US5163775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchor bolt repair coupling
Assignee: Individual
•
Filing: 1990-10-29
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Granted: 1992-11-17
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Expires: 2010-10-29
Abstract
Abstract An improved device for repairing failed anchor members that hold machinery to foundations. An anchor bolt repair coupling that engages a failed anchor member through the use of grips and facilitates the repair of the failed member.
Inventors
- 👤 Robert L. Rowan, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:33
CPC Classifications
F; F16; F16M; F16M7/00; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/5706; Y10T403/5793; Y10T403/70; Y10T403/7041; Y10T403/7047; Y10T403/7051; Y10T403/7052; Y10T403/7054
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
141 words
A repair coupling for repairing a broken anchor bolt, which comprises: a coupling base having a tapered internal wall defining a chamber open at one end, and having a threaded portion at the other end for receiving a threaded member; a plurality of grips each having a serrated face for gripping the broken anchor bolt and a substantially smooth face opposite the serrated face for contacting the tapered internal wall of the coupling base; said grips positioned in the chamber such that a passage is formed for receiving the broken anchor bolt, and; preloading means extending into said coupling base for forcibly engaging the grips against the broken anchor bolt such that said coupling and said anchor bolt are preloadable to a level greater than or equal to an anticipated maximum load level of the anchor bolt in a repaired condition.
Claim 2
Dependent Claim
141 words
A repair coupling for repairing a broken anchor bolt, which comprises: a coupling base having a tapered internal wall defining a chamber open at one end, and having a threaded portion at the other end for receiving a threaded member; a plurality of grips each having a serrated face for gripping the broken anchor bolt and a substantially smooth face opposite the serrated face for contacting the tapered internal wall of the coupling base; said grips positioned in the chamber such that a passage is formed for receiving the broken anchor bolt, and; preloading means extending into said coupling base for forcibly engaging the grips against the broken anchor bolt such that said coupling and said anchor bolt are preloadable to a level greater than or equal to an anticipated maximum load level of the anchor bolt in a repaired condition.
Claim 3
Dependent Claim
26 words
The apparatus of claim 1 wherein the preloading means are threaded fasteners which engage the grips substantially parallel to the longitudinal axis of the anchor bolt.
Claim 4
Dependent Claim
22 words
The apparatus of claim 1 wherein the grips are curved about an axis parallel to a longitudinal axis of the anchoring bolt.
Claim 5
Dependent Claim
18 words
The apparatus of claim 1 wherein the grips have a longitudinal notch for fracturing into several smaller grips.
Claim 6
Dependent Claim
27 words
The apparatus according to claim 1 wherein the preloading means are threaded fasteners which engage the grips substantially perpendicular to the longitudinal axis of the anchor bolt.
Claim 7
Dependent Claim
22 words
The apparatus of claim 5 further comprising a threaded cap for positioning the grips in the chamber and on the anchor bolt.
Claim 8
Dependent Claim
35 words
The apparatus of claim 1 further comprising a spacing means for positioning the grips within the chamber and against the wall such that the serrated face of the grips faces a centerline of the coupling.
Claim 9
Dependent Claim
170 words
A repair coupling for repairing broken anchor bolts, which comprises: a coupling base having a tapered internal wall defining a chamber open at one end, and having a threaded receptacle at the other end for receiving a threaded anchor member; a plurality of grips each having a serrate face for gripping the broken anchor bolt and a substantially smooth face opposite the serrated face for contacting the tapered internal wall of the coupling base; said grips positioned in the chamber such that a substantially cylindrical passage is formed for receiving the broken anchor bolt; spacing means for positioning the grips within the chamber and against the wall such that the serrated faces of the grips face a centerline of the coupling, and; preloading means extending into said coupling base for forcibly engaging the grips against the broken anchor bolt such that said coupling and said anchor bolt are preloadable to a level greater than or equal to an anticipated maximum load level of the anchor bolt in a repaired condition.
Claim 10
Dependent Claim
170 words
A repair coupling for repairing broken anchor bolts, which comprises: a coupling base having a tapered internal wall defining a chamber open at one end, and having a threaded receptacle at the other end for receiving a threaded anchor member; a plurality of grips each having a serrate face for gripping the broken anchor bolt and a substantially smooth face opposite the serrated face for contacting the tapered internal wall of the coupling base; said grips positioned in the chamber such that a substantially cylindrical passage is formed for receiving the broken anchor bolt; spacing means for positioning the grips within the chamber and against the wall such that the serrated faces of the grips face a centerline of the coupling, and; preloading means extending into said coupling base for forcibly engaging the grips against the broken anchor bolt such that said coupling and said anchor bolt are preloadable to a level greater than or equal to an anticipated maximum load level of the anchor bolt in a repaired condition.
Claim 11
Dependent Claim
26 words
The apparatus of claim 8 wherein the preloading means are threaded fasteners which engage the grips substantially parallel to the longitudinal axis of the anchor bolt.
Claim 12
Dependent Claim
12 words
The apparatus of claim 9 wherein the spacing means is a spring.
Claim 13
Independent Claim
237 words
A method for producing a repaired anchor bolt comprising the steps of: removing foundation surrounding a failed anchor bolt to produce a repair region of sufficient depth to expose the failed anchor bolt; removing all but a short stub of the failed anchor bolt; installing upon the failed anchor bolt a repair coupling assembly comprising a coupling base having a tapered internal wall defining a chamber open at one end and having a threaded portion at the other end for receiving a threaded replacement anchor member, a plurality of grips each having a serrated face for gripping the failed anchor bolt and a substantially smooth face opposite the serrated face for contacting the tapered internal wall of the coupling base, said grips positioned in the chamber such that a passage is formed for receiving the broken anchor bolt, and preloading means extending into said coupling base for forcibly engaging the grips against the broken anchor bolt; activating the preloading means to engage the grips against the failed anchor bolt and to preload said coupling assembly and said anchor bolt to a level greater than or equal to an anticipated maximum load level of the bolt in a repaired condition; attaching the threaded replacement anchor member to the threaded portion of the coupling base; and filling in the repair region with foundation repair material such that a portion of the replacement anchor member extends above the repaired foundation.
Claim 14
Independent Claim
237 words
A method for producing a repaired anchor bolt comprising the steps of: removing foundation surrounding a failed anchor bolt to produce a repair region of sufficient depth to expose the failed anchor bolt; removing all but a short stub of the failed anchor bolt; installing upon the failed anchor bolt a repair coupling assembly comprising a coupling base having a tapered internal wall defining a chamber open at one end and having a threaded portion at the other end for receiving a threaded replacement anchor member, a plurality of grips each having a serrated face for gripping the failed anchor bolt and a substantially smooth face opposite the serrated face for contacting the tapered internal wall of the coupling base, said grips positioned in the chamber such that a passage is formed for receiving the broken anchor bolt, and preloading means extending into said coupling base for forcibly engaging the grips against the broken anchor bolt; activating the preloading means to engage the grips against the failed anchor bolt and to preload said coupling assembly and said anchor bolt to a level greater than or equal to an anticipated maximum load level of the bolt in a repaired condition; attaching the threaded replacement anchor member to the threaded portion of the coupling base; and filling in the repair region with foundation repair material such that a portion of the replacement anchor member extends above the repaired foundation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-17 | 1996-05-18 | 1996-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-17 | 2000-05-18 | 2000-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-17 | 2004-05-18 | 2004-11-17 | $7700.00 | Window Closed / Lapsed |