US4362423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling for coil-thread rebar
Assignee: WILLIAMS FORM ENGINEERING Corp A CORP OF MI
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Filing: 1980-09-08
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Granted: 1982-12-07
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Expires: 2000-09-08
Abstract
Abstract This coupling device locks together overlapped lengths of coil-thread rebar by positively interengaging segments of the device with the threading of the respective rebar rods, and positively interengaging the segments themselves for alignment, and to complete the stress transfer.
Inventors
- 👤 Wendell J. Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:33
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/16; E04C5/162; E04C5/163; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/5761; Y10T403/5766; Y10T403/5773; Y10T403/70; Y10T403/7045; Y10T403/71; Y10T403/7129; Y10T403/7141; Y10T403/7152
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
In combination with a pair of overlapped rods each having a regular pattern of protrusions and indentations on the side surfaces thereof, a coupling device comprising: a pair of blocks each having substantially parallel grooves for laterally receiving overlapped portions of said rods, said grooves having surfaces providing a mating configuration to the surfaces of said rods establishing an interlock between said rods and blocks for transfer of axial forces from one of said rods to the other thereof, said blocks having laterally interengaging portions for alignment of said blocks with respect to each other; and a sleeve adapted to fit closely around the assembly of said rods and blocks to hold said blocks in engagement with said rods.
Claim 2
Dependent Claim
119 words
In combination with a pair of overlapped rods each having a regular pattern of protrusions and indentations on the side surfaces thereof, a coupling device comprising: a pair of blocks each having substantially parallel grooves for laterally receiving overlapped portions of said rods, said grooves having surfaces providing a mating configuration to the surfaces of said rods establishing an interlock between said rods and blocks for transfer of axial forces from one of said rods to the other thereof, said blocks having laterally interengaging portions for alignment of said blocks with respect to each other; and a sleeve adapted to fit closely around the assembly of said rods and blocks to hold said blocks in engagement with said rods.
Claim 3
Dependent Claim
12 words
A combination as defined in claim 1, wherein said blocks are identical.
Claim 4
Dependent Claim
21 words
A combination as defined in claim 1, wherein said grooves position said rods for interengagement of said rod protrusions and indentations.
Claim 5
Dependent Claim
22 words
A combination as defined in claim 1, wherein said sleeve is a tubular member adapted to axially interengage and surround said assembly.
Claim 6
Dependent Claim
37 words
A combination as defined in claim 4, wherein said sleeve is provided with at least one deformable tab capable of being bent to form an abutment limiting axial movement of said sleeve with respect to said assembly.
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) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |