Screw having a head with different sockets

A screw comprising a head including a first surface and a second surface in opposing relationship to said first surface, said screw further comprising a threaded shank extending axially from said second surface, said head defining a central axis passing through a center of said first surface, a Pozi-type socket being recessedly formed in said first surface and having four groove portions and four indentations each formed between every two adjacent groove portions, each of said groove portions including opposite side walls and an end wall connected to said side walls, said end wall sloping from said first surface inwardly towards said central axis;

• wherein a drive socket is formed in said first surface and communicates with said Pozi-type socket, said drive socket including a plurality of rounded portions, a plurality of arched portions alternating with said plurality of rounded portions, and a conical portion connected to said plurality of rounded portions and said plurality of arched portions and tapering to an end of said head to form a conical point, each of said rounded portions being situated between every two adjacent groove portions, said central axis passing through said conical point, a second room being enclosed by said conical portion, a first room being enclosed by said plurality of rounded portions and said plurality of arched portions and defined between said second room and said first surface, said first room communicating with said second room, said conical portion and said plurality of rounded portions meeting at a first reference point from which a first reference line is defined, said conical portion and said plurality of arched portions meeting at a second reference point from which a second reference line is defined, said first reference line and said second reference line being parallel to said central axis, each of said plurality of rounded portions being inclined outwardly from said first reference line by a first slope angle, each of said plurality of arched portions being inclined outwardly from said second reference line by a second slope angle, and said first room thereby increasing gradually towards said first surface.

A screw comprising a head including a first surface and a second surface in opposing relationship to said first surface, said screw further comprising a threaded shank extending axially from said second surface, said head defining a central axis passing through a center of said first surface, a Pozi-type socket being recessedly formed in said first surface and having four groove portions and four indentations each formed between every two adjacent groove portions, each of said groove portions including opposite side walls and an end wall connected to said side walls, said end wall sloping from said first surface inwardly towards said central axis, wherein a first interface between said end wall and said first surface is an arcuate structure;

• wherein a drive socket is formed in said first surface and communicates with said Pozi-type socket, said drive socket including a plurality of rounded portions, a plurality of arched portions alternating with said plurality of rounded portions, and a conical portion connected to said plurality of rounded portions and said plurality of arched portions, wherein each of said plurality of arched portions is directly connected with a corresponding end wall, and a second interface between each of said plurality of arched portions and the respective end wall is an arcuate structure extending in a direction parallel to the central axis, wherein each of said plurality of arched portions is also directly connected to a corresponding one of said rounded portions, said conical portion tapering to an end of said head to form a conical point, said central axis passing through said conical point, a second room being enclosed by said conical portion, a first room being enclosed by said plurality of rounded portions and said plurality of arched portions and defined between said second room and said first surface, said first room communicating with said second room, said conical portion and said plurality of rounded portions meeting at a first reference point from which a first reference line is defined, said conical portion and said plurality of arched portions meeting at a second reference point from which a second reference line is defined, said first reference line and said second reference line being parallel to said central axis, each of said plurality of rounded portions being inclined outwardly from said first reference line by a first slope angle, each of said plurality of arched portions being inclined outwardly from said second reference line by a second slope angle, and said first room thereby increasing gradually towards said first surface.