Fluid-operated tool

Details Fluid-operated tool Fluid-operated tool

1999-05-03

2000-09-05

Scherbel, David A.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5744, 81 60, B25B 1346

Patent

active

061126225

ABSTRACT:
A fluid-operated tool for tightening and loosening threaded connectors has a ratchet unit including a ratchet connectable with a threaded connector to be tightened and loosened and provided with a plurality of teeth, and a pawl engageable in and disengageable from the teeth of the ratchet, a drive connected with the ratchet and movable over an advance stroke to turn the ratchet when the pawl engages the teeth of the ratchet so as to turn a threaded connector connected with the ratchet for tightening or loosening, and a retract stroke in which the pawl is disengaged from the teeth of the ratchet, and a unit for sensing when the pawl falls into engagement with a tooth of the ratchet and in response reversing the drive from the retract stroke to the advance stroke.

REFERENCES:
patent: 4201099 (1980-05-01), Junkers
patent: 4406185 (1983-09-01), Junkers
patent: 4409865 (1983-10-01), Krautter et al.
patent: 4644829 (1987-02-01), Junkers
patent: 5005447 (1991-04-01), Junkers
patent: 5103696 (1992-04-01), Beuke
patent: 5388478 (1995-02-01), Castle

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