Back to results
US 2020/0049185 A1Published application
Flush-break blind fastener
AssigneeMonogram Aerospace Fasteners, Inc.
InventorJerry Quaresma
Life of this patent
Estimating the term…
Abstract
The fastener includes a bolt, a nut, a sleeve, and a drive nut. The drive nut interfaces with the nut. The bolt is disposed through the nut, sleeve, and drive nut. The bolt comprises one or more threaded portions and a non-threaded portion. The fastener breaks-off at the non-threaded portion during installation. The installed fastener comprises a recess-free, flush surface with a workpiece.
Claims19
A fastener comprising:
- a nut comprising a body, a first end, and a second end, wherein the body comprises an internally threaded bore having a first diameter, and the second end comprises a head comprising a wrenching surface, and a bore comprising a second diameter, wherein the first diameter is different from the second diameter;
- a bolt comprising a bolt head, a first threaded portion, a second threaded portion, and a non-threaded portion, wherein the non-threaded portion is disposed between the first threaded portion and the second threaded portion, and wherein the first threaded portion comprises different dimensions than the second threaded portion;
- and
- a sleeve disposed between the bolt head and the nut;
- wherein the bolt passes through the sleeve and the nut.
2 more elements
A fastener comprising:
- a nut, a bolt, a sleeve, and a drive nut, wherein the drive nut comprises a knurled surface that interfaces with the nut,
- wherein the drive nut comprises a stop feature that prevents the bolt from advancing beyond a predetermined position, and
- wherein the bolt comprises a non-threaded portion that is operatively exposed during installation.
The fastener of claim 13, wherein the engaging surface is free of recesses or protrusions.
A method comprising:
- a blind fastener comprising a bolt, the bolt comprising a first threaded portion, a second threaded portion, and a non-threaded portion, wherein the non-threaded portion is disposed between the first threaded portion and the second threaded portion, and wherein the first threaded portion comprises different dimensions than the second threaded portion;
- breaking off the bolt when the non-threaded portion is exposed;
- and
- wherein the installed fastener after breaking off the bolt comprises a recess-free, flush surface.
1 more element
Dependencies are inferred from the claim text.