Patent ID: 6253642
Filing Date: 2001-07-03
Classification: B25B

Abstract:
A power tool for tightening and loosening a bolt connected with a nut and a washer arranged so that the nut banks with one of its sides onto one of washer faces, the power tool comprising a housing; drive means accommodated in said housing; and at least two coaxial connecting means including a first connecting means provided on said drive means for engaging and turning said nut and subjected to a turning force in one direction, and a second connecting means provided on said housing and subjected to a turning force in an opposite direction, said coaxial connecting means being formed so that one of said coaxial connecting means is being turned while the other of said two coaxial connecting means stand still depending on a turning friction encountered as a result of one being connected with said washer while the other one is connected with said nut, or as a result of one being connected with said bolt and the other one is connected with said nut, or as a result of one being connected with a reaction arm adapted to abut against an adjacent stationary object while the other one is connected with said nut, said second connecting means include two connecting means both provided on said housing axially spaced from one another and connectable either with said washer, or with said bolt, or with the reaction arm.