Abstract: A novel, modified cathode device having partially dome shaped portion with a cathode flat surface therealong has been created, whereby arc rotational movement is significantly improved over conventional cathode designs. A complimentary cathode holder with enhanced cooling features is provided to prevent overheating of the cathode tip. The end result is an improved, more versatile plasma arc spray gun that can run at elevated power and enthalpy levels without incurring thermal damage.

Abstract: The present Invention concerns a clamp (20) for mounting upon an elongate member such as a riser (24) to be deployed underwater. The clamp may for example be intended to prevent movement of a buoyancy module along a riser. The clamp comprises a plurality of clamp bodies (22) to be placed at circumferential intervals about the elongate member. A strap (42) is provided which is to be placed around the clamp bodies and tensioned to urge the clamp bodies toward the elongate member, enabling the clamp to resist movement along it. The clamp bodies comprise respective spring elements (28) which are arranged, when the clamp is assembled and mounted, between the clamp bodies and the elongate member. The clamp bodies and the spring elements are shaped to permit them to be used in clamps having a range of different diameters and having a differing number of clamp bodies.

Abstract: The present Invention concerns a clamp (20) for mounting upon an elongate member such as a riser (24) to be deployed underwater. The clamp may for example be intended to prevent movement of a buoyancy module along a riser. The clamp comprises a plurality of clamp bodies (22) to be placed at circumferential intervals about the elongate member. A strap (42) is provided which is to be placed around the clamp bodies and tensioned to urge the clamp bodies toward the elongate member, enabling the clamp to resist movement along it. The clamp bodies comprise respective spring elements (28) which are arranged, when the clamp is assembled and mounted, between the clamp bodies and the elongate member. The clamp bodies and the spring elements are shaped to permit them to be used in clamps having a range of different diameters and having a differing number of clamp bodies.

Abstract: Described are methods of coating a polymer substrate including thermal coating substrate with a metallic boundary material to form a first layer and thermal coating the first layer with a metallic thermal spray material to form a second layer. Related coated articles, coated members, actuators and other items are also included.

Abstract: There is disclosed a cladding section 8 for mounting upon an elongate underwater member and suppressing vortex induced vibration of it, the section including a unitary plastics moulding shaped to provide a tubular 10 portion for receiving the member, the tubular portion being split along its length at 14 and being deformable to permit the member to be introduced into the tubular portion, and the cladding section having at its exterior at least one feature 12 shaped to suppress vortex induced vibration. Rotational moulding of the cladding section is disclosed. The cladding section has an outer layer 24 incorporating anti-fouling material upon an inner structural layer 26.