angle coupling in a sentence

1. His patents on the invention published in 1996 and 1997, and, summarize its design, stating, " An adjustable angle coupling secures the yoke to the mounting assembly and permits rotation of the yoke about an axis directed orthogonally through the spindle such that the paper roll can be oriented to unroll paper either from over or from under the roll as desired ."
2. It's difficult to find angle coupling in a sentence.