July 7, 2016 - 9:40 PM EDT
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Patent Issued for Wood Screw (USPTO 9377045)

By a News Reporter-Staff News Editor at Journal of Engineering -- Taiwan Shan Yin Int'l Co., Ltd. (Kaohsiung, TW) has been issued patent number 9377045, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.

The patent's inventors are Su, Kou-Tsair (Kaohsiung, TW); Su, Yu-Jung (Kaohsiung, TW).

This patent was filed on March 6, 2015 and was published online on June 28, 2016.

From the background information supplied by the inventors, news correspondents obtained the following quote: "This invention relates to a screw and relates particularly to a wood screw.

"Referring to FIGS. 1 and 2, a conventional wood screw 1 comprises a head 11, a shank 12 extending from the head 11 and a drilling portion 13 disposed on the shank 12, opposite to the head 11. The shank 12 has a plurality of threads 121 spirally disposed thereon. The head 11 includes a top surface 111, a conical bottom surface 112 extending downwards from the top surface 111 and a plurality of ribs 113 disposed at intervals on the conical bottom surface 112. Referring to FIG. 3, when a user directs the drilling portion 13 at a wooden board 2 and rotates the head 11 to bore a hole 21 in the wooden board 2. Then, the thread 121 keeps drilling the shank 12 into the hole 21 until the head 11 touches the wooden board 2 and the ribs 113 cut wood burrs attached to a peripheral edge of the hole 21. Thus, the drilling operation is completed.

"Because the wooden board 2 is formed with resilient wooden fibers, those spaced apart ribs 113 can only lift up the fibrous burrs but cannot cut and scrape off all of the burrs left on the hole 21 effectively. Such burrs incur a protrusion and render the head 11 difficult to be flush with a surface of the board 2. Thus, the fastening effect of the screw 1 cannot go well. Further, the head 11 does not provide a proper space for receiving the burrs cut by the ribs 113. This may stick some burrs out from the head 11 after the screw 1 is screwed into the wooden board 2. Thus, the screw 1 cannot achieve a good fastening effect."

Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "It is an object of this invention to provide a wood screw which effectively cuts and scrapes off burrs attached to the peripheral edge of the drilled hole, provides a space enough to accommodate the cut burrs and prevent the burrs from sticking out from the head after the screwing action is done, and allows the head to fit level with the surface of the wooden board tightly for achieving a better fastening effect.

"The wood screw in accordance with this invention comprises a head, a shank extending from the head, a drilling portion disposed at one end of the shank and a plurality of threads spirally disposed on the shank. The head includes a top surface and a conical bottom surface extending downwards from the top surface. The head further includes a plurality of cutting areas spaced from each other on the conical bottom surface and a smooth area defined between any two adjacent cutting areas. A surface of each smooth area is the same as the conical bottom surface. Each of the cutting areas has at least two grooves, each of which has abase different from the smooth area and two rib walls protruding from the base. The rib walls of two adjacent grooves meet to form a first cutting edge. Each of the cutting areas further has two outer walls, each of which protrudes from the surface of the smooth area. The outer wall and one of the rib walls of the groove which is adjacent to the outer wall meet to form a second cutting edge. Accordingly, wood burrs left on a peripheral edge of a drilled hole are effectively and continuously cut and scraped off by the cutting edges and then accommodated in the grooves. Therefore, the burrs do not stick out from the head after the screwing action is done. The head can be tightly flush with the surface of the wooden board to enhance the fastening effect.

"Preferably, the base of the cutting area is in a protruding manner relative to the conical bottom surface so that the cutting areas can protrude from the conical bottom surface radially.

"Preferably, a thread-free section can be defined on the shank between the threads and the head to help connect two wooden boards together.

"Preferably, a reaming section can be defined on the shank between the threads and the thread-free section. The reaming section has helical units spirally defined between the thread-free section and the threads in order to help scrape off the burrs attached to the inner wall of the board and reduce the drilling resistance. A spiral angle of the helical units inclined with respect to a shank axis is smaller than a spiral angle of the threads inclined with respect to the shank axis.

"The advantages of the present invention over the known prior arts are more apparent to those of ordinary skilled in the art upon reading following descriptions in conjunction with the accompanying drawings."

For the URL and additional information on this patent, see: Su, Kou-Tsair; Su, Yu-Jung. Wood Screw. U.S. Patent Number 9377045, filed March 6, 2015, and published online on June 28, 2016. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9377045.PN.&OS=PN/9377045RS=PN/9377045

Keywords for this news article include: Taiwan Shan Yin Int'l Co. Ltd.

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Source: Equities.com News (July 7, 2016 - 9:40 PM EDT)

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