Patent ID: 7150212
Filing Date: 2006-12-19
Classification: B25B

Abstract:
1. A torque screwdriver comprising a main body formed with an elongated passage and a window communicating with the passage, a first scale member being disposed in the main body near the window, a pair of parallel rails being axially formed on a wall of the passage, a first toothed tray being pivotally mounted in front section of the passage, the first toothed tray having a tool-coupling socket in which a driving tool is installable for outputting torque, a second toothed tray being slidably fitted in the rails for engaging with the first toothed tray, the second toothed tray being connected with a resilient mechanism including a first gasket, a second gasket and a spring positioned between the two gaskets, the second gasket being connected with a second scale member slidably fitted in the rails, the second scale member being drivable by a compression mechanism, whereby the relative positions of the first and second scale members can be seen through the window for adjusting the torque to a necessary value.