Patent ID: 8640673

Claim:
A fuel pipe assembly for supplying fuel to a fuel injector, the fuel injector to be located within a bore of an engine cylinder head, the fuel pipe assembly comprising: a tube nut for connecting the fuel pipe to the fuel injector; and a securing arrangement comprising a locking nut and a deformable clamp member for securing the fuel pipe within the tube nut; wherein the tube nut comprises a tubular member defining an axial bore therethrough to receive a length of the fuel pipe, a distal end shaped for cooperation with the head of the fuel pipe, and a proximal end having an attachment mechanism for engaging a compatible attachment mechanism of the locking nut; the locking nut is provided with an axial bore to receive a length of the fuel pipe, and an attachment mechanism for engaging the compatible attachment mechanism of the proximal end of the tube nut; and the clamp member defines a bore to receive a length of the fuel pipe and is deformable under compression from an unstrained configuration to a strained configuration; and wherein, in a first state of engagement, the locking nut and tube nut define a volume therebetween that accommodates the clamp member in its unstrained configuration and the fuel pipe is able to move laterally in the region of the clamp member, and in a second state of engagement, the clamp member is compressed between the locking nut and tube nut into a strained configuration such that lateral movement of the fuel pipe is constrained, thereby to secure the fuel pipe within the tube member.