US2007197303A1PendingUtilityA1

Method for manufacturing connecting devices

48
Individually held — no corporate assignee on recordPriority: Aug 12, 2000Filed: Apr 11, 2007Published: Aug 23, 2007
Est. expiryAug 12, 2020(expired)· nominal 20-yr term from priority
Inventors:William Henry Ollis
B21F 7/00Y10T403/75E04G 23/0218B21F 45/16E04C 5/163E04B 1/4178B21G 3/20E04F 13/04E04B 1/7629E04C 5/03
48
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Claims

Abstract

A connecting device includes an axial core and a plurality of helical projections that extend radially from the core. The core has a cross section comprising two-fifths or less of the circumscribed cross sectional area of the device and the accuracy of the pitch of the helical projections varies by no more than 0.5% from any given probate pitch along the axis of the device. Another connecting device includes an axial core and two or three helical fins projecting radially from the core, wherein the core has a cross section comprising two-fifths or less of the circumscribed cross sectional area of the device, the accuracy of the pitch of the helical fins varies by no more than 0.5% from any given probate pitch along the axis of the device and wherein the root of the fin material includes a radiused surface. A further connecting device includes a twisted wire portion having an axial core and a plurality of projecting fins that extend radially from the core in a constant helical configuration, wherein the core has a cross section comprising two-fifths or less of the circumscribed cross sectional area of the wire, wherein the device has a pointed leading end and a rear end having a retaining head or clip.

Claims

exact text as granted — not AI-modified
1 . A connecting device including an axial core and a plurality of helical projections that extend radially from the core, wherein the core has a cross section comprising two-fifths or less of the circumscribed cross sectional area of the device and the accuracy of the pitch of the helical projections varies by no more than 0.5% from any given probate pitch along the axis of the device.  
     
     
         2 . A connecting device according to  claim 1 , wherein the at least some of the plurality of helical projections are tapered in cross section.  
     
     
         3 . A connecting device according to  claim 1 , wherein the plurality of helical projections are in the form of two or three fins that are tapered in cross section.  
     
     
         4 . A connecting device according to  claim 1 , wherein the plurality of helical projections include first and second fins that are tapered in cross section and first and second stubby ribs located between the first and second tapered fins.  
     
     
         5 . A connecting device according to  claim 1 , including an open helix.  
     
     
         6 . A connecting device according to  claim 1 , wherein the connecting device includes a wavy helical form.  
     
     
         7 . A connecting device according to  claim 1 , wherein the connecting device is substantially coiled.  
     
     
         8 . A connecting device according to  claim 1 , in which the plurality of helical projections extend substantially along the whole of the length of the device and includes at least one full 360° rotation within an axial distance of five and a half circumscribed profile diameters.  
     
     
         9 . A connecting device according to  claim 1 , in the form of twisted fasteners, ties or reinforcements.  
     
     
         10 . A connecting device according to  claim 1 , in which the device comprises a twisted wire, rod or hollow extrusion.  
     
     
         11 . A connecting device including an axial core and two or three helical fins projecting radially from the core, wherein the core has a cross section comprising two-fifths or less of the circumscribed cross sectional area of the device, the accuracy of the pitch of the helical fins varies by no more than 0.5% from any given probate pitch along the axis of the device and wherein the root of the fin material includes a radiused surface.  
     
     
         12 . A connecting device according to  claim 11 , in which the device includes at least one pointed end.  
     
     
         13 . A connecting device according to  claim 11 , in which the device includes a rear end portion having projecting tabs of material upon the fin material ends.  
     
     
         14 . A connecting device according to  claim 11 , including first and second fins and first and second stubby ribs located between the first and second fins.  
     
     
         15 . A connecting device according to  claim 11 , wherein at least some of the plurality of helical fins radially taper in cross section from a root portion at the axial core towards an outer tip portion.  
     
     
         16 . A connecting device according to  claim 11 , in which the plurality of helical fins extend substantially along the whole of the length of the device and includes at least one full 360° rotation within an axial distance of five and a half circumscribed profile diameters.  
     
     
         17 . A connecting device according to  claim 11 , in the form of fasteners, ties or reinforcements.  
     
     
         18 . A connecting device including a twisted wire portion having an axial core and a plurality of projecting fins that extend radially from the core in a constant helical configuration, wherein the core has a cross section comprising two-fifths or less of the circumscribed cross sectional area of the wire, wherein the device has a pointed leading end and a rear end having a retaining head or clip.  
     
     
         19 . A connecting device according to  claim 18 , in which the device includes a rear end portion having end tabs.  
     
     
         20 . A connecting device according to  claim 18 , including two or three major fins extending from the axial core.  
     
     
         21 . A connecting device according to  claim 18 , including first and second major fins and first and second stubby ribs located between the first and second major fins.  
     
     
         22 . A connecting device according to  claim 18 , wherein at least some of the plurality of helical fins radially taper from a root portion at the axial core towards an outer tip portion.  
     
     
         23 . A connecting device according to  claim 18 , in which the plurality of helical fins extend substantially along the whole of the length of the device and includes at least one full 360° rotation within an axial distance of five and a half circumscribed wire profile diameters.  
     
     
         24 . A connecting device according to  claim 18 , in which the twisted wire portion includes a rear end having projecting tabs of material upon the fin material ends.  
     
     
         25 . A connecting device according to  claim 18 , in which the retaining head or clip includes end tabs.  
     
     
         26 . A connecting device according to  claim 18 , in which the retaining head or clip is formed with a hole or a slot.  
     
     
         27 . A connecting device according to  claim 18 , in which the hole or slot corresponds with the sectional shape of the wire profile.  
     
     
         28 . A connecting device according to  claim 18 , in which the wire profile substantially fills an opening that has been formed in the retaining head or clip  
     
     
         29 . A connecting device according to  claim 18 , in which the retaining head or clip is metallic.  
     
     
         30 . A connecting device according to  claim 18 , in which the retaining head or clip is plastic.  
     
     
         31 . A connecting device according to  claim 18 , in which connector has means to radially engage an add-on member or retaining layer.

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