# US 2018/0023391 A1 · Slotted Tubular Anchor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0023391 A1 - Document ID: US20180023391A1 - Status: Published application - Kind: A1 - Application number: 15/657,676 - Filed: 2017-07-24 - Published: 2018-01-25 - Earliest claimed: 2016-07-25 - Assignees: FCI Holdings Delaware, Inc. - Applicants: FCI Holdings Delaware, Inc. - Inventors: John C. Stankus; Dakota Faulkner; David Rager - Web page: https://patentgrep.com/patent/US20180023391A1 ## CPC - E21D 21/008: {Anchoring or tensioning means} - E21D 20/00: Setting anchoring-bolts (anchoring bolts for shafts, tunnels or galleries E21D21/00; means for anchoring structural elements or bulkheads specially adapted to foundation engineering E02D5/74; dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose F16B13/00) - E21D 21/0053: {Anchoring-bolts in the form of lost drilling rods} - E21D: SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil-conditioning or soil-stabilising materials C09K17/00; drilling or cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F) ## Abstract A mine bolt includes an elongated body having a first end and a second end positioned opposite the first end, and an anchor comprising a tube defining a central opening and a slot extending at least a portion of the length of the tube. The anchor is secured to the elongated body. The anchor is configured to compress upon installation of the mine bolt to anchor the elongated body within a bore hole. ## Claims ### Claim 1 A mine bolt comprising: an elongated body having a first end and a second end positioned opposite the first end; and an anchor comprising a tube defining a central opening and a slot extending at least a portion of the length of the tube, the anchor is secured to the elongated body, wherein the anchor is configured to compress upon installation of the mine bolt to anchor the elongated body within a bore hole. ### Claim 2 (depends on 1) The mine bolt of claim 1, wherein the anchor comprises a nut secured to the tube and positioned within the central opening, the elongated body having a threaded portion configured to be received by the nut. ### Claim 3 (depends on 2) The mine bolt of claim 2, wherein the nut is welded to the tube. ### Claim 4 (depends on 2) The mine bolt of claim 2, wherein the threaded portion is positioned at the first end of the elongated body. ### Claim 5 (depends on 1) The mine bolt of claim 1, wherein the anchor includes a tapered first end and a second end positioned opposite the tapered first end. ### Claim 6 (depends on 5) The mine bolt of claim 5, wherein the second end of the anchor defines a plurality of slits configured to engage a bore hole wall when the mine bolt is installed and placed under loading. ### Claim 7 (depends on 5) The mine bolt of claim 5, wherein the tapered first end defines a slit. ### Claim 8 (depends on 1) The mine bolt of claim 1, wherein the anchor extends from the first end of the elongated body to a position intermediate the first end and the second end of the elongated body. ### Claim 9 (depends on 1) The mine bolt of claim 1, wherein the anchor comprises a nut secured to the tube and positioned within the central opening, the elongated body having a threaded portion received by the nut, the elongated body axially and rotationally moveable relative to the anchor. ### Claim 10 (depends on 1) The mine bolt of claim 1, wherein the second end of the elongated body comprises a drive head. ### Claim 11 (depends on 1) The mine bolt of claim 1, further comprising a bearing plate configured to receive the elongated body. ### Claim 12 (depends on 1) The mine bolt of claim 1, wherein the anchor comprises an unthreaded nut secured to the tube and positioned within the central opening, the elongated body having first and second support nuts received by a threaded position of the elongated body, the first and second support nuts configured to restrict the axial movement of the elongated body relative to the unthreaded nut and the anchor. ### Claim 13 A method of installing a mine bolt comprising: providing a mine bolt comprising an elongated body having a first end and a second end positioned opposite the first end, and an anchor comprising a tube defining a central opening and a slot extending at least a portion of the length of the tube, the anchor is secured to the elongated body; and inserting the mine bolt into a bore hole with the anchor compressing as the anchor is inserted into the bore hole. ### Claim 14 (depends on 13) The method of claim 13, wherein the mine bolt is inserted into the bore hole until the second end of the elongated body is positioned at an opening of the bore hole. ### Claim 15 (depends on 13) The method of claim 13, wherein the method further comprises: providing a bearing plate that receives the elongated body; and tensioning the mine bolt by rotating the elongated body about a longitudinal axis to move the elongated body axially relative to the anchor. ### Claim 16 (depends on 15) The method of claim 15, wherein the anchor comprises a nut secured to the tube and positioned within the central opening, the elongated body having a threaded portion received by the nut. ### Claim 17 (depends on 16) The method of claim 16, wherein the second end of the elongated body comprises a drive head, and wherein the elongated body is rotated by engaging the drive head of the elongated body. ### Claim 18 (depends on 13) The method of claim 13, wherein the anchor includes a tapered first end and a second end positioned opposite the tapered first end, and wherein the tapered first end is the first portion of the mine bolt inserted into the bore hole. ### Claim 19 (depends on 13) The method of claim 13, wherein the elongated body comprises a drill bit. ### Claim 20 (depends on 19) The method of claim 19, wherein the anchor comprises an unthreaded nut secured to the tube and positioned within the central opening, the elongated body having first and second support nuts received by a threaded position of the elongated body, the first and second support nuts configured to restrict the axial movement of the elongated body relative to the unthreaded nut and the anchor.