The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 1991
Filed:
Sep. 28, 1987
Geoffrey M Bowmer, Oisterwijk, NL;
John E Groth, Cleveland Heights, OH (US);
Erico International Corporation, Solon, OH (US);
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.