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US 2017/0284447 A1Published application
Screw-type fastener
AssigneeThe Hillman Group, Inc.
InventorsMichael K. Falkenstein, Farhad Lajewardi
Life of this patent
Estimating the term…
Abstract
A screw includes at least one helical thread with a peripheral edge having notched regions spaced apart by notch-free regions. An underside of a head of the screw includes projecting nibs.
Claims26
A screw, comprising:
- a head end, a shank and a tapered end,
- the head end including a tool engaging part, the head end located at one end of the shank and the tapered end located at an opposite end of the shank,
- wherein at least one thread is formed along the shank including:
- a primary thread that begins on the tapered end, extends onto the shank and terminates at a set location short of the head end, the primary thread being a right-hand thread and having a peripheral edge, at least a first helical portion of the peripheral edge includes a plurality of notch regions spaced apart from each other by respective notch-free regions, each notch region (i) extending helically through between two-hundred 280 circumferential degrees and three-hundred and twenty circumferential degrees and (ii) including a plurality of spaced notches formed in the peripheral edge, and each notch-free region extending helically through between about forty circumferential degrees and about eighty circumferential degrees and lacking any notches.
1 more element
A screw, comprising:
- a head end, a shank and a tapered end,
- the head end including a tool engaging part, the head end located at one end of the shank and the tapered end located at an opposite end of the shank,
- wherein at least one thread is formed along the shank including:
- a primary thread that begins on the tapered end, extends onto the shank and terminates at a set location short of the head end, the primary thread being a right-hand thread and having a peripheral edge, at least a first helical portion of the peripheral edge includes a plurality of notch regions spaced apart from each other by respective notch-free regions, each notch region extending helically and including a plurality of spaced notches formed in the peripheral edge where a center-to-center circumferential spacing between the notches is no more than about thirty-five circumferential degrees, and each notch-free region extends helically through at least about forty circumferential degrees.
1 more element
A screw, comprising:
- a head end, a shank and a tapered end,
- the head end including a tool engaging part, the head end located at one end of the shank and the tapered end located at an opposite end of the shank,
- at least one helical thread is formed along the shank;
- wherein the head end includes a first frustoconical part tapering in a direction from the tool engaging part toward the shank at a first angle relative to a center axis of the screw, a second frustoconical part tapering from the first frustoconical part to the shank at a second angle relative to the center axis, at least the first frustoconical part including a plurality of outwardly protruding spaced apart nibs, each nib having a first end toward the tool engaging part and extending toward the shank to a second end, each nib having opposite sides and a joining surface that is a segment of a common frustoconical shape, the frustonical shape defining a third angle relative to the center axis, the third angle being less than the first angle but greater than the second angle.
1 more element
A screw, comprising:
- a head at one end, a point at an opposite end and a shank extending between the head and the point,
- at least one helical thread is formed along the shank;
- wherein the head includes a frustoconical part tapering in a direction from the face of the head toward the shank at a first angle relative to a center axis of the screw, an underside of the head includes a plurality of outwardly protruding spaced apart nibs along the frustoconical part, each nib having a first end toward the face, each nib extending both axially and radially toward the shank to a second end, each nib having opposite sides and a joining surface that is a segment of a common frustoconical shape, the frustonical shape defining a second angle relative to the center axis, the second angle less than the first angle.
Dependencies are inferred from the claim text.