US3877235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchor bolt assembly and utilization
Assignee: BLAIR MINE SUPPLY Inc
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Filing: 1973-11-28
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Granted: 1975-04-15
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Expires: 1993-11-28
Abstract
Abstract A pull-up bolting assembly is constructed to be inserted endwise and rotatably advanced as a unit within a bore hole of a rocklike roof or other structure, with the forward end of the assembly being employed to fracture an in-placed, adhesive resin material containing capsule, and to mix the adhesive material and force it about a hollow pipelike anchor member of the assembly and along the spacing between it and the bore hole. After the adhesive material has set or hardened about the hollow anchor member to non-rotatably fix it in position within a back end portion of the bore hole, a stop means is sheared by a bolt member of the assembly which is then relatively rotatably advanced within a resin-clear, front portion of the bore hole into and along the hollow anchor member until a bearing plate of the assembly is tension-held by the bolt against an outer face of the rock-like structure.
Inventors
- 👤 David H Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:08
CPC Classifications
F; F16; F16B; F16B13/00; F16B13/14; F16B13/141; F16B13/146; E; E21; E21D; E21D20/00; E21D20/02; E21D20/025; F16B13/143; F16B13/144
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
295 words
A roof bolting assembly for mounting in position within a bore hole of a mine roof that is to be strengthened which comprises, a hollow pipe anchor member of a shorter length than the depth of the bore hole, a destructible capsule that contains quick-setting adhesive resin and catalyst-hardener resin materials for insertion into a back end of the bore hole, a headed bolt having a threaded stem and an associated wide-face bearing plate, front and back closure walls at opposite ends of said anchor member, a threaded nut secured to a front end of said anchor member to rotatably receive a back end of said threaded stem therein, said bolt being initially limited in its positioning within said nut by endwise-abutment of the back end of said stem against said front closure wall, said anchor member and said bolt as assembled in the defined manner being adapted to be endwise-inserted and rotatably advanced within the hole until said back closure wall engages and fractures said capsule and mixes and distributes the resin material content thereof within the bore hole from its back end and forwardly along said anchor member, sealing means carriEd by said anchor member for preventing the mixed resin material from advancing along the bore hole beyond said front closure wall, said mixed resin material being adapted to quickly set within the bore hole and to thereby non-rotatably secure said anchor member therein, and said stem of said bolt being thereafter adapted to be turned within said nut to fracture and penetrate said front closure wall and advance relative to and within said anchor member until said bolt is drawn-up and tensioned to hold said bearing plate in tight engagement with the front face of the roof about the bore hole therein.
Claim 2
Dependent Claim
295 words
A roof bolting assembly for mounting in position within a bore hole of a mine roof that is to be strengthened which comprises, a hollow pipe anchor member of a shorter length than the depth of the bore hole, a destructible capsule that contains quick-setting adhesive resin and catalyst-hardener resin materials for insertion into a back end of the bore hole, a headed bolt having a threaded stem and an associated wide-face bearing plate, front and back closure walls at opposite ends of said anchor member, a threaded nut secured to a front end of said anchor member to rotatably receive a back end of said threaded stem therein, said bolt being initially limited in its positioning within said nut by endwise-abutment of the back end of said stem against said front closure wall, said anchor member and said bolt as assembled in the defined manner being adapted to be endwise-inserted and rotatably advanced within the hole until said back closure wall engages and fractures said capsule and mixes and distributes the resin material content thereof within the bore hole from its back end and forwardly along said anchor member, sealing means carriEd by said anchor member for preventing the mixed resin material from advancing along the bore hole beyond said front closure wall, said mixed resin material being adapted to quickly set within the bore hole and to thereby non-rotatably secure said anchor member therein, and said stem of said bolt being thereafter adapted to be turned within said nut to fracture and penetrate said front closure wall and advance relative to and within said anchor member until said bolt is drawn-up and tensioned to hold said bearing plate in tight engagement with the front face of the roof about the bore hole therein.
Claim 3
Dependent Claim
51 words
A roof bolting assembly as defined in claim 1 wherein said back and front closure wall are separate pieces that are welded to the front and back ends of said anchor member, and said sealing means is a ring-like gasket positioned about said anchor member adjacent to said front closure wall.
Claim 4
Dependent Claim
67 words
A roof bolting assembly as defined in claim 1 wherein, said front closure wall is a relatively thin piece of metal that is secured within the front end of said anchor pipe member and that is easily fractured by a backward advance of said bolt within said nut when said anchor member has been secured by the setting of the resin material thereabout within the bore hole.
Claim 5
Dependent Claim
35 words
A mine roof bolting assembly as defined in claim 1 wherein said back closure wall has at least one backwardly projecting portion for facilitating fracturing said capsule and the mixing of its resin material content.
Claim 6
Dependent Claim
19 words
A mine roof bolting assembly as defined in claim 4 wherein said backwardly projecting portion is a chisel-like edge.
Claim 7
Dependent Claim
39 words
A mine roof bolting assembly as defined in claim 1 wherein said back closure wall has a spaced-apart pair of upset projections adjacent its outer periphery that substantially correspond in width to the wall thickness of said anchor member.
Claim 8
Dependent Claim
66 words
A roof bolting assembly as defined in claim 1 wherein, said front closure wall is a thin metal disc having a peripheral flange portion projecting beyond the outer periphery of said anchor member to provide a seating shoulder for said sealing means, and said sealing means is a ring-like gasket encircling the outer wall of said anchor member and resting in abutment with said flange portion.
Claim 9
Dependent Claim
246 words
A bolting assembly for mounting in position within a bore hole extending inwardly from the face of a rock-like structure such as a mine roof and that is adapted to be secured in position within the bore hole by an adhesive material that has been placed within the bore hole which comprises, a cavity defining longitudinal extending metal anchor member of shorter length than the depth of the bore hole and adapted to be introduced into the bore hole and pressed into the adhesive material and to be thereafter non-rotatably secured in position therein by a hardening of the adhesive material thereabout, a bolt having a threaded stem and an associated washerlike bearing plate that is adapted to rest against the face of front part of the structure to close-off the bore hole therein, a threaded nut centrally secured over the cavity to the front end of said anchor member and adapted to rotatably receive a back end of the threaded stem of said bolt therein, stop means cooperating with said nut for limiting the amount of insertion of the threaded stem therewithin until said anchor member has been secured in position within the bore hole by the adhesive material, said stop means being adapted to be thereafter sheared by a rotational advance of said bolt within said nut into the cavity, so that said bolt can be fully advanced into tension-holding engagement with the face of the structure through the agency of said bearing plate.
Claim 10
Dependent Claim
246 words
A bolting assembly for mounting in position within a bore hole extending inwardly from the face of a rock-like structure such as a mine roof and that is adapted to be secured in position within the bore hole by an adhesive material that has been placed within the bore hole which comprises, a cavity defining longitudinal extending metal anchor member of shorter length than the depth of the bore hole and adapted to be introduced into the bore hole and pressed into the adhesive material and to be thereafter non-rotatably secured in position therein by a hardening of the adhesive material thereabout, a bolt having a threaded stem and an associated washerlike bearing plate that is adapted to rest against the face of front part of the structure to close-off the bore hole therein, a threaded nut centrally secured over the cavity to the front end of said anchor member and adapted to rotatably receive a back end of the threaded stem of said bolt therein, stop means cooperating with said nut for limiting the amount of insertion of the threaded stem therewithin until said anchor member has been secured in position within the bore hole by the adhesive material, said stop means being adapted to be thereafter sheared by a rotational advance of said bolt within said nut into the cavity, so that said bolt can be fully advanced into tension-holding engagement with the face of the structure through the agency of said bearing plate.
Claim 11
Dependent Claim
35 words
A bolting assembly as defined in claim 8 wherein said stop means is an end closure disc secured in position between a front end of said anchor member and a back end of said nut.
Claim 12
Dependent Claim
71 words
A bolting assembly as defined in claim 9 wherein, said closure disc is a metal member of relatively thin wall construction, said closure disc has a flange portion extending radially outwardly beyond the diameter of said anchor member, and a gasket is positioned on said pipe member against said flange portion for engaging the bore hole and restricting outward flow of the adhesive material to the length of said anchor member.
Claim 13
Dependent Claim
92 words
A roof bolting assembly as defined in claim 8 wherein, a ring-like gasket is carried by a front end portion of said anchor member for sealing-off the joint between the bore hole and said member during setting of the adhesive material within the bore hole, the outer surface of said anchor member is roughened to facilitate adherence of the adhesive material thereto, and said anchor member has a usual length from end to end of about 6 to 8 inches and has an outer diameter of about 1 to 1 3/8 inches.
Claim 14
Dependent Claim
82 words
A roof bolting assembly as defined in claim 8 wherein, said nut is directly secured on a front end portion of said anchor member, said stop means is a closure wall secured over a back end of said nut, said nut has an outer periphery that extends radially beyond the outer periphery of said anchor member, and a ring-like gasket is carried on a front end portion of said anchor member in forwardly limited abutment with the outer periphery of said nut.
Claim 15
Independent Claim
284 words
A method of reinforcing a mine roof having a rock-like construction which comprises, boring an elongated hole into the roof from an outer face thereof; providing a bolting assembly of a pipe-like hollow anchor member having a cross-extending back end wall and a fracturable closed-off front end wall portion, having a nut secured to the front end wall portion and projecting forwardly therefrom and having a headed bolt carrying a bearing plate and with its threaded end mounted within the nut for endwise abutment with the front end wall; first inserting a quick-setting resin adhesive material contained within a thin skin resin capsule into the inner end of the bore hole, inserting the bolting assembly endwise as non-rotatably unit into the bore hole with the back end wall of the pipe member in engagement with the capsule, rotating the bolting assembly and employing the back end of the anchor member to rupture the skin of the capsule and mix its resin material content, flowing the mixed resin material about and between the outer periphery of the anchor member and the inner periphery of the bore hole and restricting its forward flow to substantially the length of the anchor member during the rotative advance of the bolting assembly, hardening the mixed resin material about the anchor member to nonrotatably secure it within the bore hole, rotatably advancing the bolt by turning it with respect to the anchor member within the nut and fracturing the front end wall portion, and then advancing the bolt within the anchor member and drawing the bearing plate into tight abutment against the outer face of the roof over the bore hole by tightening the bolt under tension within the nut.
Claim 16
Independent Claim
284 words
A method of reinforcing a mine roof having a rock-like construction which comprises, boring an elongated hole into the roof from an outer face thereof; providing a bolting assembly of a pipe-like hollow anchor member having a cross-extending back end wall and a fracturable closed-off front end wall portion, having a nut secured to the front end wall portion and projecting forwardly therefrom and having a headed bolt carrying a bearing plate and with its threaded end mounted within the nut for endwise abutment with the front end wall; first inserting a quick-setting resin adhesive material contained within a thin skin resin capsule into the inner end of the bore hole, inserting the bolting assembly endwise as non-rotatably unit into the bore hole with the back end wall of the pipe member in engagement with the capsule, rotating the bolting assembly and employing the back end of the anchor member to rupture the skin of the capsule and mix its resin material content, flowing the mixed resin material about and between the outer periphery of the anchor member and the inner periphery of the bore hole and restricting its forward flow to substantially the length of the anchor member during the rotative advance of the bolting assembly, hardening the mixed resin material about the anchor member to nonrotatably secure it within the bore hole, rotatably advancing the bolt by turning it with respect to the anchor member within the nut and fracturing the front end wall portion, and then advancing the bolt within the anchor member and drawing the bearing plate into tight abutment against the outer face of the roof over the bore hole by tightening the bolt under tension within the nut.
Claim 17
Dependent Claim
49 words
A method as defined in claim 13 wherein an annular width of spacing within a range of about one-sixteenth to one/eighth of an inch is maintained between the inner diameter of the bore hole and the outer diameter of the anchor member within which the resin material is hardened.
Claim 18
Dependent Claim
240 words
Am improved anchor bolting assembly for mounting in position within a hole extending from a face of and into a support structure and that is adapted to be secured in position within the hole by an adhesive material placed therein which comprises, a longitudinally extending anchor member adapted to be introduced into the hole and having a back end portion for movement into the adhesive material therein, said anchor member being adapted to be thereafter secured in position by hardening of the adhesive material thereabout, a headed bolt having a threaded stem and carrying a bearing plate member thereon that is adapted to rest against a face of the front part of the structure to close-off the hole therein, threaded nut-like means secured on a front end of said anchor member and adapted to receive a back end of said stem therein, means carried by the front end of said anchor member to initially limit the advance of said stem within said nut-like means when said anchor member is being inserted into the hole and to thereafter fracture under rotational advance of an end portion of said stem within said nut-like means and with respect to said anchor member when said anchor member has been secured in position within the hole by the adhesive material, so that said bolt can be advanced into holding engagement with the face of the support structure through the agency of said bearing plate member.
Claim 19
Dependent Claim
240 words
Am improved anchor bolting assembly for mounting in position within a hole extending from a face of and into a support structure and that is adapted to be secured in position within the hole by an adhesive material placed therein which comprises, a longitudinally extending anchor member adapted to be introduced into the hole and having a back end portion for movement into the adhesive material therein, said anchor member being adapted to be thereafter secured in position by hardening of the adhesive material thereabout, a headed bolt having a threaded stem and carrying a bearing plate member thereon that is adapted to rest against a face of the front part of the structure to close-off the hole therein, threaded nut-like means secured on a front end of said anchor member and adapted to receive a back end of said stem therein, means carried by the front end of said anchor member to initially limit the advance of said stem within said nut-like means when said anchor member is being inserted into the hole and to thereafter fracture under rotational advance of an end portion of said stem within said nut-like means and with respect to said anchor member when said anchor member has been secured in position within the hole by the adhesive material, so that said bolt can be advanced into holding engagement with the face of the support structure through the agency of said bearing plate member.
Claim 20
Dependent Claim
36 words
An improved anchor bolting assembly as defined in claim 15 wherein flange means is positioned about a forward end portion of said anchor member and extends radially outwardly beyond the outer periphery of said anchor member.
Claim 21
Dependent Claim
32 words
An improved anchor bolting assembly as defined in claim 16 wherein a ring-like gasket is carried on the front end portion of said anchor member in forwardly limited abutment with said flange.
Claim 22
Dependent Claim
242 words
An improved anchor bolting assembly for mounting in position within a hole extending from a front face of and into a support structure and that is adapted to be secured within the hole by an adhesive material carried within a destructible capsule that has been placed therein which comprises, a longitudinally extending pipe-like anchor member having means closing-off its back end, a headed bolt having a threaded stem and carrying a bearing plate thereon, threaded nut-like means carried on a front end portion of said anchor member and adapted to rotatably receive a forward end of said stem therein, stop means carried by the front end portion of said anchor member to initially limit turning advance of said stem within said nut-like means and with respect to said anchor member when said anchor member is being inserted within the hole, said closing-off means being adapted to move into pressure engagement with the capsule to fracture it and force the adhesive material along the outer side of the length of said anchor member when said anchor member is introduced into the hole by said threaded stem, said anchor member being adapted to be secured in position within the hole by the adhesive material, and said stop means being adapted to thereafter be displaced under relative rotational backward advancement of said stem within said nut-like means whereby said bearing plate may be moved into holding engagement with the front face of the support structure.
Claim 23
Dependent Claim
242 words
An improved anchor bolting assembly for mounting in position within a hole extending from a front face of and into a support structure and that is adapted to be secured within the hole by an adhesive material carried within a destructible capsule that has been placed therein which comprises, a longitudinally extending pipe-like anchor member having means closing-off its back end, a headed bolt having a threaded stem and carrying a bearing plate thereon, threaded nut-like means carried on a front end portion of said anchor member and adapted to rotatably receive a forward end of said stem therein, stop means carried by the front end portion of said anchor member to initially limit turning advance of said stem within said nut-like means and with respect to said anchor member when said anchor member is being inserted within the hole, said closing-off means being adapted to move into pressure engagement with the capsule to fracture it and force the adhesive material along the outer side of the length of said anchor member when said anchor member is introduced into the hole by said threaded stem, said anchor member being adapted to be secured in position within the hole by the adhesive material, and said stop means being adapted to thereafter be displaced under relative rotational backward advancement of said stem within said nut-like means whereby said bearing plate may be moved into holding engagement with the front face of the support structure.
Claim 24
Dependent Claim
38 words
An improved anchor bolting assembly as defined in claim 18 wherein means is carried by the front end portion of said anchor member for confining flow of the adhesive material to substantially the length of said anchor member.
Claim 25
Dependent Claim
22 words
An improved anchor bolting assembly as defined in claim 19 wherein said closing-off means has means for facilitating penetration of the capsule.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |