Joints and connections – Distinct end coupler – Plural opposed sockets
Patent
1987-09-28
1991-11-26
Cuomo, Peter M.
Joints and connections
Distinct end coupler
Plural opposed sockets
403314, F16B 718
Patent
active
050678442
ABSTRACT:
A position coupler for connecting reinforcing bar in concrete construction where neither bar is able to rotate either conveniently or not at all includes a sleeve at least a portion of which is internally cylindrically threaded and which receives at least one split collar insert. The insert has external cylindrical threads which match the internal cylindrical threads of the sleeve and also has internal tapered threads which match the tapered external threads on the bars to be joined. The inserts, in addition to being longitudinally split are provided with either a transverse slot or a hex head on their outer ends to receive a wrench. When a transverse slot is provided a spanner wrench may be inserted between the bar and sleeve. The tightening of the insert creates a wedge action which hoop stresses the sleeve locking the parts together and reduces slippage. The insert may be locked anywhere along the interior of the cylindrical thread portion of the sleeve to connect bars at different axial spacings. In a preferred form the sleeve is machined from stock with the cylindrical threads receiving the insert being formed on one end while the opposite end is provided with a taper thread socket having taper threads which match the external tapered threads of the bars to be joined. In another embodiment the sleeve is formed of tube with the internal cylindrical threads extending the length of the sleeve and an insert for each bar is employed.
REFERENCES:
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patent: 3201158 (1965-08-01), Meripol
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patent: 3415552 (1968-12-01), Howlett
patent: 3514140 (1970-05-01), Ely et al.
patent: 3850535 (1974-11-01), Howlett et al.
patent: 4047388 (1977-09-01), Howlett
Bowmer Geoffrey M.
Groth John E.
Cuomo Peter M.
Erico International Corporation
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