Patent ID: 6330843
Filing Date: 2001-12-18
Classification: B25B

Abstract:
A ratchet screwdriver comprising:a handle having a front end;a ratchet seat body having a fastening portion fastened to said front end of said handle, said ratchet seat body having an axial hole formed at a front end thereof, said ratchet seat body having a heart hole formed interior thereof at an end of said axial hole, said ratchet seat body having an insertion slot formed at an underside of a front section of said ratchet seat body, said ratchet seat body having a slide slot in a midsection thereof, said slide slot in being in communication with said axial hole, said slide slot having slide edges on respective opposite sides thereof, said ratchet seat body having a threaded mouth at said front end thereof;a rotary shaft rod having a fitting mouth at a front end thereof, said rotary shaft rod having a first gear and a second gear at a tail section thereof, said rotary shaft rod having a projecting pillar pivotally received in said heart hole, said first gear and said second gear being a projecting pillar pivotally received in said heart hole, said first gear and said second gear being received in said axial hole of said ratchet seat body;a stop plate disposed in said axial hole and cooperative with said first gear;an anti-reverse plate slidably mounted on said slide edges of said slide slot, said anti-reverse plate having two anti-reverse edges mounted to said first gear and said second gear, said anti-reverse plate having a locating pillar formed thereon;a dial knob seat disposed over said anti-reverse plate, said locating pillar of said anti-reverse plate, said dial knob seat having a dial block at a top thereof, said dial knob having locating points formed thereon;a recovery spring fitted over said fitting tube and positioned between said dial knob seat and said anti-reverse plate;a housing means covering said ratchet seat body for preventing said stop plate from slipping out of said insertion slot, said housing means having a slot corresponding in location to said dial block of said dial knob seat, said slot of said housing means having a plurality of locating edges corresponding respectively to said locating points;a lock member having a threaded portion engaged with said threaded mouth and suitable for preventing said housing means from disengagement with said ratchet seat body, said lock member having a receiving hole formed therein; anda screw tip received in said fitting mouth of said rotary shaft rod.