Patent Number: 6,254,327

Title: Screw with spiral triangular threads

Abstract: A screw comprising a shank having an upper portion formed with spiral circular threads and a lower portion formed with spiral triangular threads, each of said spiral triangular threads having three sharp edges and three pointed tips, said pointed tips of said spiral triangular threads being located at different positions, whereby the screw can be easily and rapidly turned into a piece of hard wood.

Inventors: Chen; Chun-Chin (Taipei, TW)

Assignee: Chun Chen Screw Co., Ltd.

International Classification: F16B 25/00 (20060101); F16B 33/00 (20060101); F16B 33/02 (20060101); F16B 035/04 ()

Expiration Date: 07/03/2018