Patent ID: 8528273

Claim:
A combination comprising: a first washer portion having a first aperture through which a threaded fastener passes, a surface surrounding said aperture to engage a coupling plate; and a second washer portion, having a second aperture through which the fastener passes, the second washer portion having a surface surrounding the second aperture positioned to abut the surface of the first washer portion and to be urged into contact therewith upon tensioning of the fastener; a first concrete element; a ferrule embedded in the first concrete element and including a threaded passage extending inwardly of the first concrete element to be threadably engaged by the threaded fastener; a second concrete element adjacent the first concrete element; the coupling plate having a pair of spaced plate apertures to provide for the coupling of the first and second concrete elements; and the surface of said second washer portion extends beyond the first aperture when the surfaces abut, the first aperture is dimensioned to provide for relative movement between the first and second washer portions with the first and second apertures and one of the spaced plate apertures aligned to provide for the insertion of the threaded fastener therethrough, with said second washer portion located between the head of the fastener and the first washer portion, and said surfaces have cooperating projections and recesses that inhibit relative movement between the first and second washer portions when the threaded fastener is tensioned urging the surface of said second washer portion against the surface of said first portion securing the first concrete element to the second concrete element.