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US 6,688,988 B2Granted
Looking thread cold forming tool
AssigneeBalax, Inc.
InventorThomas W. McClure
Life of this patent
Estimating the term…
Abstract
A thread forming tap comprising a shank section, a body section extending longitudinally from the shank section, a helical thread formed on the body section having radially converging flank portions and an undercut ramp formed in at least one of said flank portions at a predetermined angle.
Claims23
A thread forming tool comprising:
- a body section having a helical thread formed thereon;
- said thread having radially converging flank portions, an undercut ramp area formed at the end of one of said flank portions arranged at a preselected angle to the thread and adapted to form a modified cup on the crest portion of the thread to be formed by the tool.
A thread forming tap comprising:
- a shank section;
- a body section extending longitudinally from the shank section;
- a helical thread formed on the body section and having radially converging flank portions, an undercut ramp area formed at the end of one of said flank portions and arranged at a preselected angle to said flank portion;
- said undercut ramp adapted to form a modified cup at the crest of the thread to be formed by the tap.
1 more element
A thread forming tool comprising:
- a shank section;
- a body section extending longitudinally from the shank section;
- a helical thread formed on the body section and having radially converging flank portions, an undercut ramp area formed at a point less than the pitch diameter of the flank portion thread and extending toward the thread root diameter;
- said undercut ramp arranged at a preselected angle to said flank portion and adapted to form a modified cup at the crest of the thread to be formed by the tap.
1 more element
Dependencies are inferred from the claim text.