Tightening device

Details Tightening device Tightening device

1987-04-15

1989-04-18

Schmidt, Frederick R.

Tools

Including tool driving by impact delivering component or...

Motor or gear driven

81 5729, 173 936, B25B 1900

Patent

active

048216119

ABSTRACT:
By transferring the power fed from a motor to a ratchet mechanism through means of an impact clutch mechanism, a relatively large torque is obtained by the impact clutch mechanism. In addition when a torque greater than a predetermined level is applied to the ratchet mechanism, reaction is never given to the operator's hand because the impact clutch mechanism does not transfer a force greater than the present torque to the ratchet mechanism, thus permitting safe operation. With the ratchet mechanism, moreover, it becomes possible to effect such operation as first loosening and removing by the operator's force such members as bolts and nuts which have been additionally tightened independently or strongly tightened to a level in excess of a certain torque preset for the device.

REFERENCES:
patent: 2564224 (1951-08-01), Mitchell et al.
patent: 3389623 (1968-06-01), Gill
patent: 4346630 (1982-08-01), Hanson

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