Screw for coupling wooden members together
AssigneeSaehan Electronics, Co.
InventorYoung-Kuuk BAN
Life of this patent
Estimating the term…
Abstract
There is provided a screw for fastening a wooden member which includes: a shank that extends along a datum line; a head that is disposed at an end of the shank and has a plate portion having a cross-section that narrows as it goes to the shank such that the boundary of the cross-section and the datum line make a plate angle; and a tapered blade that protrudes from the outer side of the plate portion, has a bottom perpendicular to the datum line and a side making an obtuse angle with the bottom, and has a taper angle that is made by the side and the datum line and is 2.50° to 12.5° smaller than the plate angle.
Claims20
A screw for fastening a wooden member, comprising:
- a shank extending along a datum line;
- a head disposed at an end of the shank and having a plate portion having a cross-section that narrows as it goes to the shank such that the boundary of the cross-section and the datum line make a plate angle;
- and
- a tapered blade protruding from the outer side of the plate portion, having a bottom that is perpendicular to the datum line and a side that makes an obtuse angle with the bottom, and having a taper angle that is made by the side and the datum line and is 2.5° to 12.5° smaller than the plate angle.
A screw for fastening a wooden member, comprising:
- a shank extending along a datum line and having a threaded portion with a thread thereon and an end blade formed at one end;
- a head disposed at the other end of the shank and having a plate portion, which has a cross-section that narrows as it goes to the shank such that the boundary of the cross-section and the datum line make a plate angle, and a disc portion at a free end of the plate portion;
- a tape red blade protruding from the outer side of the plate portion, having a bottom that is perpendicular to the datum line and a side that makes an obtuse angle with the bottom, and having a tapered angle smaller than the plate angle;
- a horizontal blade protruding from the bottom of the disc portion and having a side parallel with the bottom of the tapered blade;
- and
- a circular blade protruding from the bottom of the disc portion and surrounding the tapered blade and the horizontal blade.
Dependencies are inferred from the claim text.