Clamping tool

Details Clamping tool Clamping tool

1977-02-17

1978-08-15

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5731, 811241, B25B 2900

Patent

active

041063716

ABSTRACT:
A clamping or power wrench tool for tightening a bolt, nut and the like comprising a power shaft engaging the bolt, nut and the like, a driving power source of electromotive, pneumatic or hydraulic type, an anti-reaction force member for the prevention of rotation of the tool case due to the reaction force, a harmonic drive mechanism as the speed reduction mechanism between the power shaft and the driving power source, planetary gear device provided between the harmonic drive mechanism and the power shaft, a first mechanism engaged with a nut screwed to a torque set bolt and rotating the nut with the rotation of the power shaft thereby tightening the nut, a second mechanism engaged to the torque set bolt in such a way as to break the torque set bolt at a predetermined position when the tightening torque arrives at a predetermined value in the course of the clamping and a knock out mechanism which discharges the broken piece of the torque set bolt out of the case by means of a spring force.

REFERENCES:
patent: 2506835 (1950-05-01), Johnson
patent: 2704952 (1955-03-01), Mooter
patent: 3041902 (1962-07-01), Wing
patent: 3222954 (1965-12-01), Wuertz
Harmonic Drive, United Shoe Machinery, p. 12, 1962.

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