Open end wrench capable of fast driving

1. An open end wrench capable of fast driving a workpiece, with the workpiece including first, second, third, fourth, fifth, and sixth sides respectively having first, second, third, fourth, fifth, and sixth faces in a first rotating direction and respectively having first, second, third, fourth, fifth, and sixth force-receiving faces in a second rotating direction, with the open end wrench comprising, in combination:

a body including a handle and a jaw portion formed on an end of the handle, with spaced first and second jaws formed on an end of the jaw portion opposite to the handle, with the jaw portion further including an arcuate sliding groove facing the wrenching space, with the sliding groove including spaced, first and second support walls and an arcuate sliding wall extending between the first and second support walls, with a guide fixed in the sliding groove;

a slide slideably received in the sliding groove between an extended position and a retracted position, with the slide including a first side having an arcuate sliding face slideable along the sliding wall of the sliding groove, with the slide further including a second side opposite to the first side of the slide and located outside of the sliding groove, with the second side of the slide including a first wrenching face, with the first wrenching face adapted to correspond to the fourth force-receiving face in the first rotating direction of the workpiece when the slide is in the extended position, with the slide further including a top face and a bottom face, with the slide further including an arcuate guiding slot extending from the top face through the bottom face, with the guide received in the guiding slot, preventing the slide from disengaging from the sliding groove, with the guiding slot including a pressing end; and

an elastic device having two ends respectively abutting the guide and the pressing end of the guiding slot for biasing the slide to the extended position,

the first wrenching face of the slide including first and second wings respectively extending away from the top and bottom faces of the first wrenching face, with each of the first and second wings including an inner face and an outer face, with the first and second jaws and the first wrenching face and the inner faces of the first and second wings of the slide together define a curve of a circle having a center located on an axis of the workpiece, allowing the first and second jaws and the first wrenching face and the first and second wings of the slide to rotate about the workpiece and allowing the first wrenching face and the first and second wings to slide along a circumference of a circumscribed circle of the workpiece without interference, with a spacing formed between the outer face of each of the first and second wings and one of the first and second support walls, with the spacings avoiding operational interference to sliding movement of the slide in the sliding groove while the first and second jaws and the first wrenching face and the first and second wings of the slide rotate about the workpiece.

2. The open end wrench as claimed in claim 1 , with the jaw portion including a throat intermediate the first and second jaws, with the throat and the first and second jaws together defining a wrenching space adapted for receiving the workpiece, with the first jaw including a force-applying face facing the wrenching space and facing a front end of the second jaw, with the force-applying face adapted to correspond to the first force-receiving face in the first rotating direction of the workpiece.

3. The open end wrench as claimed in claim 1 , with the guide having two ends fixed to the first and second support walls.

4. The open end wrench as claimed in claim 1 , with the guiding slot including an abutting end, with the abutting end being in contact with the guide when the slide is in the extended position.

5. The open end wrench as claimed in claim 1 , with the slide further including a second wrenching face at an angle of 120° to the first wrenching face, with the second wrenching face adapted to correspond to the third force-receiving face in the first rotating direction of the workpiece.

6. The open end wrench as claimed in claim 5 , with the slide further including an evasive portion between the first and second wrenching faces, with the evasive portion of the slide adapted to allow entrance of the third force-receiving face in the second rotating direction of the workpiece.

7. The open end wrench as claimed in claim 1 , with the sliding face of the slide having a first curvature, with the sliding wall of the sliding groove having a second curvature equal to the first curvature, with the sliding face of the slide smoothly slideable along the sliding wall of the sliding groove, with the sliding face adapted to transmit reactive force from the workpiece to the sliding wall and to avoid concentration of stress on the slide, increasing torque bearing capacity of the slide when the workpiece is driven by the body to rotate.

8. The open end wrench as claimed in claim 7 , with the guiding slot having a third curvature equal to the second curvature, allowing relative smooth, arcuate sliding between the guiding groove of the slide and the guide in the sliding groove without operational interference therebetween.

9. The open end wrench as claimed in claim 1 , with the top face of the slide slideably abutting the first support wall of the sliding groove, with the bottom face of the slide slideably abutting the second support wall of the sliding groove, with the top and bottom faces symmetrically supported by the first and second support walls.

10. The open end wrench as claimed in claim 1 , with the first and second jaws and the jaw portion integrally formed as a single and inseparable component of a same material.

11. The open end wrench as claimed in claim 1 , with the throat including a push face facing the wrenching space, with the push face at an angle of 120° to the force-applying face of the first jaw, with the push face of the throat adapted to correspond to the second force-receiving face in the first rotating direction of the workpiece.

12. The open end wrench as claimed in claim 11 , with the second jaw including first and second faces, with the first face of the second jaw facing the wrenching space and the throat, with the second face of the second jaw facing the wrenching space and a front end of the first jaw, with the first face of the second jaw at an angle of 120° to the second face of the second jaw, with the first and second faces adapted to correspond respectively to the fourth and third force-receiving faces in the first rotating direction of the workpiece, with the first face of the second jaw parallel to the force-applying face of the first jaw, with a first evasive portion formed between the force-applying face of the first jaw and the push face of the throat, with the first evasive portion adapted to allow entrance of the first force-receiving face in the second rotating direction of the workpiece, with a second evasive portion formed between the push face of the throat and the second face of the second jaw, with the first evasive portion adapted to allow entrance of the second force-receiving face in the second rotating direction of the workpiece, with the jaw portion further including a third evasive portion between first and second faces of the second jaw, with third evasive portion adapted to allow entrance of the third force-receiving face in the second rotating direction of workpiece.

13. The open end wrench as claimed in claim 1 , with the elastic device including an elastic element received in the guiding slot of the slide, with the first and second support walls of the sliding groove parallel to each other and having a spacing therebetween, with the top and bottom faces of the slide parallel to each other and having a height in a height direction of the slide equal to the spacing between the first and second support walls, with the guiding slot of the slide having a height in the height direction of the slide equal to the height of the slide, with the guiding slot having a width in a width direction perpendicular to the height direction of the guiding slot, with the width of the guiding slot equal to a diameter of the guide, with the height of the guiding slot larger than 1.5 times the width of the guiding slot, with the elastic element received in the guiding slot having a height in the height direction of the slide not larger than the height of the guiding slot, with the height of the elastic element larger than the width of the guiding slot and larger than 0.5 times the height of the guiding slot.

14. An open end wrench capable of fast driving a workpiece, with the workpiece including an outer periphery having first, second, third, fourth, fifth, and sixth sides respectively having first, second, third, fourth, fifth, and sixth faces in a first rotating direction and respectively having first, second, third, fourth, fifth, and sixth force-receiving faces in a second rotating direction, with the open end wrench comprising, in combination:

a body including a handle and a jaw portion formed on an end of the handle, with spaced first and second jaws formed on an end of the jaw portion opposite to the handle, with the first and second jaws and the jaw portion integrally formed as a single and inseparable component of a same material, with the jaw portion further including a throat intermediate the first and second jaws, with the first jaw including a front end and a rear end, with the rear end of the first jaw connected to the throat, with the second jaw including a front end and a rear end, with the rear end of the second jaw connected to the throat, with the throat and the first and second jaws together defining a wrenching space, with the wrenching space adapted to receive the workpiece, with the first jaw including a force-applying face facing the wrenching space, with the jaw portion further including an arcuate sliding groove facing the wrenching space, with the sliding groove including spaced, first and second support walls and an arcuate sliding wall extending between the first and second support walls, with a guide fixed in the sliding groove, with the guide including two ends fixed in the first and second support walls;

a slide slideably received in the sliding groove, with the slide including a first side having an arcuate sliding face slideable along the sliding wall of the sliding groove, with the slide capable of driving the workpiece or sliding along the outer periphery of the workpiece, with the slide movable between an extended position and a retracted position, with the slide further including a second side opposite to the first side of the slide, with the second side of the slide located outside of the sliding groove and including a first wrenching face located on a front end of the slide, with the slide further including a top face and a bottom face, with the top face slideably abutting the first support wall, with the bottom face slideably abutting the second support wall, with the top and bottom faces symmetrically supported by the first and second support walls, with the slide further including an arcuate guiding slot extending from the top face through the bottom face, with the guide received in the guiding slot, preventing the slide from disengaging from the sliding groove, with the guiding slot including an abutting end and a pressing end, with the front end of the slide including first and second wings respectively extending away from the top and bottom faces, with each of the first and second wings including inner and outer faces, with the inner faces of the first and second wings adapted to drive the workpiece; and

an elastic device mounted in the guiding slot and having two ends respectively abutting the guide and the pressing end of the guiding slot, with the elastic device urging the abutting end of the guiding slot to contact with the guide, biasing the slide to the extended position,

with the inner faces of the first and second wings adapted to contact with the outer periphery of the workpiece received in the wrenching space to increase a contact area between the workpiece and the slide, with the outer faces of the first and second wings spaced from the body to avoid friction between the body and the first and second wings, allowing smooth sliding movement of the slide between the extended position and the retracted position.

15. The open end wrench as claimed in claim 14 , with the first wrenching face including a top extension face extending away from the top face and a bottom extension face extending away from the bottom face, with the top and bottom extension faces coplanar to the first wrenching face and located on the inner faces of the two wings.

16. The open end wrench as claimed in claim 15 , with the first and second jaws and the first wrenching face and the top and bottom extension faces of the slide together defining a curve of a circle having a center located on an axis of the workpiece, with the first and second jaws and the first wrenching face and the top and bottom extension faces of the slide rotatable along about the center of the workpiece, with the first wrenching face and the top and bottom extension faces slideable along a circumference of a circumscribed circle of the workpiece without interference.

17. The open end wrench as claimed in claim 14 , with the sliding wall of the sliding groove free of holes, grooves, and recesses and having a concave, arcuate face, with the sliding face of the slide free of holes, grooves, and recesses and having a convex, arcuate face, and with the guiding slot free of holes, grooves, and recesses.

18. The open end wrench as claimed in claim 14 , with the force-applying face facing the front end of the second jaw, with the sliding groove formed in the second jaw and the throat and facing the wrenching space, with the force-applying face adapted to correspond to the first force-receiving face in the first rotating direction of the workpiece, with the first wrenching face and the two wings of the slide adapted to correspond to the fourth force-receiving face in the first rotating direction of the workpiece when the slide is in the extended position.

19. The open end wrench as claimed in claim 14 , with the sliding face of the slide having a first curvature, with the sliding wall of the sliding groove having a second curvature equal to the first curvature, with the sliding face of the slide smoothly slideable along the sliding wall of the sliding groove, with the sliding face adapted to transmit reactive force from the workpiece to the sliding wall and to avoid concentration of stress on the slide, increasing torque bearing capacity of the slide when the workpiece is driven by the body to rotate, with the guiding slot having a third curvature equal to the second curvature, allowing relative smooth, arcuate sliding between the guiding groove of the slide and the guide in the sliding groove without operational interference therebetween.

20. The open end wrench as claimed in claim 14 , with the slide further including a second wrenching face at an angle of 120° to and located behind the first wrenching face, with the second wrenching face adapted to correspond to the third force-receiving face in the first rotating direction of the workpiece, with the slide further including an evasive portion between the first and second wrenching faces, with the evasive portion of the slide adapted to allow entrance of the third force-receiving face in the second rotating direction of the workpiece.

21. The open end wrench as claimed in claim 20 , with the throat including a push face facing the wrenching space, with the push face at an angle of 120° to the force-applying face of the first jaw, with the push face of the throat adapted to correspond to the second force-receiving face in the first rotating direction of the workpiece.

22. The open end wrench as claimed in claim 21 , with the second jaw including first and second faces, with the first face of the second jaw facing the wrenching space and the rear end of the first jaw, with the second face of the second jaw facing the wrenching space and the front end of the first jaw, with the first face of the second jaw at an angle of 120° to the second face of the second jaw, with the first and second faces of the second jaw adapted to correspond respectively to the fourth and third force-receiving faces in the first rotating direction of the workpiece, with the first face of the second jaw parallel to the force-applying face of the first jaw, with a first evasive portion formed between the force-applying face of the first jaw and the push face of the throat, with the first evasive portion adapted to allow entrance of the first force-receiving face in the second rotating direction of the workpiece, with a second evasive portion formed between the push face of the throat and the second face of the second jaw, with the second evasive portion adapted to allow entrance of the second force-receiving face in the second rotating direction of the workpiece, with the jaw portion further including a third evasive portion between first and second faces of the second jaw, with third evasive portion adapted to allow entrance of the third force-receiving face in the second rotating direction of workpiece.

23. The open end wrench as claimed in claim 14 , with the elastic device including an elastic element received in the guiding slot, with the first and second support walls of the sliding groove parallel to each other and having a spacing therebetween, with the top and bottom faces of the slide parallel to each other and having a height in a height direction of the slide equal to the spacing between the first and second support walls, with the guiding slot of the slide having a height in the height direction of the slide equal to the height of the slide, with the guiding slot having a width in a width direction perpendicular to the height direction of the guiding slot, with the width of the guiding slot equal to a diameter of the guide, with the height of the guiding slot larger than 1.5 times the width of the guiding slot, with the elastic element having a height in the height direction of the slide not larger than the height of the guiding slot, with the height of the elastic element larger than the width of the guiding slot and larger than 0.5 times the height of the guiding slot.

24. The open end wrench as claimed in claim 23 , with the elastic element being one of a resilient plate, a compression spring, a torsion spring, and a dual compression spring, with the dual compression spring having spaced upper and lower coil portions and a connecting portion between the upper and lower coil portions, with the upper and lower coil portions spaced in the height direction of slide.

25. The open end wrench as claimed in claim 14 , with the elastic device including a base and two compression springs, with the base including two protrusions spaced in a height direction of the slide or two receptacles spaced in the height direction of the slide, with each of the two compression springs having an end mounted to one of the two protrusions or one of the two receptacles, with the two compression springs spaced in the height direction of the slide.