Torque screwdriver

Details Torque screwdriver Torque screwdriver

2006-12-19

2006-12-19

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

C081S473000

Reexamination Certificate

active

07150212

ABSTRACT:
A torque screwdriver including a handle formed with a window. An indicator is disposed in the handle near the window. A scale is axially movably mounted in the handle. The scale is drivingly connected with a compression mechanism disposed at one end of the handle and a resilient mechanism. The scale is drivable by the compression mechanism to compress the resilient mechanism. The compression distance is obtainable by means of observing the relative positions between the indicator and the scale through the window. The resilient mechanism is drivingly connected with an axially slidable lower toothed tray for transmitting the torque to an upper toothed tray pivotally mounted at the other end of the handle. The upper toothed tray is drivable by the lower toothed tray to output the torque.

REFERENCES:
patent: 2969660 (1961-01-01), Dale et al.
patent: 3535958 (1970-10-01), Larson
patent: 3876369 (1975-04-01), Behrens
patent: 4346633 (1982-08-01), Rendl
patent: 4901610 (1990-02-01), Larson et al.
patent: 6131489 (2000-10-01), Yang
patent: 6155147 (2000-12-01), Dzieman
patent: 6640674 (2003-11-01), Rinner et al.
patent: 7013769 (2006-03-01), Chen
patent: 2006/0016300 (2006-01-01), Bubel

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