Self-tapping, self-aligning thread repair insert
AssigneesDavid Diperstein, Groov-Pin Corporation
InventorsDavid Diperstein, Joseph D. Pagliuca
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Abstract
A self-tapping, self-aligning thread repair insert is disclosed. The insert is an annular sleeve having a threaded interior surface, a partially threaded exterior surface, and an opening. The exterior surface has a tapered portion between a straight threaded portion and a straight thread-free portion. The thread-free portion and the opening are adjacent an end of the sleeve. The thread-free portion is free of threads for a distance of at least 1.5 thread widths from the end of the sleeve. The sleeve is made of a 400 series stainless steel. The sleeve is case hardened.
Claims11
A self-aligning thread insert comprises:
- an annular sleeve having a wall and a threaded interior surface, a partially threaded exterior surface, and a radial opening through said sleeve wall;
- said exterior surface having a tapered threaded portion between a straight threaded portion and a straight non-tapered thread-free portion, said opening extending axially through said tapered threaded portion to provide a cutting means;
- said thread-free portion and said opening being adjacent an end of said sleeve;
- said thread-free portion being free of threads for a distance of at least 1.5 thread widths from said end of said sleeve and engaging and aligning said sleeve in a bore.
A self-aligning thread insert comprises:
- a sleeve having a wall and a threaded interior surface, a straight threaded exterior surface, a tapered exterior threaded surface and a straight non-tapered thread-free surface;
- said tapered exterior being located between said threaded and said thread-free portions, and said thread-free portions being adjacent an end of said sleeve and having a length of at least 1.5 thread widths and engaging and aligning said sleeve in a bore;
- and
- a cutting means being a radial opening through said sleeve wall and located through the tapered surface.
Dependencies are inferred from the claim text.