Internally threaded fastener having a prevailing torque feature
AssigneeProduction Spring, LLC
InventorsLawrence Johnson, Arturo Spaccarotelli, Alfred Rosbury
Life of this patent
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Abstract
A threaded fastener having a prevailing torque feature and a method for forming same includes a barrel having a longitudinal axis. The barrel has a plurality of internal threads, each internal thread including a forward facing surface and a rearward facing surface. A first angle between the rearward facing surface and a first lateral axis perpendicular to the longitudinal axis ranges from 20° to 40°. A second angle between the forward facing surface and the rearward facing surface ranges from 80° to 100°.
Claims20
An internally threaded fastener having a prevailing torque feature, comprising:
- a barrel having a longitudinal axis, the barrel having a plurality of internal threads, each internal thread including a forward facing surface and a rearward facing surface,
- wherein a first angle between the rearward facing surface and a first lateral axis perpendicular to the longitudinal axis ranges from 20° to 40°,
- wherein a second angle between the forward facing surface and the rearward facing surface ranges from 80° to 100°.
A method for forming an internally threaded fastener having a prevailing torque feature, comprising:
- providing a piece of sheet material;
- extruding the piece of sheet material to form a barrel having a longitudinal axis;
- and
- deforming the barrel to form a plurality of internal threads within the barrel, each internal thread including a forward facing surface and a rearward facing surface,
- wherein a first angle between the rearward facing surface and a first lateral axis perpendicular to the longitudinal axis ranges from 20° to 40°,
- wherein a second angle between the forward facing surface and the rearward facing surface ranges from 80° to 100°.
Dependencies are inferred from the claim text.