A & J
Reversible ratchet wrench
A reversible ratchet wrench includes a casing fastened to a tool handle to hold a tool bit holder shank and a tool bit at the shank, a forward control ratchet wheel and a backward control ratchet wheel concentrically mounted in the casing and supported on a respective spring means, a stop control ratchet wheel coupled to the tool bit holder shank for synchronous motion and forced by spring means into engagement with the forward control ratchet wheel and the backward control ratchet wheel, and a rotary control knob mounted on the casing and turned between a first position where the stop control ratchet wheel is maintained meshed with the forward control ratchet wheel and the backward control ratchet wheel, a second position where the forward control ratchet wheel is disengaged from the stop control ratchet wheel for enabling the tool bit holder shank to be rotated with the stop control ratchet wheel in one direction, and a third position where the backward control ratchet wheel is disengaged from the stop control ratchet wheel for enabling the tool bit holder shank to be rotated with the stop control ratchet wheel in the reversed direction.
B
B25B
inventional
Song-Ming Yu-Chun
Lee Lee