US 12,305,679 B2
Screw nail
Eiichi Watanabe, Tokyo (JP); and Ryuta Kurasawa, Tokyo (JP)
Assigned to Max Co., Ltd., Tokyo (JP)
Filed by MAX CO., LTD., Tokyo (JP)
Filed on Jan. 9, 2023, as Appl. No. 18/094,641.
Claims priority of application No. 2022-003587 (JP), filed on Jan. 13, 2022.
Prior Publication US 2023/0220865 A1, Jul. 13, 2023
Int. Cl. F16B 35/00 (2006.01); F16B 15/02 (2006.01); F16B 15/06 (2006.01)
CPC F16B 15/02 (2013.01) [F16B 15/06 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A screw nail, comprising:
a nail shaft portion extending along one direction; and
a head portion, the diameter of the head portion being enlarged along other direction orthogonal to an extension direction of the nail shaft portion,
wherein a sharp tip end portion is formed on one end side of the nail shaft portion along the extension direction, and the head portion is formed at an end portion on the other end side,
wherein the nail shaft portion is formed with a screw thread between the tip end portion and the head portion, and the head portion is formed with an engaging portion capable of engaging with a rotary tool,
wherein a convex portion protruding along an axis direction of the nail shaft portion is formed on an end surface of the head portion on an opposite side to a side from which the nail shaft portion protrudes,
wherein a concave portion that is concave with respect to the convex portion along the axis direction of the nail shaft portion is formed between the convex portion and the engaging portion and wherein the concave portion is formed outside the convex portion with respect to a radial direction of the head portion, and
wherein a virtual plane specified by vertexes of the convex portion is a plane orthogonal to the axis direction of the nail shaft portion.