SHIP TRANSFER SYSTEM

• US 3,654,869 A
• Filed: 07/27/1970
• Issued: 04/11/1972
• Est. Priority Date: 07/27/1970
• Status: Expired due to Term

• Current Assignee: Alexander Lehrer
• Original Assignee: Alexander Lehrer
• Inventors: Lehrer, Alexander
• Primary Examiner(s): Forlenza, Gerald M.
• Assistant Examiner(s): Werner, Frank E.
• Application Number:
  US05/058,455
• Time in Patent Office: 624 Days
• Field of Search: 214/12,13,14,15R 212/72 104/112,114 254/172
• US Class Current: 104/114
• CPC Class Codes: B63B 27/18 of cableways, e.g. with breeches-buoys

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.

Claims

1. 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.

2. 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.

3. In the system of claim 1, both of said motors being electrical motors.

4. In the system of claim 1, an automatically operating brake associated with each motor to prevent movement wherever the motor is deenergized.

5. In the system of claim 1, an independently actuatable brake for each of said drums.

6. In the system of claim 1, a rotatable sheave on the receiving ship for receiving and returning said inhaul and outhaul lines.

7. 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.