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US 9,803,679 B1Granted
Deformable fastening thread providing wedge-effect
OwnerMartin Eidingerinventor
Life of this patent
Estimating the term…
Abstract
Disclosed is a fastener that includes a thread having a groove formed therein to provide a loosening resistance due to a deformation of the thread, the deformation resulting from a threshold axial force applied to the thread by a receiving structure.
Claims20
A fastener comprising:
- a head end;
- and
- a helical thread having a crest, an insertion direction flank facing away from said head end and a removal direction flank facing towards said head end, said removal direction flank having a groove formed therein, said groove having a maximum depth being at least one half a thickness of said helical thread at a height position of said maximum depth of said groove on said helical thread, said removal direction flank extending from an edge of said groove towards said crest.
A fastener comprising:
- a head end;
- and
- a helical thread having an insertion direction flank facing away from said head end and a removal direction flank facing towards said head end, said removal direction flank having a groove formed therein, said groove having a maximum depth being at least one half a thickness of said helical thread at a height position of said maximum depth of said groove on said helical thread, said groove being disposed at a root of said thread.
A fastener comprising:
- a head end;
- and
- a helical thread having an insertion direction flank facing away from said head end and a removal direction flank facing towards said head end, said removal direction flank having a groove formed therein, said groove having a maximum depth being at least one half a thickness of said helical thread at a height position of said maximum depth of said groove on said helical thread, said groove is disposed substantially below a pitch diameter of said thread.
A fastener comprising:
- a head end;
- and
- a helical thread having an insertion direction flank facing away from said head end and a removal direction flank facing towards said head end, said removal direction flank having a groove formed therein, said groove having a maximum depth being at least one half a thickness of said helical thread at a height position of said maximum depth of said groove on said helical thread, said maximum depth of said groove having a height dimension that is at least half a distance between two roots of said thread.
A fastener comprising:
- a head end;
- a helical thread having an insertion direction flank facing away from said head end and a removal direction flank facing towards said head end, said removal direction flank having a groove formed therein, said groove having a maximum depth being at least one half a thickness of said helical thread at a height position of said maximum depth of said groove on said helical thread;
- wherein said groove is disposed at a root of said thread;
- wherein said groove is disposed substantially below a pitch diameter of said thread;
- and
- wherein said groove is configured to allow said thread to deform and increase a major diameter of said thread due to an axial force.
3 more elements
A fastener comprising:
- a head end;
- a helical thread having an insertion direction flank facing away from said head end and a removal direction flank facing towards said head end, said removal direction flank having a groove formed therein, said groove having a maximum depth being at least one half a thickness of said helical thread at a height position of said maximum depth of said groove on said helical thread;
- wherein said groove is disposed at a root of said thread;
- wherein said groove is disposed substantially below a pitch diameter of said thread;
- wherein said groove is configured to allow said thread to deform and increase a major diameter of said thread due to an axial force;
- wherein said groove allows said thread to plastically deform at a plastic hinge near said root of said thread;
- wherein said axial force is applied in response to a tightening torque applied to said fastener, said tightening torque causing said fastener and a receiving structure to tighten together due to said thread being helical;
- and
- wherein due to said groove, said tightening torque transfers to cause a deformation of said thread to increase said major diameter of said thread due to said deformation, said deformation being caused when a threshold axial force is applied to said removal direction flank.
6 more elements
Dependencies are inferred from the claim text.