Abstract: A plug or poppet valve is positioned in relation to an opening for controlling flow through the opening, with a flange positioned over the side opening and having a portion extending into the interior of the housing towards the plug or poppet, said flange and its extended portion having a circular cross-section opening therethrough, said opening having an interior pre-determined pitch thread over a lower portion of its length.

Abstract: A method of producing a multi-ply metal bellows wherein the plies are telescoped together to form a multi-ply tube and annular grooves are inwardly rolled in the multi-ply tube at spaced intervals therealong while the tube is supported internally on either side of the grooves, as they are rolled, and is held against substantial deformation. Crest and root constraining dies are assembled around the multi-ply tube and in the grooves and then the tube is pressurized internally, while the dies are pushed together, so that the undeformed portions of the tube bulge outwardly into the dies. The bellows is then completed by removing the dies and putting spacing shims in between the bulged convolution crest portions and then pushing the ends of the tubes until the shims are lightly held between the bulges.

Abstract: A method of seam welding metal tube from a sheet metal blank wherein the sheet metal blank is provided with central key locating slots and pre-curled edges, then centrally located on a collapsible mandrel, having a heat sink liner extending therearound to a longitudinally extending gas gallery slot, by the key locating slots and then skid rolled therearound towards a longitudinally extending gas gallery slot for seam welding the curled edges while they are clamped to the collapsible mandrel over the gas gallery slot. Pre-curling the edges avoids upstanding edges at the seam weld and the method provides consistently reliable welds for tube blanks which may be manufactured in short lengths for, for example, the manufacture of bellows.

Abstract: A sealed torque transmission assembly comprising a casing having a drive shaft rotatably mounted to extend through a wall portion into the casing and terminate with an eccentric end portion which is parallel with the axis of rotation of the drive shaft. An externally toothed, non-rotating driving gear is mounted on a bearing on the eccentric end portion and held against rotation by an anti-rotation sleeve which is coupled by involute teeth at one to the casing and at the other end to the driving gear. A flexible bellows around the drive shaft seals the externally toothed, non-rotating drive gear to the casing. An internally toothed driven gear, having a greater number of teeth than the driving gear and teeth which mesh with at least one tooth of the drive gear, is mounted on a driven shaft which is also mounted for rotation in a wall portion of the casing.