A Cook County jury rendered a defense verdict in favor of a crane manufacturer after a civil engineer sustained several injuries in 2014 when a one-ton jib extension fell from a crane and struck him.The verdict was reached Wednesday after about a monthlong trial before Circuit Judge Thomas V. Lyons II.On Dec. 1, 2014, Rudolf Das, then an employee with K&S Engineers, was working on the Fox River Bridge Project along the Jane Addams Memorial Tollway in Elgin when an accessory jib — a structure that extends the …