Screw structure
AssigneeIntegral Building Products Incorporation
InventorLI-CHING HSIAO
Life of this patent
Estimating the term…
Abstract
The present invention relates to a screw structure, including a head part, a rod part, a first thread and a second thread. The head part is arranged at one end of the rod part. The other end of the rod part is opposite to the head part to form a tapered tap-lock screw-in end. The first thread is arranged on the surface of the rod part with a clockwise spiral ring and extends to the tap-lock screw-in end. The second thread is arranged on the surface of the tap-lock screw-in end with a counterclockwise spiral ring. The crest height of the second thread is lower than 50% of the crest height of the first thread, and several teeth are formed on the second thread. Accordingly, through the setting of the second thread, the screw has multiple functions such as crushing and chip removal.
Claims6
A screw structure, comprising:
- a head part, a rod part, a first thread, and a second thread;
- wherein the head part is arranged at one end of the rod part, wherein the rod part forms a tapered tap-lock screw-in end at the other end opposite to the head part, wherein in the position of the rod part adjacent to the head part, the first thread is arranged on the surface of the rod part in a clockwise spiral ring and extends to the tap-lock screw-in end, wherein the second thread is arranged on the surface of the tap-lock screw-in end with a counterclockwise spiral ring, and the second thread includes several teeth arranged thereon.
Dependencies are inferred from the claim text.