Cable Bolt
AssigneeJennmar Corporation
InventorsPeter Harold Craig, Timothy Joseph Gaudry, John Naylor
Life of this patent
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Abstract
A cable bolt (10, 60) comprising a flexible cable 11 formed from a plurality of wound strands, wherein at least one of the strands is a hollow strand 12b. In one form, at least one region 14 of the hollow strand is formed with a helical formation or is otherwise arranged to resist radial compression. A cable bolt 60 is also disclosed with a hollow strand 12b that has a coupling 65 fitted at one end 14 and a resin retainer 61 fitted on the other end of the hollow strand.
Claims39
1:
- A cable bolt extends along an axis between opposite ends, the cable bolt comprising:
- a flexible cable formed from a plurality of wound strands,
- wherein at least one of the strands is a hollow strand comprising at least one region for resisting radial compression.
2:
- The cable bolt of claim 1, wherein the at least one region includes reinforcing.
3-4. (canceled)
5:
- A cable bolt extends along an axis between opposite ends, the cable bolt comprising:
- a flexible cable formed from a plurality of wound strands,
- wherein at least one of the strands is a hollow strand including one or more helical formations extending along at least one region of the strand.
6-16. (canceled)
17:
- The cable bolt of claim 5, comprising a tensioning assembly comprising an end fitting mounted on the cable over a said region of the hollow strand, the end fitting being able to be repositioned along the cable and is arranged in use to clamp the cable so as induce radial compression on the cable.
18:
- The cable bolt according to claim 17, wherein the end fitting is mounted adjacent a proximal end of the cable.
19:
- The cable bolt of claim 17, wherein the end fitting comprises a barrel and wedge assembly having a plurality of wedges being directly mountable to the cable bolt and a barrel being mounted over and receiving the wedges therein.
20:
- The cable bolt of claim 17, wherein the end fitting comprises:
- a swage fitting mountable at or near the proximal end of the cable;
- and
- a nut threadingly mountable to the swage fitting.
21:
- The cable bolt according to claim 17, wherein the tensioning assembly further comprises a bearer plate which is mounted to the cable between the end fitting and the distal end of the cable, wherein the end fitting limits the axial movement of the bearer plate towards the proximal end of the cable bolt.
22:
- The cable bolt of claim 1, wherein a portion of the hollow strand protrudes from a proximal end of the cable, the protruding end having a coupling mounted thereon for receiving a lance to introduce fluid into the hollow strand.
23:
- A cable bolt extends along an axis between opposite ends, the cable bolt comprising:
- a flexible cable formed from a plurality of wound strands,
- wherein one of the strands is a hollow strand having a coupling mounted thereon for receiving a lance to introduce fluid into the hollow strand.
24:
- The cable bolt of claim 23, wherein a portion of the hollow strand protrudes from a proximal end of the cable, the protruding end having the coupling threadingly engaged with the protruding end, the protruding end comprising a threaded outer surface and the coupling has a complementary internal thread.
25:
- The cable bolt according to claim 23, wherein the coupling has a diameter that is less than the outer diameter of the proximal end of the cable bolt.
26:
- The cable bolt according to claim 23, wherein the coupling includes a plurality of bayonet fitting slots arranged to receive respective locking pins disposed on the lance, the slots having a return portion at an end thereof in which the locking pins locate, the returns being configured to prevent inadvertent release of the lance from the coupling when the fluid is introduced into the hollow strand from the lance under pressure.
27:
- The cable bolt according to claim 23, wherein the coupling also acts as a drive head for the cable bolt to allow rotation to be imparted to the cable bolt.
28-29. (canceled)
30:
- The cable bolt of claim 1, comprising one said hollow strand located axially within the cable.
31:
- The cable bolt of claim 30, comprising a plurality of non-hollow strands about the hollow strand.
32:
- The cable bolt of claim 5, wherein the cable bolt has a first distal portion adapted primarily for resin point anchoring, and a second proximal portion adapted predominantly for cement grouting.
33:
- The cable bolt according to claim 32, wherein the first portion includes one or more radially outwardly extending resin mixing protrusions.
34:
- The cable bolt of claim 32, comprising a resin retainer affixed to said cable between said first portion and said second portion and having a radially outwardly extending head arranged to substantially reduce the migration of resin from said first portion to said second portion within the bore.
35:
- The cable bolt according to claim 34, wherein the resin retainer head is arranged to maintain the cable strands in spaced relation from one another to form a bulb in the cable.
36:
- The cable bolt of claim 34, wherein the hollow strand extends within the proximal portion and has a distal end that is disposed proximally of the retainer.
37:
- The cable bolt according to claim 36, wherein the resin retainer includes a sleeve the extends from the head and being located over the distal end of the hollow strand, the sleeve including one or more lateral openings and being adapted to direct air or grout from the hollow strand distal end to flow in a radial direction.
38:
- A cable bolt extends along an axis between opposite ends, the cable bolt comprising:
- a flexible cable formed from a plurality of wound strands,
- wherein one of the strands is a hollow strand, a first distal portion of the cable being adapted primarily for resin point anchoring, and a second proximal portion adapted predominantly for cement grouting, a resin retainer affixed to said cable between said first portion and said second portion and having a radially outwardly extending head arranged to substantially reduce the migration of resin from said first portion to said second portion within the bore, the hollow strand extending within the proximal portion and has a distal end that is disposed proximally of the retainer, wherein the retainer further comprises a sleeve the extends from the head and is located over the distal end of the hollow strand, the sleeve including one or more lateral openings so that air or grout from the hollow strand distal end is directed to flow in a radial direction.
39:
- The cable bolt according to claim 38, wherein the resin retainer head is arranged to maintain the non-central strands in spaced relation from one another to form a bulb in the cable.
(canceled)
41:
- The cable bolt of claim 1, wherein the hollow strand is metal.
42-44. (canceled)
45:
- The cable bolt of claim 1, wherein the flexible cable is configured to be coiled without kinking the hollow strand wherein the cable coil has a minimum diameter in the range of 0.8 m to 2.5 m.
46-47. (canceled)
48:
- A method of forming a cable bolt comprising the steps of:
- co-forming a length of cable comprising a central hollow strand and a plurality of co-extending strands wound about the hollow strand;
- reeling the length of cable;
- and
- obtaining a predetermined sub-length of cable from the length of cable.
49:
- The method of claim 48, wherein the obtained sub-length of cable is cut from the length of cable.
50:
- The method of claim 48, comprising the step, after the obtaining step, of partially unwinding a portion of the co-extending strands and removing a portion of the central hollow strand from within the unwound co-extending strand portion.
51:
- The method of claim 50, comprising the step, after the unwinding step, of rewinding the co-extending strands portion.
52:
- The method of claim 50, comprising the step, after the unwinding step, of placing a device on a cut end of hollow strand remaining in the cable, the device spacing portions of the co-extending strands at the device from the hollow strand.
53:
- The cable bolt of claim 1, comprising a tensioning assembly comprising an end fitting mounted on the cable over a said region of the hollow strand, the end fitting being able to be repositioned along the cable and is arranged in use to clamp the cable so as induce radial compression on the cable.
54:
- The cable bolt of claim 5, wherein a portion of the hollow strand protrudes from a proximal end of the cable, the protruding end having a coupling mounted thereon for receiving a lance to introduce fluid into the hollow strand.
Dependencies are inferred from the claim text.