Adjustable torque wrench

Details Adjustable torque wrench Adjustable torque wrench

1983-11-15

1985-09-17

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

B25B 23142

Patent

active

045413134

ABSTRACT:
A tool, such as the torque wrench shown, has a fixed tube 2 and rotatable coaxial handle 9 which serves to move nut 5 longitudinally by means of screw 6, thus adjusting the compression of spring 4. The torque value is indicated by a scale 14 rotatable in housing 11 and viewable through window 13 which includes a cursor. The scale 14 is an extension of the dynamic spline 16 fixed to the tube 2 and wave generator comprising two flats 18, on the end 10 of handle 9, which press the splines into engagement at discrete locations. For every revolution of handle 9 the scale on member 14 will be moved a distance corresponding to one tooth pitch where the difference in the number of teeth 16 and 15 is one.

REFERENCES:
patent: 3355970 (1967-12-01), Knudsen et al.

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