초록 ▼

A sealing fastener, such as a sealing rivet, is disclosed for sealing engagement with a workpiece. The sealing fastener has a head and a shank extending from a lower surface of the head. An aperture passes through the head and shank, and a mandrel and collar fit within the aperture. A sealing member

A sealing fastener, such as a sealing rivet, is disclosed for sealing engagement with a workpiece. The sealing fastener has a head and a shank extending from a lower surface of the head. An aperture passes through the head and shank, and a mandrel and collar fit within the aperture. A sealing member, such as an O-ring is disposed between the collar and the mandrel. The head of the sealing fastener may also have a groove formed therein and may have a sealing member disposed at least in part in the groove. In use, the rivet is placed through an opening in the workpiece, and a lower portion of the shank is collapsed so to form a lower head and so that the upper and lower heads engage the workpiece. The sealing member is compressed between the collar and a wall of the aperture, and the collar and mandrel are placed in locking engagement to maintain the sealing member in a compressed state.

대표청구항 ▼

[ This invention is claimed as follows:] [1.] A fastener, comprising:a fastener head having an upper surface and a lower surface;a shank extending from said lower surface of said fastener head, said shank and said fastener head having an aperture passing therethrough;a collar having a bore passing t

[ This invention is claimed as follows:] [1.] A fastener, comprising:a fastener head having an upper surface and a lower surface;a shank extending from said lower surface of said fastener head, said shank and said fastener head having an aperture passing therethrough;a collar having a bore passing therethrough, said collar being disposed at said upper surface of said fastener head and extending partially into the aperture of said fastener head;a mandrel having an upper end and a lower end, said mandrel extending through at least a portion of said aperture and extending through at least a portion of said bore, said mandrel having a precalculated breaking area and having locking means for mating with said collar, said breaking area being disposed above said locking means and said breaking area being a relatively weakened area whereby when a pull tool applies a tensile stress to said mandrel, said tensile stress required for separation of said mandrel is achieved at said breaking area before said tensile stress causes separation of said mandrel at another area of said mandrel; anda first sealing member disposed between said collar and said mandrel.