Captive fastener assembly
AssigneeTejas Networks Limited
InventorsBabu Rao Khamithar, Basavaraja M
Life of this patent
Estimating the term…
Abstract
A method and device for a captive fastener assembly comprising of a fastener including a head and a shaft, the shaft comprising of a threaded section and an unthreaded section being interposed between the head and the threaded section. A standoff accommodating the fastener permanently fastened to the first surface and enabling the fastener to have an angular and circular motion within the standoff and fastening the first surface with the other surface by placing the surfaces together so that the fastener is substantially aligned with the receiving nut on the other surface for coupling, wherein a marginal offset for the alignment of fastener with the female part of the other surface is allowed.
Claims7
A method for captive fastener assembly for fastening a plurality of surfaces by steps comprising:
- providing a fastener comprising a head and a shaft, the shaft comprising a threaded section and an unthreaded section being interposed between the head and the threaded section;
- providing a standoff on a first surface accommodating the fastener, wherein the standoff has an enlarged hollow internally threaded portion at one end, and a hollow shank portion at another end;
- forming a hole in the first surface and inserting the hollow shank portion of the standoff through the hole so that a rim on a lower part of the enlarged portion of the standoff abuts the first surface;
- forming a distal end of the hollow shank portion on another side of the first surface, wherein the hole is circular at the first surface abutting the rim portion, the distal end of the hollow shank portion is deformed during the forming operation to form a permanent fastening joint such that the deformed part flushes with the other side of the first surface in a frusto-conical shape;
- engaging the threaded section of the shaft of the fastener initially with the enlarged hollow internally threaded portion of the standoff and subsequently engaging the unthreaded portion of the shaft of the fastener with the enlarged hollow internally threaded portion of the standoff to allow free movement of the fastener inside the standoff;
- and
- fastening the first surface with another surface by placing the surfaces together so that the fastener is substantially aligned with a receiving nut on the other surface for coupling, wherein a marginal offset for alignment of the fastener with the receiving nut on the other surface is allowed.
A captive fastener assembly comprising:
- a fastener comprising a head and a shaft, the shaft comprising a threaded section and an unthreaded section being interposed between the head and the threaded section;
- and
- a standoff provided on a first surface accommodating the fastener, wherein the standoff includes an enlarged hollow internally threaded portion at one end, and a hollow shank portion at another end, wherein a distal end of the hollow shank is adapted to deform during a forming operation to form a permanent fastening joint on the first surface such that the deformed part flushes with another side of the first surface in a frusto-conical shape,
- wherein the threaded section of the shaft of the fastener initially engages with the enlarged hollow internally threaded portion of the standoff and the unthreaded portion of the shaft of the fastener subsequently engages with the enlarged hollow internally threaded portion of the standoff to allow free movement of the fastener inside the standoff;
- and
- wherein the first surface when placed with the other surface together for fastening, the fastener is substantially aligned with a receiving nut on the other surface for coupling, wherein a marginal offset for alignment of the fastener with the receiving nut on the other surface is allowed.
Dependencies are inferred from the claim text.