Torsion wrench with display unit for displaying torsion force li

Details Torsion wrench with display unit for displaying torsion force li Torsion wrench with display unit for displaying torsion force li

1995-09-20

1996-07-23

Chilcot, Richard

Measuring and testing

Dynamometers

Responsive to torque

81479, G01L 524

Patent

active

055378773

ABSTRACT:
A torsion wrench includes a tubular casing, a drive unit pivoted to the casing and adapted to engage a workpiece, a knocker for generating an alarm sound when torsion force that is applied by the drive unit on the workpiece reaches a predetermined torsion force limit, a biasing unit for biasing the knocker toward the drive unit, and an adjusting unit for adjusting initial biasing force of the biasing unit. The biasing unit includes a push piece and a spring disposed between the push piece and the knocker. The adjusting unit includes a tubular handle member which has a connecting end sleeved rotatably on one end of the casing, and a push rod unit having a first end portion extending into the handle member and a second end portion extending into the casing and connected to the push piece. Rotation of the handle member results in axial movement of the push rod unit in the casing. A torsion force detecting unit includes a sensor unit for generating an electrical signal corresponding to position of the push piece in the casing, a converter circuit for converting the electrical signal into a digital reading of the predetermined torsion force limit, and a display unit for displaying the digital reading thereon.

REFERENCES:
patent: 2300652 (1942-11-01), Cooney
patent: 4664001 (1987-05-01), Denman
patent: 4765064 (1988-08-01), Maeda
patent: 5435190 (1995-07-01), Jansson et al.

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