An explosive bolt is provided for securing a brace in tension. The bolt includes a bar, a pair of explosives, a pair of detonators and a pair of anchors. The bar has opposing longitudinal ends and an outer thickness. Opposing bores extend inwardly from the longitudinal ends to corresponding depth ends. First and second notches reduce the thickness proximate to the corresponding depth ends. A center rod separates the notches from each other. Each explosive correspondingly inserts into a corresponding bore to a corresponding depth end. Each detonator correspondingly inserts into the corresponding bore. Each anchor secures the bar to the brace. In further embodiments, the longitudinal ends include helical male threads, and the anchors are nuts having helical female threads.

A blow-by gas treatment device for an internal combustion engine includes: a positive crankcase ventilation (PCV) separator configured to be fastened to the internal combustion engine with a plurality of bolts; and one of a single sealant or a plurality of sealants configured to seal gas leakage of blow-by gas from a gap between the internal combustion engine and the PCV separator; wherein the plurality of bolts includes at least one break head bolt and three or more unbreakable head bolts, the unbreakable head bolt being a bolt in which a bolt head is not separated even when a fastening torque corresponding to a tightening torque applied to the break head bolt is applied to the bolt head.

A blow-by gas treatment device for an internal combustion engine includes: a positive crankcase ventilation (PCV) separator configured to be fastened to the internal combustion engine with a plurality of bolts; and one of a single sealant or a plurality of sealants configured to seal gas leakage of blow-by gas from a gap between the internal combustion engine and the PCV separator; wherein the plurality of bolts includes at least one break head bolt and three or more unbreakable head bolts, the unbreakable head bolt being a bolt in which a bolt head is not separated even when a fastening torque corresponding to a tightening torque applied to the break head bolt is applied to the bolt head.

The invention relates to a separation device for a spacecraft or launcher. The separation device includes an inner housing divided into at least two portions locked to each other by a locking device in a locking position. The locking device is arranged to move between a locking position and a releasing position. The separation device includes an initiator including means for providing high pressure fluid to an expansion chamber when the separation device is switched from a locked state to a released state. The high pressure fluid in an expansion chamber moves the locking device from the locking position to the releasing position when the separation device is switched from the locked state to the released state. The separation device comprises a dampening arrangement arranged to attenuate a peak load when the separation device is switched from the locked state to the released state.

A thermally stabilized fastener system and method is disclosed. The disclosed system/method integrates a fastener (FAS) incorporating a faster retention head (FRH), fastener retention body (FRB), and fastener retention tip (FRT) to couple a mechanical member stack (MMS) in a thermally stabilized fashion using a fastener retention receiver (FRR). The MMS includes a temperature compensating member (TCM), a first retention member (FRM), and an optional second retention member (SRM). The TCM is constructed using a tailored thermal expansion coefficient (TTC) that permits the TCM to compensate for the thermal expansion characteristics of the FAS, FRM, and SRM such that the force applied by the FRH and FRR portions of the FAS to the MMS is tailored to a specific temperature force profile (TFP) over changes in MMS/FAS temperature. The TCM may be selected with a TTC to achieve a uniform TFP over changes in MMS/FAS temperature.

A trim panel assembly includes a trim panel configured to be removably connected to a pillar of a vehicle body structure. A connecting member includes a first part connected to the trim panel and a second part configured to be connected to the pillar. The first part is configured to be separable from the second part. A fastening member js connected between the first and second parts of the connecting member to limit a separation distance of the trim panel when the first part separates from the second part.

Workpieces that generate pressure by an extrusion media (6, 6a) and are deformed in this way for the secure connection of components (7, 8). In particular, an extrusion billet which comprises an extrudable material or material mixture in the interior thereof, which can be reversibly compressed by a compression die (4) penetrating into the material, such that billet can expand in diameter by increasing the internal pressure in the billet, which leads to a very secure, but reversible press fitting of the different types of components to be connected, in particular of shaft-hub connections for mechanical engineering.

Disclosed is a manual adjustable tensioning device. Slope guide slots are formed in the periphery of a lead screw nut, and contacts are provided with slopes having the same angles and placed in the guide slots of the lead screw nut; two ends of a lead screw are respectively supported in threaded holes of a shell and an end cover; screws are connected to the lead screw nut via threaded holes, the tail end of each screw is in contact with one end of a lever, the other end of the lever is in contact with the slope of the lead screw nut, a roller is mounted at the tail end of the lever, and an extension spring is mounted at the end of the slope of the lead screw nut.

A thermally stabilized fastener system and method is disclosed. The disclosed system/method integrates a fastener (FAS) incorporating a faster retention head (FRH), fastener retention body (FRB), and fastener retention tip (FRT) to couple a mechanical member stack (MMS) in a thermally stabilized fashion using a fastener retention receiver (FRR). The MMS includes a temperature compensating member (TCM), a first retention member (FRM), and an optional second retention member (SRM). The TCM is constructed using a tailored thermal expansion coefficient (TTC) that permits the TCM to compensate for the thermal expansion characteristics of the FAS, FRM, and SRM such that the force applied by the FRH and FRR portions of the FAS to the MMS is tailored to a specific temperature force profile (TFP) over changes in MMS/FAS temperature. The TCM may be selected with a TTC to achieve a uniform TFP over changes in MMS/FAS temperature.

A low-shock separation device is characterized in that an internal locking structure is unlocked and a bolt is separated by operating a specific part of components thereof using high pressure that is generated by combustion of powder.