Granted Patent B2

US 12,650,142 · App. 18/965,637 · Granted Jun 9, 2026

Inventor: Boyd J. Smith (Xenia, OH)

Assignee: All State Fastener Corporation

F16B25/0021F16B25/0063

Abstract

Claims (16)

1 . A system comprising:

a flooring substrate having an upper layer and a lower layer with a hollow core disposed between the upper and lower layers, wherein an unsupported drilling depth is defined between an upper surface of the upper layer and an upper surface of the lower layer;

a support substrate supporting the flooring substrate; and

a fastener engaging the flooring substrate to the support substrate, the fastener comprising:

a head portion for receiving a screw driver configured to rotate the fastener about an axis of the fastener; and

a shank portion extending along the axis from the head portion to a distal end configured to pierce through the flooring substrate and the support substrate, the shank portion having (i) a threaded section between the distal end and the head portion, and (ii) an unthreaded section between the distal end and the threaded section,

wherein the threaded section has an outer threaded edge extending helically along the shank portion; and

wherein the unthreaded section has a length along the axis of the fastener that is at least equal to the unsupported drilling depth.

2 . The system of claim 1 , wherein the distal end includes a cutting portion configured to cut through the flooring substrate and the support substrate.

3 . The system of claim 2 , wherein the cutting portion includes a plurality of cutting flutes on opposing sides of the shank portion.

4 . The system of claim 1 , wherein the unthreaded section has a circumference that tapers from the threaded section to the distal end.

5 . The system of claim 1 , wherein the flooring substrate includes a floor surface and a lower flange defining the hollow core, the lower flange supported on an upper surface of the support substrate.

6 . The system of claim 5 , wherein the length of the unthreaded section is at least a depth of the flooring substrate between the floor surface and the upper surface of the support substrate.

7 . The system of claim 1 , wherein the flooring substrate is comprised of a first material and the support substrate is comprised of a second material.

8 . The system of claim 7 , wherein at least one of the first material or the second material are comprised of aluminum.

9 . The system of claim 1 , wherein the length of the threaded section along the shank portion from the head portion is greater than a depth of the flooring substrate.

Assignments (1)

Continuity (1)

References Cited (40)