporting said shaft for rotation about a generally horizontal axis, said journal bearing being arranged on said shaft on opposite sides of said gear, and means located along said shaft on both sides of said gear for increasing the horizontal stiffness of said shaft.
Claim 2
Dependent Claim
85 words
A power transmission for use in a ship''s drive system comprising a rotatable shaft a large diameter gear mounted on said rotatable shaft and adapted to mesh with at least one pinion rotated by an engine, a pair of journal bearings supporting said shaft for rotation about a generally horizontal axis, said journal bearing being arranged on said shaft on opposite sides of said gear, and means located along said shaft on both sides of said gear for increasing the horizontal stiffness of said shaft.
Claim 3
Dependent Claim
29 words
A power transmission according to claim 1 in which said means for increasing stiffness comprises a pair of elliptical bearings having their minimum clearances substantially in the horizontal direction.
Claim 4
Dependent Claim
37 words
A power transmission according to claim 1 in which said means for increasing stiffness comprises a pair of bearings positioned along said shaft so that each is separated from said gear by one of said journal bearings.
Claim 5
Dependent Claim
82 words
A power transmission according to claim 1 in which said means for increasing stiffness comprises a pair of bearings supporting said shaft on opposite sides of said gear, each of the last-mentioned bearings having a spring scale in the horizontal direction such that the allowable horizontal movement of the section of shaft supported thereby as a result of any given force is less than that which would be allowed by the journal bearing on the same side of the gear acting alone.
Claim 6
Dependent Claim
66 words
A power transmission according to claim 1 in which said means for increasing stiffness comprises a pair of stiffening bearings positioned along said shaft on opposite sides of said gear, means mounting the journal bearing and the stiffening bearing on each side of said gear and preventing independent movement of the said journal bearing and stiffening bearing as a result of foundation movements and hull deflections.
References Cited (Backward Citations)
US3435694A
Cited
US3559498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |