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US 7,682,118 B2Granted
Threaded screw fastener with multiple characteristic threads
AssigneeIllinois Tool Works Inc.
InventorsYongping Gong, Cheryl L. Panasik, Mark D. Latz
Life of this patent
Estimating the term…
Abstract
A fastener with multiple thread characteristics includes a shank and head. The shank has a penetrating tip distal most from the head. The shank includes a first, conventional thread formation formed therein adjacent the penetrating tip and a second, anti-back-out thread formation adjacent the conventional thread formation, between the conventional thread formation and the head.
Claims17
A fastener comprising:
- a shank;
- and
- a head,
- the shank having a penetrating tip distal most from the head, the shank including a conventional thread formation and an anti-back-out thread formation having an inclined front flank surface and an inclined rear flank surface, wherein the front flank surface is formed at an angle of about 30 degrees to about 60 degrees and wherein the rear flank surface is formed at an angle that is greater than zero and less than 30 degrees relative to a plane through and normal to the shank and passing through a top of the thread, wherein the conventional thread formation is adjacent the anti-back-out thread formation, between the anti-back-out thread formation and the penetrating tip, wherein the conventional thread formation defines an inclined front flank surface and an inclined rear flank surface, wherein each flank surface is formed at about an equal angle relative to a plane through and normal to the shank.
1 more element
A fastener with multiple thread characteristics comprising:
- a shank and head, the shank having a penetrating tip distal most from the head, the shank including
- a first, conventional thread formation formed therein adjacent the penetrating tip, wherein the first conventional thread formation defines an inclined front flank surface and an inclined rear flank surface, wherein each flank surface is formed at about an equal angle relative to a plane through and normal to the shank and passing through a top of the thread;
- and
- a second, anti-back-out thread formation adjacent the conventional thread formation, between the conventional thread formation and the head, the anti-back-out thread formation including an inclined front flank surface and an inclined rear flank surface, wherein the front flank surface is formed at an angle of about 30 degrees to about 60 degrees and wherein the rear flank surface is formed at an angle less than the angle of the front flank surface.
1 more element
A fastener with multiple thread characteristics comprising:
- a shank and head, the shank having a penetrating tip distal most from the head, the shank including
- a first, conventional thread formation formed therein adjacent the penetrating tip, the conventional thread formation defining an inclined front flank surface and an inclined rear flank surface, each formed at an angle relative to a plane passing through a top of the thread and through and normal to the shank, equal to about one another,
- the fastener including a second, anti-back-out thread formation adjacent the conventional thread formation, between the conventional thread formation and the head, the anti-back-out thread formation including an inclined front flank surface and an inclined rear flank surface, wherein the front flank surface is formed at an angle of about 60 degrees and wherein the rear flank surface is formed at an angle of about zero degrees to about 8 degrees relative to a plane passing through a top of the thread and through and normal to the shank, and wherein the conventional thread formation and the anti-back-out thread formation have about an equal thread spacing.
Dependencies are inferred from the claim text.