Wrench for tightening pipe nuts

Details Wrench for tightening pipe nuts Wrench for tightening pipe nuts

2007-11-13

2009-12-15

Meislin, D. S (Department: 3727)

Tools

Wrench, screwdriver, or driver therefor

Machine

C081S056000

Reexamination Certificate

active

07631580

ABSTRACT:
A wrench for tightening threaded male and female pipe nuts includes a wrench gear rotatable within a housing and having a nut slot so that the wrench gear can be engaged upon one of the nuts. A pair of pinion drive gears engage with gear teeth of the wrench gear at spaced apart locations on the periphery so that at least one of the pinion drive gears is engaged with the wrench gear at all times during rotation of the wrench gear to tighten the one nut. A nut holding plate has a nut slot and is mounted on the housing by a pin and slot arrangement so that the nut holding plate can shift to enable the nut holding plate to be engaged upon the other nut and hold the other nut stationary while the wrench gear is rotated to tighten the one nut.

REFERENCES:
patent: 5460062 (1995-10-01), Wilson, Jr.
patent: 5697266 (1997-12-01), Wilson, Jr.
patent: 6935209 (2005-08-01), Lantow et al.
patent: 7287447 (2007-10-01), Pettit, Jr.
patent: 2004/0250658 (2004-12-01), Liao

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