US4079592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for feeding and inserting bolts in a mine roof
Assignee: Long Airdox Co
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Filing: 1977-03-04
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Granted: 1978-03-21
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Expires: 1997-03-04
Abstract
Abstract In an apparatus for installing resin anchored roof bolts in a mine roof, continuous bolt material is stored on a spool rotatably mounted on a mobile roof bolter frame. As the apparatus advances along the mine passageway, the bolt material is uncoiled from the spool and guided upwardly into spaced apart, resin filled holes that are preformed in the mine roof. The bolt material is severed just beneath the roof at each hole to form a unitary roof bolt. A stop is formed in the unitary bolt with a hydraulically operated head and mandrel mechanism that makes a right angle bend in the bolt just beneath the mine roof.
Inventors
- 👤 Robert Nelson Eakin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:58
CPC Classifications
E; E21; E21D; E21D20/00; E21D20/003
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
An apparatus for feeding bolts into resin filled holes in a mine roof, comprising: a mobile frame; a spool rotatably mounted on said frame for storing continuous bolt material; means for uncoiling the bolt material from said spool and for guiding said material into a resin filled hole preformed in the mine roof; means for severing said bolt material adjacent said mine roof to form a unitary roof bolt; and means for forming a stop in said unitary bolt at an end thereof extending outwardly from said resin filled hole, said means including means for forming a right angle bend in an end of said roof bolt material extending outside said hole, said means including a mandrel for contacting a portion of said unitary roof bolt extending outside said hole, and a cooperating forming head below said mandrel for bending said roof bolt material around said mandrel.
Claim 2
Independent Claim
147 words
An apparatus for feeding bolts into resin filled holes in a mine roof, comprising: a mobile frame; a spool rotatably mounted on said frame for storing continuous bolt material; means for uncoiling the bolt material from said spool and for guiding said material into a resin filled hole preformed in the mine roof; means for severing said bolt material adjacent said mine roof to form a unitary roof bolt; and means for forming a stop in said unitary bolt at an end thereof extending outwardly from said resin filled hole, said means including means for forming a right angle bend in an end of said roof bolt material extending outside said hole, said means including a mandrel for contacting a portion of said unitary roof bolt extending outside said hole, and a cooperating forming head below said mandrel for bending said roof bolt material around said mandrel.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1, wherein said head is controlled by a hydraulic cylinder.
Claim 4
Independent Claim
118 words
A method of feeding roof bolts into preformed resin filled holes in a mine roof using continuous mine roof bolt material wound on a spool, comprising the steps of: (a) preforming a resin filled hole in a mine roof; (b) positioning a spool carrying roof bolt material in proximity to said preformed resin filled hole; (c) uncoiling a length of the bolt material from said spool; (d) guiding the free end of the uncoiled bolt material into said resin filled hole a sufficient distant to provide a resin anchored roof bolt along substantially the entire length of said bolt in the hole; and (e) thereafter severing the bolt material adjacent the roof to form a unitary roof bolt.
Claim 5
Independent Claim
118 words
A method of feeding roof bolts into preformed resin filled holes in a mine roof using continuous mine roof bolt material wound on a spool, comprising the steps of: (a) preforming a resin filled hole in a mine roof; (b) positioning a spool carrying roof bolt material in proximity to said preformed resin filled hole; (c) uncoiling a length of the bolt material from said spool; (d) guiding the free end of the uncoiled bolt material into said resin filled hole a sufficient distant to provide a resin anchored roof bolt along substantially the entire length of said bolt in the hole; and (e) thereafter severing the bolt material adjacent the roof to form a unitary roof bolt.
Claim 6
Dependent Claim
25 words
The method of claim 3, including the step of forming a stop on the unitary bolt at the severed end thereof extending outside said hole.
Claim 7
Dependent Claim
26 words
The method of claim 4, wherein said forming step includes the step of forming a right angle bend in said unitary bolt at said severed end.
References Cited (Backward Citations)
US3324663A
Cited
US3332244A
Cited
US3436923A
Cited
US3541797A
Cited
US3665717A
Cited
US3861155A
Cited
US3913338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |