Twisted helically shaped member
AssigneeProduct Licensing Company Ltd
InventorsRichard James Goodall, William Henry Ollis
Life of this patent
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Abstract
A twisted helically-shaped member (15) in the form of a twisted tie, twisted fastener, twisted wire or twisted rod; said twisted helically-shaped member (15) having an axial core (12) and a plurality of helical threads (13H) extending along the axial core (12); and wherein a variation in lead measurements along the length of at least one helical thread (13H), is less than a variation in pitch measurements along the lengths of the helical threads (13H); wherein the axial core (12) has a transverse cross-sectional area comprising two-fifths or less of the transverse circumscribed cross-sectional area of the helical threads (13H).
Claims18
A twisted helically-shaped member in the form of a twisted tie, twisted fastener, twisted wire or twisted rod;
- said twisted helically-shaped member having an axial core and a plurality of helical threads extending along the axial core;
- wherein a variation in lead measurements along the length of at least one helical thread, is less than a variation in pitch measurements along the lengths of the helical threads;
- the axial core has a transverse cross-sectional area comprising two-fifths or less of the transverse circumscribed cross-sectional area of the helical threads;
- and the twisted helically-shaped member has an ultimate tensile strength in the range 850 MPa to 1380 MPa.
A twisted helically-shaped member in the form of a twisted tie, twisted fastener, twisted wire or twisted rod;
- said twisted helically-shaped member having:
- an axial core;
- a plurality of helical threads extending along the axial core;
- and a shank portion at one end;
- wherein a variation in lead measurements along the length of at least one helical thread, is less than a variation in pitch measurements along the lengths of the helical threads;
- the axial core has a transverse cross-sectional area comprising two-fifths or less of the transverse circumscribed cross-sectional area of the helical threads;
- and the shank portion has a maximum diameter that is more than 50% of the maximum diameter of the helical member.
A twisted helically-shaped member in the form of a twisted tie, twisted fastener, twisted wire or twisted rod;
- said twisted helically-shaped member having:
- an axial core;
- a plurality of helical threads extending along the axial core;
- and a shank portion at one end;
- wherein a variation in lead measurements along the length of at least one helical thread, is less than a variation in pitch measurements along the lengths of the helical threads;
- the axial core has a transverse cross-sectional area comprising two-fifths or less of the transverse circumscribed cross-sectional area of the helical threads;
- and the shank portion has a maximum length that is equal to or less than the length of a pitch distance.
Dependencies are inferred from the claim text.