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US 4,362,423 AGranted
Coupling for coil-thread rebar
AssigneeWilliams Form Engineering Corporation
InventorWendell J. Miles
Life of this patent
Estimating the term…
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.
Claims5
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.
Dependencies are inferred from the claim text.