Tension alert hand tool

Details Tension alert hand tool Tension alert hand tool

2007-05-02

2008-08-05

Shakeri, Hadi (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

C081S475000

Reexamination Certificate

active

07406900

ABSTRACT:
A tension alert hand tool comprises a driving portion being installed with a buckling unit; the buckling unit being installed with an elastic unit; a handle being formed with a receiving groove for receiving the buckling unit and the elastic unit; a surface of the handle being formed with an through hole; and a tension alarm device having a sensor switch and an alarm unit; the sensor switch being installed in the receiving groove; the alarm unit being installed in the through hole of the handle; the sensor switch being conductive to the alarm unit; when the sensor switch is touched by the buckling unit, the sensor switch will actuate the alarm unit to light up. The tool is an opener or a spanner. The buckling unit includes an upper teethed block and a lower teethed block; and the upper teethed block is movable along the lower teethed block.

REFERENCES:
patent: 2442359 (1948-06-01), Hattan
patent: 2512032 (1950-06-01), Mellert
patent: 4517865 (1985-05-01), Huang
patent: 6487943 (2002-12-01), Jansson et al.
patent: 6526853 (2003-03-01), Jenkins
patent: 7093522 (2006-08-01), Guy et al.

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