Fastening incorporating a tubular rivet
AssigneeAriel Industries PLC
InventorKenneth Edwards
Life of this patent
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Abstract
A fastening incorporates a tubular rivet (11) passing through an aperture in a workpiece (17, 19). The rivet has a tubular shank (15) which is deformed outwardly to retain the rivet in the aperture, the extent of the deformation being such that the tubular shank is rolled outwardly, for example through an angle greater than 180.degree., forming a toroid in which material which was originally on an inner surface of the tubular shank prior to deformation is on an outer surface of the toroid and able to contact the workpiece (19) and also that material which was originally on an outer surface of the tubular shank prior to deformation is on an inner surface of the toroid and is distant from the workpiece. The deformation is referred to as a "full-roll".
Claims15
A fastening incorporating a tubular rivet passing through aligned apertures in a plurality of superposed workpieces the rivet having a tubular shank and an enlarged head, which shank is deformed outwardly to retain the rivet in the apertures, wherein the tubular shank is rolled outwardly forming a toroid in which material which was originally on an inner surface of the tubular shank prior to deformation is on an outer surface of the toroid and able to contact a surface of one of the workpieces, and material which was originally on an outer surface of the tubular shank prior to deformation is on an inner surface of the toroid and is distant from the workpieces, the toroid engaging the surface of said one workpiece and exerting a residual clamping force between the toroid and the enlarged head due to elastic spring-back of the toroid so as to urge the workpieces together.
A brake assembly comprising a first workpiece in the form of a brake shoe and a second workpiece in the form of a brake lining superposed relative to the brake shoe, the brake shoe and the brake lining having aligned apertures, and a tubular rivet passing through the apertures, the rivet having a tubular shank and an enlarged head, which shank is deformed outwardly to retain the rivet in the apertures, wherein the tubular shank is rolled outwardly forming a toroid in which material which was originally on an inner surface of the tubular shank prior to deformation is on an outer surface of the toroid and able to contact a surface of the brake shoe, and material which was originally on an outer surface of the tubular shank prior to deformation is on an inner surface of the toroid and is distant from the brake shoe, the toroid engaging the surface of the brake shoe and exerting a residual clamping force between the toroid and the enlarged head due to elastic spring-back of the toroid so as to urge the brake lining and brake shoe together.
Dependencies are inferred from the claim text.