The recessed-key panel interlocking device is intended to provide a mechanical joint that can connect two panels using a single fastening key. Accordingly, the device connects two panels by interlocking uniform gaps and fingers that have been formed on the edges of each panel, by a small cylindrical key that holds them together. To accomplish this, a channel that can hold the key is formed along the edge region of both panels when the panels are oriented normally to one another. Further, when the panels are interlocked, the key is completely recessed within the panel material. Furthermore, while the panel edges that form the joint must be uniformly rectilinear and meet at right angles at the joint itself, beyond the joint they can assume any shape and bend to any angle, so that parts joined by the joint do not have to be panel-shaped or perpendicular to each other overall.

A retaining clip for constraining a heat shield for use with an aircraft wheel assembly. The retaining clip includes a first end and a second end axially opposite the first end, the first end being opposite the second end along a longitudinal axis. The retaining clip further includes a first side and a second side each having a curvature forming a U-shaped cross section such that an outer edge of each of the first side and the second side extends back towards the longitudinal axis. The retaining clip further includes a migration stop defined by the first side at the first end, the migration stop extending past the outer edge of the second side and configured to interface with hooks of the heat shield to resist axial movement of the retaining clip relative to the heat shield.

The recessed-key panel interlocking device is intended to provide a mechanical joint that can connect two panels using a single fastening key. Accordingly, the device connects two panels by interlocking uniform gaps and fingers that have been formed on the edges of each panel, by a small cylindrical key that holds them together. To accomplish this, a channel that can hold the key is formed along the edge region of both panels when the panels are oriented normally to one another. Further, when the panels are interlocked, the key is completely recessed within the panel material. Furthermore, while the panel edges that form the joint must be uniformly rectilinear and meet at right angles at the joint itself, beyond the joint they can assume any shape and bend to any angle, so that parts joined by the joint do not have to be panel-shaped or perpendicular to each other overall.

On an outer circumferential edge of a closing plate, an elastic fitting portion protruding to an outer side of an inner circumferential edge of a service hole and fitting with the inner circumferential edge projects with a thickness larger than the plate thickness of the closing plate and extends in the circumferential direction of the outer circumferential edge. The elastic fitting portion is provided with an inner circumferential edge accommodating recessed groove that opens in the center of a protruding end surface of the elastic fitting portion and extends in the circumferential direction to accommodate the inner circumferential edge of the service hole, and the inner circumferential edge of the service hole is clamped between a pair of elastic clamping pieces that face each other with the inner circumferential edge accommodating recessed groove interposed between the pair of elastic clamping pieces.

A coating cover with a metal structure for roofs of buildings comprises a plurality of slabs of substantially quadrilateral shape, each of which is provided with lateral edges that are parallel and opposite to one another for mutual connection between adjacent slabs in a longitudinal direction and for formation of a joint positioned between each of the adjacent slabs. The lateral edges comprise a first set of folds at least partially symmetrical on the two edges. The lateral edges also include a second set of folds on at least one of the lateral edges, and a third set of folds on at least one other lateral edge. The lateral edges comprise at least one curvature at one of the first set of folds placed horizontal and parallel to the installation base. The cover also has at least one fixing bracket that is configured to join the lateral edges.

On an outer circumferential edge of the closing plate, an elastic fitting portion protruding to the outer side of the inner circumferential edge of the service hole and fitting with the inner circumferential edge projects with a thickness larger than the plate thickness of the closing plate and extends in the circumferential direction of the outer circumferential edge. The elastic fitting portion is provided with an inner circumferential edge accommodating recessed groove that opens in the center of a protruding end surface of the elastic fitting portion and extends in the circumferential direction to accommodate the inner circumferential edge of the service hole, and the inner circumferential edge of the service hole is clamped between a pair of elastic clamping pieces that face each other with the inner circumferential edge accommodating recessed groove interposed between the pair of elastic clamping pieces.

On an outer circumferential edge of the closing plate, an elastic fitting portion protruding to the outer side of the inner circumferential edge of the service hole and fitting with the inner circumferential edge projects with a thickness larger than the plate thickness of the closing plate and extends in the circumferential direction of the outer circumferential edge. The elastic fitting portion is provided with an inner circumferential edge accommodating recessed groove that opens in the center of a protruding end surface of the elastic fitting portion and extends in the circumferential direction to accommodate the inner circumferential edge of the service hole, and the inner circumferential edge of the service hole is clamped between a pair of elastic clamping pieces that face each other with the inner circumferential edge accommodating recessed groove interposed between the pair of elastic clamping pieces.

A connector system and method comprising a coupling with 3 walls defining a cavity. Disposed on the first side wall and second side wall are lips protruding into the cavity, such that a grooved board inserted into the cavity is in contact with the lips and back wall. Disposed on the walls are mounting holes, such that other apparatuses may be mounted to the mounting holes. The couplings may be mounted on other identical couplings or on couplings of different heights.

An assembly structure includes multiple first assembly units, wherein each first assembly unit includes a main part and a connecting part; the contour shape of the cross section of each main part is a 6n polygon wherein at least two side edges have unequal lengths, and the opposite side edges of the axial projection of the main part are parallel, n being a positive integer; the connecting part is arranged on each side edge of each of the main parts; the connecting part on each side edge may be in sliding fit connection to the connecting part of an adjacent first assembly unit, and the sliding direction of the connecting part is the same as the extension direction of the side edges where the connecting part is located. The described assembly units of the assembly structure are connected and disassembled by means of sliding fit.

A falsification prevention structure is to prevent falsification of the performance of a turbocharger. A bearing housing of the turbocharger has a flow rate adjustment screw which is operated to adjust a turbine flow rate of the turbocharger. The falsification prevention structure includes a cover member which is fastened to a flange portion of the bearing housing by a fixing bolt and which covers the flow rate adjustment screw, and a cap which is mounted in an irremovable manner with respect to the cover member and which blocks a bolt hole.