No coin nor oath required. For personal study only.
A further variation of the threaded joint for oil and gas pipes is described. It creates a metalto-metal seal externally to the female thread. The joint has an extension of the box beyond the seal, which produces an elastic tightening band effect on the seal so that excessive interference on the seal is not necessary. This facilitates correct assembly of the joint.
๐ SIMILAR VOLUMES
This invention concerns a multi-layered cylinder-head gasket. An intermediate layer has a variable cross-section around the circumference of the cylinder bores, and may include slits shaped in a circular arc. This helps to optimise the contact pressure of the gasket and reduce bending of the interme
This patent describes a design of butt joint for pistons rings which from the description are used as shaft seals. The rings have a stepped butt joint and one half of the joint has a surface that slopes in the circumferential direction and is engaged by the opposing half of the ring.