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(11) | EP 1 484 135 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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| (54) |
Ratchet wrench Ratschenschlüssel Clé à cliquet |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
Field of Invention
Background of Invention
[0002] Taiwanese Patent Publication No. 380471 discloses a conventional wrench including an annular head 20 and a grip 21 extending from the annular head 20. The annular head 20 defines a space 22, a recess 23 communicated with the space 22, a hole 24 communicated with the recess 23, a hole 25 co-centrically communicated with the hole 24 and a hole 26 eccentrically communicated with the hole 24. The space 22 partially overlaps the hole 24. A clutch is put in the recess 23. The clutch includes two claws 40 and a spring 43 between the claws 40. Each of the claws 40 includes a toothed face 41 and a rod 42. An annular gear 30 is put in the space 22. The annular gear 30 includes a toothed internal face 31 for engagement with a nut or a head of a bolt and a toothed external face 33 for engagement with the toothed face 41 of one of the claws 40. A positioning device 60 is put in the hole 26. The positioning device 60 includes a spring 61 and a ball detent 62. A disc 50 is put in the hole 24. The disc 50 includes a central hole 51 through which a bolt is driven into the hole 25. A recess 52 and two recesses 53 are defined in a lower face of the disc 50. The rods 42 are put in the recess 52. The recess 52 includes two opposite walls in contact with the rods 42. The ball detent 62 can be put in one of the recesses 53. A handle 54 is secured to the disc 50. However, the annular gear 30 is likely to escape the space 22 since it is retained only by means of a portion of the disc 50.
[0003] The present invention is therefore intended to obviate or at least alleviate the problem encountered in prior art.
Summary of Invention
[0005] According to the present invention, a wrench includes a handle, a clutch, a detent, a controller, a gear and a C-ring. The handle includes an annular head defining a circular space, a pothole not overlapping the circular space, a channel for communicating the circular space with the pothole, a recess and an annular groove both defined in a wall of the circular space. The clutch includes two claws put in the recess and a spring put between the claws. Each of the claws includes a toothed face and a rod. The claws can easily be put into the recess since the rods can be moved through the channel. A controller is put rotationally in the pothole for moving the rods. The gear is put in the circular space. The gear includes a toothed face for engagement with the toothed face of one of the claws. The C-ring includes an external edge put in the annular groove, an internal edge for retaining the annular gear in the circular space and a gate projecting from an upper face for blocking the channel.
[0006] Other objects, advantages and novel features of the invention will become more apparent from the following detailed description in conjunction with the attached drawings.
Brief Description of Drawings
[0007] The present invention will be described via detailed illustration of embodiments referring to the drawings.
[0008] Figure 1 is a perspective view of a wrench according to a first embodiment of the present invention.
[0012] Figure 5 is an exploded view of a wrench according to a second embodiment of the present invention.
[0013] Figure 6 is an exploded view of a wrench according to a third embodiment of the present invention.
Detailed Description of Embodiments
[0014] Referring to Figures 1~4, a wrench 1 according to a first embodiment of the present invention includes a handle 10, an annular gear 20, a clutch 30 and a controller 40.
[0015] The handle 10 includes an annular head 11 and a grip (not numbered) extending from the annular head 11.
[0016] The annular head 11 defines a space 12 and a pothole 13. The space 12 is in the form of a large circle. The pothole 13 is in the form of a small circle not overlapping the large circle. The space 12 is communicated with the pothole 13 through a channel 15. A recess 14 and an annular groove 16 are defined in the wall of the space 12. The recess 14 is communicated with the pothole 13. A hole 17 is defined in the bottom of the pothole 13.
[0017] The clutch 30 is put in the recess 14. The clutch 30 includes two claws 31 and a spring 32 between the claws 31. Each of the claws 31 includes a toothed face 33 and a rod 34. The claws 31 can be put into the recess 14 since the rods 34 can be moved through the channel 15.
[0019] The controller 40 is put in the pothole 13. The controller 40 includes a disc 41 and a C-ring 42. The disc 41 includes a recess 43 and two recesses 44 all defined in a lower face. The rods 34 are put in the recess 43. The recess 43 includes two opposite walls for contact with the rods 42. The ball detent 19 can be put in one of the recesses 44. A ridge 45 is formed on an upper face of the disc 41. The disc 41 defines an annular groove 46 so as to receive an internal edge of the C-ring 42. The wall of the pothole 13 defines an annular groove 47 so as to receive an external edge of the C-ring 42.
[0020] The annular gear 20 is put in the space 12. The annular gear 20 includes a toothed internal face (not numbered) for engagement with a nut or a head of a bolt and a toothed external face 22 for engagement with the toothed face 33 of one of the claws 31.
[0021] A C-ring 21 includes a gate 23 projecting from an upper face. The C-ring 21 includes an external edge put in the annular groove 16 and an internal edge for retaining the annular gear 20 in the space 12. The channel 15 is shut by means of the gate 21.
[0022] Figure 5 shows a wrench 1 according to a second embodiment of the present invention. In the second embodiment, the disc 41 includes a rod 48 projecting from the lower face. An annular groove 49 is defined in the rod 48. The rod 48 is inserted through an aperture 50 defined in the bottom of the pothole 13. A C-clip 51 includes an internal edge put in the annular groove 49 and an external edge for abutment against the annular head 11. The second embodiment is otherwise identical to the first embodiment.
[0023] Figure 6 shows a wrench 1 according to a third embodiment of the present invention. In the third embodiment, the disc 41 includes a hole 52 defined in the lower face. A bolt 53 is driven into the hole 52 through the aperture 50. A gear 24 is put in the space 12. The gear 24 includes an insert 25 projecting from a lower face. The insert 25 can be fit in a socket (not shown) that can receive a nut or a head of a bolt.
[0024] An annular groove 49 is defined in the rod 48. The rod 48 is inserted through an aperture 50 defined in the bottom of the pothole 13. A C-clip 51 includes an internal edge put in the annular groove 49 and an external edge for abutment against the annular head 11. The third embodiment is otherwise identical to the second embodiment.
[0025] The present invention has been described via detailed illustration of embodiments. Those skilled in the art can derive variations from the embodiments without departing from the scope of the present invention. Therefore, the embodiments shall not limit the scope of the present invention defined in the claims.
□ a handle (10) including an annular head (11) defining a circular space (12), a pothole (13) not overlapping the circular space (12), a channel (15) for communicating the circular space (12) with the pothole (13), a recess (14) and an annular groove (16) both defined in a wall of the circular space (12);
□ a clutch (30) including two claws (31) put in the recess (14) and a spring (32) put between the claws (31), the claws (31) each including a toothed face (33) and a rod (34), wherein the claws (31) can easily be put into the recess (14) since the rods (34) can be moved through the channel (15);
□ a controller (40) put rotationally in the pothole (13) for moving the rods (34);
□ a gear (20; 24) put in the circular space (12), the gear (20; 24) including a toothed face (22) for engagement with the toothed face (33) of one of the claws (31); and
□ a C-ring (21) including an external edge put in the annular groove (16), an internal edge for retaining the annular gear (20) in the circular space (12) and a gate (23) projecting from an upper face for blocking the channel (15).
une poignée (10) comportant une tête annulaire (11) définissant un espace circulaire (12), une cuvette (13) ne débordant pas sur l'espace circulaire (12), un canal (15) permettant de faire communiquer l'espace circulaire (12) avec la cuvette (13), une cavité (14) et une rainure annulaire (16) toutes deux définies dans une paroi de l'espace circulaire (12) ;
un embrayage (30) comportant deux mâchoires (31) placées dans la cavité (14) et un ressort (32) placé entre les mâchoires (31), les mâchoires (31) comportant chacune une face dentée (33) et un ergot (34), les mâchoires (31) pouvant être aisément mises dans la cavité (14), puisque les ergots (34) peuvent être déplacés dans le canal (15) ;
un élément de commande (40) disposé à rotation dans la cuvette (13) pour déplacer les ergots (34) ;
une roue dentée (20 ; 24) placée dans l'espace circulaire (12), la roue dentée (20 ; 24) comportant une face dentée (22) destinée à se mettre en prise avec la face dentée (33) de l'une des mâchoires (31);et
un anneau en C (21) comportant un bord extérieur placé dans la rainure annulaire (16) et un bord intérieur destiné à retenir la roue annulaire (20) dans l'espace circulaire (12).
einen Handgriff (10), umfassend einen ringförmigen Kopf (11), der einen runden Raum (12) definiert, ein Topfloch (13), das den runden Raum (12) nicht überlappt, einen Kanal (15) zum Verbinden des runden Raums (12) mit dem Topfloch (13), eine Vertiefung (14) und eine ringförmige Nut (16), wobei beide in der Wand des runden Raumes (12) definiert sind;
eine Kupplung (30), umfassend zwei Klauen (31), die in die Vertiefung (14) eingesetzt werden, und eine Feder (32), die zwischen den Klauen (31) eingesetzt ist, wobei jede der Klauen (31) eine gezahnte Fläche (33) und eine Stange (34) umfasst, wobei die Klauen (31) leicht in die Vertiefung (14) eingesetzt werden können, da die Stangen (34) durch den Kanal (15) bewegt werden können;
ein Regler (40), der drehend in das Topfloch (13) zum Bewegen der Stangen (34) eingesetzt ist;
ein Zahnrad (20; 24), das in den runden Raum (12) eingesetzt ist, wobei das Zahnrad (20; 24) eine gezahnte Fläche (22) zum Eingriff mit der gezahnten Fläche (33) einer der beiden Klauen (31) umfasst; und
einen C-Ring (21), umfassend eine äußere Kante, welche in die ringförmige Nut (16) eingesetzt wird, eine innere Kante zum Zurückhalten des ringförmigen Zahnrades (20) im runden Raum (12) und einen Ansatz (23), welcher von einer oberen Fläche vorragt, zum Blockieren des Kanals (15).