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US 2017/0146051 A1Published application
Anti-loosen Screw Manufacturing Method and Screw Member Produced Thereby
OwnerKuo-Chen Hunginventor
Life of this patent
Estimating the term…
Abstract
A screw includes a shank portion, an outer thread portion and a laterally-extruded thread portion. The shank portion has an outer circumferential surface on which to form the outer thread portion having grooves. In a thread-rolling process, the laterally-extruded thread portions is formed by laterally extruding an inclined wall of one groove with respect to a longitudinal direction thereof such that a laterally-extruded portion is protruded in an adjacent groove and is tightly engaged with an inclined surface of a groove of inner threads of a screw hole
Claims14
An anti-loosen screw manufacturing method comprising:
- combining a main die plate with a protruded die plate to form a combined die plate;
- utilizing the main die plate of the combined die plate to execute a thread-rolling process on an outer circumferential surface of a shank portion to form an outer thread portion which includes a plurality of grooves;
- and
- utilizing the protruded die plate of the combined die plate to execute an extrusion-forming process to form at least one or a plurality of laterally-extruded thread portions on a predetermined groove of the outer thread portion in the thread-rolling process;
- wherein each of the laterally-extruded thread portions is formed by laterally extruding a first inclined wall of the predetermined groove of the outer thread portion with respect to a longitudinal direction thereof such that a first laterally-extruded portion is protruded in a first adjacent groove of the predetermined groove;
- and
- wherein the laterally-extruded thread portion widens a width of the predetermined groove such that the first laterally-extruded portion is tightly engaged with a first inclined surface of a first groove of inner threads of a screw hole.
4 more elements
An anti-loosen screw comprising:
- a shank portion provided with an outer circumferential surface;
- an outer thread portion formed on the outer circumferential surface of the shank portion in a thread-rolling process, with the outer thread portion including a plurality of grooves;
- and
- at least one or a plurality of laterally-extruded thread portions formed on a predetermined groove of the outer thread portion in the thread-rolling process;
- wherein each of the laterally-extruded thread portions is formed by laterally extruding a first inclined wall of the predetermined groove of the outer thread portion with respect to a longitudinal direction thereof such that a first laterally-extruded portion is protruded in a first adjacent groove of the predetermined groove;
- and
- wherein the laterally-extruded thread portion widens a width of the predetermined groove such that the first laterally-extruded portion is tightly engaged with a first inclined surface of a first groove of inner threads of a screw hole.
4 more elements
Dependencies are inferred from the claim text.