US3654869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ship transfer system
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1970-07-27
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Granted: 1972-04-11
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Expires: 1990-07-27
Abstract
Abstract A less complex and more easily maintainable ship transfer system employing a pair of electrical motors, a double drum winch, and a direct mechanical gearing system interconnecting one of the motors to oppositely drive the drums, and the other motor to drive the drums in the same direction.
Inventors
- 👤 Alexander Lehrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:11
CPC Classifications
B; B63; B63B; B63B27/00; B63B27/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
119 words
In a two line system for transferring cargo between ships at sea, a pair of drums, a pair of individually energizable reversible motors, direct gearing means for interconnecting one of said motors to differentially rotate said drums in opposite directions and connecting the other of said motors to rotate said drums in the same direction, said gearing means responsive to concurrent operation of both motors to drive said drum according to the algebraic sum of the movements of said motors, an inhaul and outhaul line for both supporting and traversing said cargo between said ships, said inhaul line being wound and unwound on one of said drums and said outhaul line being wound and unwound on the other drum.
Claim 2
Dependent Claim
119 words
In a two line system for transferring cargo between ships at sea, a pair of drums, a pair of individually energizable reversible motors, direct gearing means for interconnecting one of said motors to differentially rotate said drums in opposite directions and connecting the other of said motors to rotate said drums in the same direction, said gearing means responsive to concurrent operation of both motors to drive said drum according to the algebraic sum of the movements of said motors, an inhaul and outhaul line for both supporting and traversing said cargo between said ships, said inhaul line being wound and unwound on one of said drums and said outhaul line being wound and unwound on the other drum.
Claim 3
Dependent Claim
38 words
In the system of claim 1, said gearing means including a pair of differential gears, each differential gear actuated by both motors to position a different drum according to the algebraic sum of the speeds of said motors.
Claim 4
Dependent Claim
13 words
In the system of claim 1, both of said motors being electrical motors.
Claim 5
Dependent Claim
22 words
In the system of claim 1, an automatically operating brake associated with each motor to prevent movement wherever the motor is deenergized.
Claim 6
Dependent Claim
15 words
In the system of claim 1, an independently actuatable brake for each of said drums.
Claim 7
Dependent Claim
22 words
In the system of claim 1, a rotatable sheave on the receiving ship for receiving and returning said inhaul and outhaul lines.
Claim 8
Dependent Claim
25 words
In the system of claim 1, means for maintaining preset total tension on both lines comprising a single ram tensioner for conjointly tensioning both lines.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |