US3729218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butt joining of steel bars and connection assembly therefor
Assignee: Individual
•
Filing: 1970-08-20
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Granted: 1973-04-24
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Expires: 1990-08-20
Abstract
Abstract To butt join steel bars and maintain any tightly abutting, or accurately spaced position of the bars to be joined, wires of high tensile strength (such as piano-type wires and the like) are located right next to the rod to be joined, the entire assembly then being surrounded by a tubular sleeve which is compressed and cold flowed over the wires and the rods to be joined together; compressive force can be reduced by forming spaced upstanding ridges on the sleeve, the compressive force being applied only against the ridges. The space bridging the ends of the rods to be joined is left free of compression ridges.
Inventors
- 👤 S Gutmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:12
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/16; E04C5/162; E04C5/163; E04C5/165; Y; Y10; Y10T; Y10T403/00; Y10T403/49; Y10T403/57
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
102 words
Butt joint to splice rods located in end alignment with the ends being spaced by a gap (26) comprising a plurality of wires (4, 14, 24) of high tensile strength material placed adjacent said rods (1, 2, 21, 22) to be spliced and bridging the gap (26) between the ends of said rods, said wires extending beyond the gap and substantially parallel to said rods; and a tubular sleeve (3, 13, 23) of deformable material extending over said wires and being compressed and cold flowed over said wires and said rods to be spliced and tightly gripping said rods and said wires.
Claim 2
Dependent Claim
102 words
Butt joint to splice rods located in end alignment with the ends being spaced by a gap (26) comprising a plurality of wires (4, 14, 24) of high tensile strength material placed adjacent said rods (1, 2, 21, 22) to be spliced and bridging the gap (26) between the ends of said rods, said wires extending beyond the gap and substantially parallel to said rods; and a tubular sleeve (3, 13, 23) of deformable material extending over said wires and being compressed and cold flowed over said wires and said rods to be spliced and tightly gripping said rods and said wires.
Claim 3
Dependent Claim
34 words
Joint according to claim 1, wherein said tubular sleeve is slightly double-conical, with the major diameter of the cone lying approximately over the region of the ends of said rods to be spliced together.
Claim 4
Dependent Claim
31 words
Joint according to claim 1, wherein said wires have their approximate midpoint at the ends of said rods and beneath said sleeve and extend essentially in parallel to both said rods.
Claim 5
Dependent Claim
44 words
Joint according to claim 1, wherein said wires have a diameter small with respect to the diameter of the rods to be joined; and a sufficient number of said wires are provided to essentially totally cover the circumference of said rods to be joined.
Claim 6
Dependent Claim
101 words
Joint according to claim 1, wherein said tubular sleeve has an outer surface, said outer surface being formed with projecting ribs overlying said rods and leaving a rib-free zone (28) in the region of the sleeve bridging the gap between the ends of said rods, said ribs (25) having the compressive force (A'') applied thereto during cold flowing; whereby, upon application of pressure to cold flow said sleeve against the rods, direct pressure will not be applied to the zone overlying the ends of said rods tending to change the gap between the ends of said rods during said cold flowing.
Claim 7
Dependent Claim
25 words
Joint according to claim 1, wherein said sleeve is cold flowed over the ends of the wires and against the rods to be spliced together.
Claim 8
Dependent Claim
93 words
Connection assembly to form the connection of claim 1, said connection assembly comprising a tubular sleeve having a length which is large with respect to the gap between the rods and a plurality of high tensile strength wires of a diameter small with respect to the inner diameter of the sleeve and of similar length as the axial length of the sleeve to bridge the gap between said rods and lie parallel to and alongside the rods beneath the sleeve, and of sufficient number to approximately cover the inner surface of said sleeve.
Claim 9
Dependent Claim
105 words
Assembly according to claim 7, wherein said tubular sleeve is formed with ring-like ribs (25) at its outer surface, said ribs lying on both sides of a median zone (28) of said sleeve and adapted to overly the ends of the rods to be joined together, so that the zone (28) overlying the ends of said rods will be free of ribs; whereby, upon application of pressure to cold flow said sleeve, against said ribs, direct pressure will not be applied to the zone overlying the ends of said rods and tending to change the gap between the ends of said rods during cold flowing.
Claim 10
Dependent Claim
104 words
Butt joint to splice rods located in end alignment comprising a plurality of wires (4, 14, 24) of high tensile strength material placed adjacent said rods 1, 2, 21, 22 to be spliced and bridging the ends of said rods; and a tubular sleeve (3) of deformable material extending over said wires and being compressed and cold flowed over said wires and said rods to be spliced, and tightly gripping both said rods and said wires, said tubular sleeve being slightly double-conical with the major diameter of the cone lying approximately over the region of the ends of said rods to be spliced together.
Claim 11
Dependent Claim
104 words
Butt joint to splice rods located in end alignment comprising a plurality of wires (4, 14, 24) of high tensile strength material placed adjacent said rods 1, 2, 21, 22 to be spliced and bridging the ends of said rods; and a tubular sleeve (3) of deformable material extending over said wires and being compressed and cold flowed over said wires and said rods to be spliced, and tightly gripping both said rods and said wires, said tubular sleeve being slightly double-conical with the major diameter of the cone lying approximately over the region of the ends of said rods to be spliced together.
Claim 12
Dependent Claim
30 words
Joint according to claim 9, wherein said wires have their approximate midpoint at the ends of said rods and beneath said sleeve and extend essentially in parallel to each other.
Claim 13
Dependent Claim
117 words
Connection assembly to form the connection of claim 9, said connection assemBly comprising a tubular sleeve of slightly double-conical form with the major diameter of the cone lying approximately over the region of the ends of the rods to be spliced together, and having a length which is large with respect to its diameter; and a plurality of high tensile strength wires of a diameter small with respect to the inner diameter of the sleeve and of similar length as the axial length of the sleeve to bridge the ends of said rods and lie parallel to and alongside the rods beneath the sleeve, and of sufficient number to approximately cover the inner surface of said sleeve.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |