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US 2011/0299958 A1Published application
Anti-loosen self-tapping screw
OwnerRichard LEEinventor
Life of this patent
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Abstract
The anti-loosen self-tapping screw includes a head, rod and a thread. The rod extends from the head and an end of the rod forms a conic tapping tip. The thread is around the rod from the tapping tip to a position near the head. The thread is provided with an axial groove to cut off the thread. The divided ends along one side of the groove are separately provided with expanded portions whose cross-sections are expanded.
Claims9
An anti-loosen self-tapping screw comprising:
- a head,
- a rod extending from the head, wherein an end of the rod forms a conic tapping tip;
- and
- a thread around the rod from the tapping tip to a position near the head;
- wherein the thread is provided with an axial groove to cut off the thread, divided ends of the thread along one side of the groove are separately provided with expanded portions whose cross-sections are expanded.
2 more elements
Dependencies are inferred from the claim text.