The invention relates to a flat seal such as those that are used in motor vehicle construction in particular. Such flat seals can be used for example as seals in the exhaust tract of internal combustion engines, as cylinder head gaskets, or also as hydraulic system control plates. Hydraulic system control plates, such as transmission control plates for example, always have a sealing function in addition to a fluid control function simultaneously.

A hydrogen storage material tank including a shell along a longitudinal axis, a hydrogen supply and collection duct along a longitudinal axis, a stack of plural cups around the duct, wherein each cup includes a base perpendicular to the longitudinal axis, a passage allowing installation of the cup around the duct, an outer wall perpendicular to the base, in contact with the shell and an inner wall perpendicular to the base and in contact with the duct, wherein each cup is force-fitted on the duct and each cup includes a mechanism allowing mutual engagement of the cups in one another by mechanical deformation of free ends of the outer walls of the cups.

Adjoining edges of adjacent honeycomb core panel sections are mechanically interlocked. In one embodiment, the method includes forming a first edge along a first cellular core panel section. The first edge includes a first plurality of edge cell walls along the first edge. The method further includes forming a second edge along a second cellular core panel section, wherein the second edge includes a second plurality of edge cell walls along the second edge. The first edge is positioned proximate to the second edge. At least a portion of at least one of the first plurality of edge cell walls is mechanically interlocked with at least a portion of at least one of the second plurality of edge cell walls to form a joint therebetween. A composite structure may be at least partially produced by such a method.

Systems and methods are disclosed herein for dressing centering a bearing compartment in a gas turbine engine. A nut may be inserted through an outer case of a gas turbine engine. The nut may be coupled to a strut which centers a bearing compartment. The nut may be rotated to achieve a desired tension on the strut to center the bearing compartment. A retaining plate comprising a collar may be positioned over the nut. A swaging tool comprising a swaging ramp may be positioned over the nut. The swaging tool may be forced against the retaining plate using a draw-in bolt. The swaging ramp may contact the collar and form indentations in the collar to lock the nut in place.

Methods for crimping a stent on an expandable member of a delivery catheter, and devices and methods for treating a bifurcation are disclosed. A method for crimping includes positioning a stent having a first portion and a second portion over the expandable member, and non-uniformly crimping the stent to the expandable member. The method can include routing an elongate shaft under the second portion of the stent and through the side hole so as to be routed external to the first portion. The stent second portion can be crimped so that the elongate shaft can be slidably disposed relative to the stent second portion prior to deployment of the stent.

The invention relates to a method for producing a ring-shaped or plate-like element, in particular for a metal-sealing material-feedthrough, in particular for devices which are subjected to high pressures, for example igniters for airbags or belt tensioning devices, whereby a blank, especially in the embodiment of a wire-shaped material is provided and the blank is subjected to processing so that a feedthrough-opening can be incorporated into a ring-shaped or plate-like element created from the blank.

A system for treating a bifurcation includes first and second delivery catheters, each having an expandable member. A stent having a side hole is disposed on the second delivery catheter. A portion of the first delivery catheter is disposed under a portion of the stent. The first delivery catheter is slidable relative to the second delivery catheter, and the first delivery catheter passes through the side hole. Expansion of the first expandable member expands a proximal portion of the stent in a main branch vessel, and expansion of the second expandable member expands a distal portion of the stent in a side branch vessel.

A stent has one or more redundant crests for a ring. The redundant crest is located at a Y-crown for a peak-to-valley type stent pattern in one example. The stent may also have frangible bridges for connecting links. The stent's radial stiffness decreases when a redundant crest fractures and its axial and bending stiffness decreases when a frangible bridge breaks.

A method for joining and sealing two grooved-ended pipe segments without disassembling a coupling is disclosed. The coupling has a housing with upper and lower arcuate housing segments and left and right bridge segments. Each bridge segment has at least one set of dihedrally angled faces that engage corresponding faces each in the upper and lower housing segments. Drawing the upper and lower segments inwardly together along a first axis, presses each bridge segment inward along a second axis roughly tangential to the first axis. All segments are loosely pre-assembled into a coupling which has a one-piece circular sealing gasket that has an inward circumferential and centrally positioned pipe stop that has an inner diameter smaller than an outer diameter of the pipes to be joined.

A tubular guide suitable for use as an operating channel for the passage of surgical instruments in an inch-worm-type locomoted endoscopic instrument is described. The guide is fixed to the ends of the central body of the endoscopic instrument and has an elastic and corrugated intermediate portion so as to follow the elongations and the contractions of the central body of the endoscopic instrument without creating an obstacle to the passage of instruments.