Thread repair insert
OwnerGary Jack Reedinventor
Life of this patent
Estimating the term…
Abstract
An insert for thread repair having an interior thread and a specially formed exterior thread which both precludes upheaval between sides of the cracked material on opposite sides of the crack and draws the crack together, radially inward towards the center of the insert. The insert may include a driving head, either solid or having a central hollow and may include a frangible neck to dissociate the head from the insert.
Claims32
A thread repair insert comprising in combination:
- a sleeve having an interior thread and an exterior thread adapted to be threaded into a hole having a thread pitch complemental to said exterior thread and
- said exterior thread including means to direct a force on said thread pitch radially inward towards an axially longitudinal center line of said sleeve.
A device for receiving a threaded fastener, said device comprising in combination:
- a head including means for coupling to a torque-applying instrumentality;
- a sleeve extending from said head and including interior threads and exterior threads;
- said exterior threads of said sleeve adapted to be received within a threaded hole having threads substantially complemental in form to said exterior threads, and
- said interior threads adapted to receive the threaded fastener.
A thread repair insert for repairing a cracked threaded hole in a material, the crack is defined as a gap passing through a portion of the threaded hole to define at least two sides of the threaded hole separated from each other, said thread repair insert comprising in combination:
- means to draw the sides of the crack together located on an outer surface of said insert;
- means to preclude disengagement of said thread repair insert from the threaded hole located at a longitudinal extremity of said insert;
- and
- means for receiving a threaded fastener within an interior of said thread repair insert wherein said insert strengthens and seals the cracked threaded hole to a level which effectively allows the fastener to be rigidly retained therein.
A method for repairing a cracked threaded hole in a material to receive a fastener therein, including the steps of:
- providing a thread repair insert including a sleeve having an exterior thread and an interior thread, a driving head, and a shoulder interposed between the sleeve and the driving head, the shoulder having a portion of greater width than the cracked threaded hole;
- forming a thread within the hole which is substantially complemental to the exterior thread of the thread repair insert;
- and
- threading the thread repair insert into the hole to coact with hole threads formed in said forming step to force opposite sides of the crack toward each other.
A method for repairing a crack passing about a hole which heretofore supported a member, including the steps of:
- oversizing the hole from a first diameter once capable of receiving the member to a second, greater diameter;
- forming threads into the second, greater diameter hole;
- fabricating a thread repair insert including forming a sleeve having exterior threads and a thickness for re-sizing the hole from the second greater diameter to the first diameter;
- threading the insert into the second, greater diameter hole, and receiving the member into the sleeve.
Dependencies are inferred from the claim text.