Patent US4140428A successfully refreshed from Google Patents.
US4140428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tie rod support for mine
Assignee: Shakespeare and Company
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Filing: 1978-03-06
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Granted: 1979-02-20
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Expires: 1998-03-06
Abstract
Abstract A tie rod support having a lightweight rod of fiber reinforced plastic (FRP) material with a tapered sleeve of non-ferrous material mounted on one end. The other end of the rod is adapted to be inserted axially into a hole in a wall or roof of a mine with the sleeve supporting a pressure plate abutting the inner surface of the wall or roof. Frangible cartridges of polyester resin and a catalyst are first inserted in the hole and axial rotation of the rod as it is inserted into the hole ruptures the cartridges and mixes their contents, causing rapid curing of the resin and a bond between the FRP rod and the inner surface of the hole.
Inventors
- 👤 Philippe H. McLain
- 👤 Ross J. Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:14
CPC Classifications
E; E21; E21D; E21D21/00; E21D21/0006; E21D20/00; E21D20/02; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/93
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
84 words
A tie rod support for a wall in a mine, comprising an elongated rod of fiber reinforced plastic material adapted for axial insertion in an elongated hole in said mine wall, means on one end of said rod for rupturing plastic cartridges in said hole, and a tapered anchor sleeve non-rotatively mounted on the other end of said rod by an epoxy resin bonded to said rod and non-rotatively engaging said sleeve, for supporting a pressure plate against the surface of said mine wall.
Claim 2
Dependent Claim
84 words
A tie rod support for a wall in a mine, comprising an elongated rod of fiber reinforced plastic material adapted for axial insertion in an elongated hole in said mine wall, means on one end of said rod for rupturing plastic cartridges in said hole, and a tapered anchor sleeve non-rotatively mounted on the other end of said rod by an epoxy resin bonded to said rod and non-rotatively engaging said sleeve, for supporting a pressure plate against the surface of said mine wall.
Claim 3
Dependent Claim
26 words
A tie rod support as described in claim 1, wherein the means on one end of the rod for rupturing plastic cartridges is a transverse projection.
Claim 4
Dependent Claim
17 words
A tie rod support as described in claim 1, wherein the tapered anchor sleeve is non-ferrous material.
Claim 5
Dependent Claim
44 words
A tie rod support as described in claim 3, wherein the inner surface of the anchor sleeve is inclined to its axis at an angle of about 8° and the larger end of the sleeve is substantially flush with the end of said rod.
Claim 6
Dependent Claim
28 words
A tie rod support as described in claim 1, wherein the fiber reinforced plastic material of the rod is a polyester resin, and the anchor sleeve is aluminum.
Claim 7
Dependent Claim
32 words
A tie rod support as described in claim 5, wherein the anchor sleeve is mounted on said rod by an epoxy resin mass bonded to said rod and non-rotatively engaging said sleeve.
Claim 8
Dependent Claim
44 words
A tie rod support as described in claim 6, wherein the inner surface of the anchor sleeve is inclined to its axis at an angle of about 8° and the larger end of the sleeve is substantially flush with the end of said rod.
Claim 9
Dependent Claim
25 words
A tie rod support as described in claim 1, wherein said anchor sleeve has exterior flat surfaces for engaging the socket of a rotary tool.
Claim 10
Dependent Claim
32 words
A tie rod support as described in claim 8, wherein said anchor sleeve is mounted on said rod by an epoxy resin mass bonded to said rod and non-rotatively engaging said sleeve.
Claim 11
Dependent Claim
44 words
A tie rod support as described in claim 9, wherein the inner surface of the anchor sleeve is inclined to its axis at an angle of about 8° and the larger end of the sleeve is substantially flush with the end of the rod.
Claim 12
Dependent Claim
28 words
A tie rod support as described in claim 10, wherein the fiber reinforced plastic material of the rod is a polyester resin, and the anchor sleeve is aluminum.
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) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |