Grooved nut for blind fastening, rivet and assembly comprising such a nut
AssigneeLisi Aerospace
InventorsLoic Meiffre, Guy Pailhories, Christophe Vandaele
Life of this patent
Estimating the term…
Abstract
A nut (32) for assembling elements of a structure comprises a collar (64) capable of coming into contact with a front face of the structure; a tightening zone having an outer diameter (86) capable of being inserted into a hole of the structure; a deformation zone adjacent to the tightening zone and capable of forming a bulge against a rear face of the structure, opposite the front face; and a tapped portion (65) adjacent to the deformation zone. The nut may include grooving (82) on an outer circumference of at least one part of the deformation zone, a maximum diameter of said grooving (82) being less than or equal to the outer diameter (86) of the tightening zone.
Claims12
A nut for assembling elements of a structure, said nut comprising:
- a collar capable of coming into contact with a front face of the structure;
- a tightening zone having an outer diameter capable of being inserted into a hole of the structure;
- a deformation zone adjacent to the tightening zone and capable of forming a bulge against a rear face of the structure, opposite the front face;
- and
- a tapped portion adjacent to the deformation zone;
- the nut being characterized in that it comprises grooving or ridges on an outer circumference of at least one part of the deformation zone, and in that a maximum diameter of said deformation zone having said grooving or ridges is less than or equal to the outer diameter of the tightening zone, and wherein the grooving extends over the entire outer circumference of a transverse section of the nut in the form of ridges, a radial pitch between two consecutive ridges being less than or equal to 0.25 mm.
Dependencies are inferred from the claim text.