Pin with breakneck groove, fastener comprising such a pin, related assembly and installation method
AssigneeLisi Aerospace
InventorJérôme Couderc
Life of this patent
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Abstract
This invention relates to a pin comprising a head (22) and a threaded portion, an end of the head forming an end surface (32) on a first plane perpendicular to the main axis. The pin further comprises a handling component (30) which is an integral part of the head, a junction (50) between that head and the handling component comprising a breakneck groove (52) with a rotational shape. A section of the breakneck groove has an arc of circle portion (60), a center (68) of that circle primarily in the first plane, so that a plane containing the breakneck groove (52) surface clearly coincides with the first plane.
Claims12
A pin extends along a main axis and comprising a head and a threaded portion, an end of the head opposite to the threaded portion forming an end surface in a first plane perpendicular to the main axis,
- the pin further comprises a handling component which is an integral part of the head opposite the threaded portion, a junction between that head and the handling component comprising a breakneck groove configured to break under a torsional stress greater than a predetermined threshold, said breakneck groove having substantially a shape of revolution around the main axis,
- characterized in that, in a second plane comprising the main axis, a section of the breakneck groove has an arc of circle portion, a center of said circle being substantially set in the first plane, so that a plane containing a breakneck groove surface substantially coincides with the first plane.
A pin extends along a main axis and comprising a head and a threaded portion, an end of the head opposite to the threaded portion forming an end surface in a first plane perpendicular to the main axis,
- the pin further comprises a handling component which is an integral part of the head opposite the threaded portion, a junction between that head and the handling component comprising a breakneck groove configured to break under a torsional stress greater than a predetermined threshold, said breakneck groove having substantially a shape of revolution around the main axis,
- characterized in that, in a second plane comprising the main axis, a section of the breakneck groove has an arc of circle portion, a center of said circle being substantially set in the first plane, wherein the arc of circle portion comprises a first part and a second part arranged on the first plane on either side of the head and handling component respectively, said first part forming a cavity in the head in relation to the first end surface.
A pin extends along a main axis and comprising a head and a threaded portion, an end of the head opposite to the threaded portion forming an end surface in a first plane perpendicular to the main axis,
- the pin further comprises a handling component which is an integral part of the head opposite the threaded portion, a junction between that head and the handling component comprising a breakneck groove configured to break under a torsional stress greater than a predetermined threshold, said breakneck groove having substantially a shape of revolution around the main axis,
- characterized in that, in a second plane comprising the main axis, a section of the breakneck groove has an arc of circle portion, wherein the breakneck groove has a first lip and a second lip tangential to the arc of circle portion and substantially tapered, said first and second lips being respectively arranged on the head and on the handling component whereby the first lip has at least a portion on a side of the first plane opposite the second lip.
Dependencies are inferred from the claim text.