Electric hand tool for turning threaded components, e.g. nuts and bolts, has a drive and endless belt which partially wrap the head or body of the item by pivoting arms

摘要

The threaded nut, bolt head or shank (14) of a component is rotated by a belt (11) driven by a shaft (4) which is pressed towards the component to cause arms (7,8) to pivot about pins (9,10) to bring revolving wheels (5,6,12,13) into contact as an electric motor drives the shaft.