Torque-controlling wrench

Details Torque-controlling wrench Torque-controlling wrench

2007-02-27

2007-02-27

Ackun, Jr., Jacob K. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

C073S862230

Reexamination Certificate

active

11504737

ABSTRACT:
A torque-controlling wrench includes a handle, a socket-driving unit installed on the handle and a torque-controlling device. The torque-controlling device includes a rod installed in the handle and connected to the socket-driving unit, a knob installed on the handle and a spring compressed between the rod and the knob so that the knob can be turned to adjust a force exerted on the rod by the spring. An intermediate mechanism includes a first roller connected to the rod, a frame connected to the spring, a wheel installed on the frame and engaged with the roller and a second roller installed on the frame and engaged with the wheel. The centers of the first and second rollers are located on a same side of a vertical line passing a center of the wheel.

REFERENCES:
patent: 4898068 (1990-02-01), Neuhaus
patent: 5859371 (1999-01-01), Hsieh
patent: 7111532 (2006-09-01), Wu

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