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US 8,348,576 B1Granted
Fastener and fastener assembly with discontinuous threadform
AssigneeThe Boeing Company
InventorKevin O. Gaw
Life of this patent
Estimating the term…
Abstract
The disclosure provides in one embodiment for a fastener comprising a cylindrical shaft, a head attached to the shaft, and two or more external longitudinal threadforms, where each threadform comprises a plurality of spaced protrusions forming a separate helical path around the shaft. When the shaft is inserted into a corresponding mating receptacle, a combination of the shaft and the mating receptacle provides two or more pitches. The disclosure further provides for a fastener assembly.
Claims15
A fastener comprising:
- a cylindrical shaft;
- a head attached to the shaft;
- and,
- two or more external, longitudinal threadforms, each threadform comprising a plurality of spaced protrusions forming a separate helical path around the shaft, wherein the spaced protrusions are comprised of a first material comprising a notch sensitive material, and the shaft and the head are comprised of a second material different from the first material;
- wherein when the shaft is inserted into a corresponding mating receptacle, a combination of the shaft and the mating receptacle provides two or more pitches.
2 more elements
A fastener comprising:
- a cylindrical shaft;
- a head attached to the shaft;
- a first discontinuous longitudinal threadform comprising a plurality of first spaced protrusions forming a first helical path around the shaft, the first helical path having a first pitch;
- and,
- a second discontinuous longitudinal threadform comprising a plurality of second spaced protrusions forming a second helical path around the shaft, the second helical path having a second pitch;
- wherein the first spaced protrusions and the second spaced protrusions comprise a first material comprising a notch sensitive material, and the shaft and the head comprise a second material different from the first material;
- and,
- further wherein when the shaft is inserted into a corresponding mating receptacle, a combination of the shaft and the mating receptacle provides a first pitch and a second pitch different from the first pitch.
5 more elements
A fastener assembly comprising:
- a cylindrical shaft;
- a head attached to the shaft;
- two or more longitudinal threadforms, each threadform comprising a plurality of spaced protrusions forming a separate helical path around the shaft, wherein the spaced protrusions are comprised of a first material comprising a notch sensitive material, and the shaft and the head are comprised of a second material different from the first material;
- and,
- a corresponding mating receptacle designed to compatibly mate with the shaft;
- wherein when the shaft is inserted into the mating receptacle, a combination of the shaft and the mating receptacle provides two or more pitches.
3 more elements
A fastener assembly comprising:
- a cylindrical shaft;
- a head attached to the shaft;
- two or more external longitudinal threadforms on the shaft, each threadform forming a separate helical path around the shaft;
- and,
- a corresponding mating receptacle that is designed to compatibly mate with the shaft, the mating receptacle having two or more internal threadforms, each threadform comprising a plurality of spaced protrusions forming a separate helical path, wherein the spaced protrusions are comprised of a first material comprising a notch sensitive material, and the shaft and the head are comprised of a second material different from the first material;
- wherein when the shaft is inserted into the mating receptacle, a combination of the shaft and the mating receptacle provides two or more pitches.
3 more elements
Dependencies are inferred from the claim text.