An optimized thread profile (140) for joining composite materials is presented. This thread profile (140) maintains a certain material strength when used as part of a composite threaded joint (101). The thread profile (140) comprises a repeating pattern of four components: a crest region (150), a first flank (162), a root region (170) and a second flank (164). The thread profile (140) is symmetrical, that is, the dimensions of the four components do not change throughout the length of the thread profile. The crest (152) has a flat profile and the root (172) has a rounded profile. When a shaft (120) is affixed to a joining shaft (110) using this optimized thread profile (140), the flat profiles of the crest (152) of the shaft (120) and corresponding rounded profiles of the root (172) of the joining shaft (110) create a gap to accommodate a substance such as an adhesive or a lubricant. Similarly, the flat profiles of the crest (152) of the joining shaft (110) and corresponding rounded profiles of the root (172) of the shaft (120) create a gap to accommodate a substance.

An optimized thread profile (140) for joining composite materials is presented. This thread profile (140) maintains a certain material strength when used as part of a composite threaded joint (101). The thread profile (140) comprises a repeating pattern of four components: a crest region (150), a first flank (162), a root region (170) and a second flank (164). The thread profile (140) is symmetrical, that is, the dimensions of the four components do not change throughout the length of the thread profile. The crest (152) has a flat profile and the root (172) has a rounded profile. When a shaft (120) is affixed to a joining shaft (110) using this optimized thread profile (140), the flat profiles of the crest (152) of the shaft (120) and corresponding rounded profiles of the root (172) of the joining shaft (110) create a gap to accommodate a substance such as an adhesive or a lubricant. Similarly, the flat profiles of the crest (152) of the joining shaft (110) and corresponding rounded profiles of the root (172) of the shaft (120) create a gap to accommodate a substance.

An anti-tampering device includes a housing with a bolt channel and a lock channel. The lock channel is aligned with, intersects and is perpendicular to the bolt channel. A head of a bolt and a portion of a shank of a bolt is received in the bolt channel. A lock received in the lock channel extends into the bolt channel, in proximity to the shank of the bolt, when the lock is in a locked position. The portion of the lock extending into the bolt channel prevents removal of the head of the bolt from the bolt channel.

A hung structure is provided. The hung structure is adapted to be hung on a fastener. The hung structure includes a hung member and a restriction member. The hung member includes an opening, wherein the opening includes an insertion area and a first slot area, the fastener is adapted to pass through the opening via the insertion area, the fastener is adapted to slide from the insertion area to the first slot area, and when the fastener is in the first slot area, the hung member is supported by the fastener. The restriction member includes an affixed section, an elastic unit and a restriction section. The affixed section is affixed to the hung member. The elastic unit is connected to the affixed section. The restriction section is connected to the elastic unit, wherein the restriction section corresponds to the insertion area.

A washer with integrated fluid distribution which includes a body with an outer ring having an aperture located centrally within the ring, a channel enclosed within the outer ring and a release channel exit in fluid communication with the aperture and an interior surface of the channel. The channel is filled with a dispensing fluid and the release channel is reversibly closed. The release channel exit is located within an inner wall of the aperture. The body comprises a compressible material. The release channel exit is opened when pressure is applied to the washer body and the dispensing fluid exits the channel via the opened release channel exit.

A tamper resistant assembly applied to a tamper resistant system includes a tamper resistant screw, a housing, a lock member, a nut and a cover. The tamper resistant screw includes a head, a thread, a groove and a tip. The lock member is disposed in the housing. The lock member includes a plurality of locking blocks, wherein a deformable opening is formed between the locking blocks. The nut is disposed in the housing and covers the deformable opening. The cover is disposed in the housing. The nut is located between the lock member and the cover. When the tip of the tamper resistant screw passes through the cover and the nut sequentially and enters the deformable opening, the nut is separated from the deformable opening and the locking blocks engage with the groove. Furthermore, a detaching tool is provided to detach the tamper resistant assembly.

A tamper resistant assembly applied to a tamper resistant system includes a tamper resistant screw, a housing, a lock member, a nut and a cover. The tamper resistant screw includes a head, a thread, a groove and a tip. The lock member is disposed in the housing. The lock member includes a plurality of locking blocks, wherein a deformable opening is formed between the locking blocks. The nut is disposed in the housing and covers the deformable opening. The cover is disposed in the housing. The nut is located between the lock member and the cover. When the tip of the tamper resistant screw passes through the cover and the nut sequentially and enters the deformable opening, the nut is separated from the deformable opening and the locking blocks engage with the groove. Furthermore, a detaching tool is provided to detach the tamper resistant assembly.

A device for injecting a fluid into a mechanical system that may undergo heating, comprising at least one body containing a thermally triggered charge generating combustion gas, ignition of the charge being able to be triggered under the action of an ignition command and/or under the effect of a heat contribution, from a heating area of the body toward the charge, a reservoir containing the fluid, means for fastening the device to the mechanical system, the fastening means adapted to put the reservoir in fluid communication with the mechanical system, and means for delivering pressurized fluid outside the reservoir through the action, directly or through intermediate means, of the combustion gases. Within the device, the fastening means comprise at least one injection sleeve provided with an outer thread coated with an anti-loosening adhesive film. The invention also relates to a mechanical system equipped with at least one such device.

A tamper resistant assembly applied to a tamper resistant system includes a tamper resistant screw, a housing, a lock member, a nut and a cover. The tamper resistant screw includes a head, a thread, a groove and a tip. The lock member is disposed in the housing. The lock member includes a plurality of locking blocks, wherein a deformable opening is formed between the locking blocks. The nut is disposed in the housing and covers the deformable opening. The cover is disposed in the housing. The nut is located between the lock member and the cover. When the tip of the tamper resistant screw passes through the cover and the nut sequentially and enters the deformable opening, the nut is separated from the deformable opening and the locking blocks engage with the groove. Furthermore, a detaching tool is provided to detach the tamper resistant assembly.

A tamper resistant assembly applied to a tamper resistant system includes a tamper resistant screw, a housing, a lock member, a nut and a cover. The tamper resistant screw includes a head, a thread, a groove and a tip. The lock member is disposed in the housing. The lock member includes a plurality of locking blocks, wherein a deformable opening is formed between the locking blocks. The nut is disposed in the housing and covers the deformable opening. The cover is disposed in the housing. The nut is located between the lock member and the cover. When the tip of the tamper resistant screw passes through the cover and the nut sequentially and enters the deformable opening, the nut is separated from the deformable opening and the locking blocks engage with the groove. Furthermore, a detaching tool is provided to detach the tamper resistant assembly.