Ratchet wrench

Details Ratchet wrench Ratchet wrench

1998-07-01

1999-11-23

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

81 5729, B25B 1346

Patent

active

059880228

ABSTRACT:
A ratchet wrench including a handle and at least one fitting wheel rotatably mounted at one end of the handle. A middle section of outer side of the fitting wheel is formed with multiple annularly arranged teeth. A spiral rod is rotatably connected with two pivot sections of the handle near the fitting wheel. The spiral rod meshes with the teeth of the fitting wheel. One end of the spiral rod abuts against an intermediate member for reducing frictional force between the spiral rod and one of the pivot sections. The other end of the spiral rod is engaged with the other of the pivot sections. The spiral rod can cooperate with the teeth of the fitting wheel by any angle so that the handle of the ratchet wrench can be rotated by any angle without limitation of pitch.

REFERENCES:
patent: 2764048 (1956-09-01), Thompson
patent: 5533427 (1996-07-01), Chow

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