Keylocking threaded insert
OwnerGeorge Margelosinventor
Life of this patent
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Abstract
A keylocking threaded insert with an outer cylindrical surface in the form of an external thread adapted to be screwed into a cylindrical bore of a parent part formed from a given material and having an internal thread matching the external thread of the insert. The insert has an unitary body formed by metal particles with a particle size of less than about 20 microns and at least two diametrically located, axially extending locking grooves formed in the external surface and intersecting the external thread.
Claims29
A keylocking threaded insert with an outer cylindrical surface in the form of an external thread adapted to be screwed into a cylindrical bore of a parent part formed from a given material and having an internal thread matching said external thread of said insert, said insert has an unitary body formed by metal particles with a particle size of less than about 20 microns and at least two diametrically located, axially extending locking grooves formed in said external surface and intersecting said external thread.
A method for making a body for a keylocking threaded insert having a given configuration with axial locking grooves, said method comprising:
- (a) mixing metal particles having a particle size of less than 20 microns with a plastic binder;
- (b) forming said mixture into feedstock pellets;
- (c) providing a mold with said configuration;
- (d) injection molding said mixture in said mold to form an enlarged version or green part of said insert;
- (e) heating said version to remove said binder;
- and,
- (f) then heating said version to sinter said particles and reduce said version to the desired size.
A mold for injection molding a body of a keylocking threaded insert, said mold having two closing elements with an inner semi-cylindrical section with matching thread projections defining a continuous mirror image of a cylindrical thread facing a old cavity and abutting radial surfaces defining a parting line, an axially retractable elongated insert intersecting said parting line with profiles defining axial grooves intersecting said cylindrical thread and a rotatable core member concentric with said mirror image and removable from said mold cavity.
Dependencies are inferred from the claim text.