US3067716A

US3067716A - Mooring devices

Info

Publication number: US3067716A
Application number: US179541A
Authority: US
Inventors: Norlin Lars Olof Knutson
Original assignee: INTERNAT MARINE AND OIL DEV CO
Current assignee: INTERNAT MARINE AND OIL DEV CO; INTERNATIONAL MARINE AND OIL DEVELOPMENT Corp AB
Priority date: 1961-03-18
Filing date: 1962-03-14
Publication date: 1962-12-11
Anticipated expiration: 1979-12-11

Description

Dec. 11, 1962 Filed March 14, 1962 L. 0. K. NORLlN 3,067,716

MOORING DEVICES 2 Sheets-Sheet 1 We )l/LM Dec. 11, 1962 Filed March 14, 1962 L. O. K. NORLIN MOORING DEVICES 2 Sheets-Sheet 2 United States Patent 3,067,716 MOORING DEVIfiES Lars Olof Knutson Norlin, Lidingo, Sweden, assignor to AB International Marine and Oil Development Corporation, Stockholm, Sweden, a corporation of Sweden Filed Mar. 14, 1962, Ser. No. 179,541 Claims priority, applicahion Sweden Mar. 18, 1961 1 Claim. (Cl. 114-230) This invention relates to a device in a buoy for so mooring ships to the buoy that they can swing about it.

The primary object of the invention is to secure a mooring means for belaying mooring ropes or chain cables in such a way to the buoy that the forces transferred from the mooring ropes etc. to the buoy are distributed and do not give rise to great point loads and that especially upwardly directed force components are given a suitable point of attack on the buoy so as not to cause it to turn over.

Further objects of the invention and the advantages thereof will become apparent from the following description, reference being had to the accompanying drawings, in which:

FIG. 1 is a side elevational view of the mooring device;

FIG. 2 is a plan view thereof partly in section on line II-II in FIG. 1.

The drawings show the mooring device mounted on a circular buoy which is but fragmentarily illustrated.

In the drawings, designates the buoy which is supposed to serve to transfer liquid load between a ship moored to the buoy and a liquid depot located on the bottom of the sea or on a neighbouring shore. For this purpose the buoy is equipped with a centrally located pipe swivel indicated at 11.

The mooring device comprises a collar 12 disposed centrally on the upper side or deck of the buoy and projecting above it. At the upper edge said collar has an outwardly directed flange 13, which together .with the deck and the collar form an outwardly open U-profile. Disposed in said U-profile is a ring 14 which by means of rollers 15 is journalled on the collar to transmit radial forces and by means of rollers 16, carried by the ring, is guided with clearance between the deck of the buoy and the flange 13 to transmit upwardly and downwardly directed vertical forces.

The ring 14 has two diametrically projecting pivot pins 17, and an arm 18 which is fork-shaped at one end has its fork prongs 19 mounted on the pivot pins 17 with the arm directed radially outwardly from the ring. Near the free end the arm 18 has a roller 20 so that it can readily swing about the center of the ring 14 with the roller 20 running on a rail 21 attached to the deck of the buoy.

At the free end the arm 18 has a belaying means 22 including a double snatch block 23 for ropes and a hook 24 for a chain cable.

The construction illustrated provides a force transmitting device between the belaying means 22 and the buoy, more particularly the collar 12, which device is advantageous in various aspects. The horizontal pull component is distributed over almost half the circumference of the collar 2 and the ring 14, and when the arm 18 is swung horizontally because it is not aligned with the mooring, the swinging force will get favourable points of attack on the ring 14, viz. the two pivot pins 17. When a large ship is moored to the buoy by a short rope or chain cable which slants steeply upward from the buoy the vertical component of the pull has a central point of attack on the buoy and thus is not able, in combination with the anchoring of the buoy to the bottom of the sea, to cause the buoy to heel over. Furthermore the vertical force is distributed by the ring 14 and the rollers 16 to several points along the circumference of the flange 13. C01- lectively, these features imply that the mooring device although not very heavily dimensioned-is capable of holding large ships against wind and current.

What I claim and desire to secure by Letters Patent is:

In a buoy having a fixed deck, a device for mooring ships to the buoy comprising a circular collar projecting above the deck, a flange extending from the upper edge of the collar and thus forming together with the collar and the deck an outwardly open U-profile, a ring situated within the U-profile, a first annular row of rollers by which the ring is journalled on the collar to transfer radial forces, a second annular row of rollers by which the ring is guided between the deck and the flange for transferring upwardly and downwardly directed axial forces, a pair of pivot pins projecting diametrically from said ring, an arm having one end fork-shaped and the fork prongs pivoted on said pivot pins and thus being freely swingable upwards from said deck, and mooring means on the free end of said arm.

No references cited.