Patent ID: 11971105
Assignee: SINGLE BUOY MOORINGS INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A swivel comprising
an inner swivel member and an outer swivel member that is arranged rotatably around the inner swivel member, wherein the swivel members have respective fluid paths communicating with each other through an annular space at an interface between the swivel members;
a sealing arrangement on a side of the annular space at the interface, the sealing arrangement comprising:
a peripheral groove provided in the inner swivel member or in the outer swivel member; and
a sealing element received within the peripheral groove and arranged to statically seal against a first one of the swivel members inside the peripheral groove and to dynamically seal against a second one of the swivel members;

wherein a surface inside the peripheral groove in the first one of the swivel members abutting the sealing element is a textured surface extending along at least a part of two inner surfaces of the peripheral groove, the textured surface having three-dimensional textural elements for making frictional contact with the sealing element and wherein a cross-sectional shape of the textured surface, seen perpendicular to a radial plane of the peripheral groove, is substantially L-shaped textured surface, and wherein the sealing arrangement comprises a shim, positioned between the sealing element and an inner surface of the peripheral groove in the first one of the swivel members, wherein the shim forms an L-shape, and,
wherein a first leg of the L-shaped textured surface extends along an inner side surface of the peripheral groove and wherein a second leg of the L-shaped textured surface extends along a first part of a bottom surface of the peripheral groove, such that a second part of the bottom surface is non-textured and wherein the sealing element abuts both the first and second part of the bottom surface.