EP2255927A2 - Ratchetable open-ended wrench - Google Patents
Ratchetable open-ended wrench Download PDFInfo
- Publication number
- EP2255927A2 EP2255927A2 EP20100153675 EP10153675A EP2255927A2 EP 2255927 A2 EP2255927 A2 EP 2255927A2 EP 20100153675 EP20100153675 EP 20100153675 EP 10153675 A EP10153675 A EP 10153675A EP 2255927 A2 EP2255927 A2 EP 2255927A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- jaw
- wall
- driving
- wrench
- auxiliary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 210000000078 claw Anatomy 0.000 description 13
- 230000009471 action Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/02—Spanners; Wrenches with rigid jaws
- B25B13/08—Spanners; Wrenches with rigid jaws of open jaw type
Definitions
- the present invention claims priority of the European patent application No. EP09159662 filed on May 7, 2009 .
- the invention relates to a ratchetable open-ended wrench which allows application of sequential back and forth strokes to a rotatable workpiece W without removing the wrench from the workpiece, and more particularly to a ratchetable open-ended wrench that achieves a "smooth, continuous operation" for the operators when retracting a workpiece W with sequential back and forth strokes.
- a ratchetable open-ended wrench is known as an improved hand tool which not only achieves the functions of conventional open-ended wrench but also provides the advantage of ratchetable operation.
- Patent Nos. TW228757 , TW278060 , TW327619 , US5533428 ( WO9615879 ), TWM310772 , US7111529 , US7077035 and US3165015 are also provided with similar ratchetable operation mechanism, such as Patent Nos. TW501515 , TW511564 , US7010999 , TW262313 , and US2,879,681 .
- TW228757 discloses an open-ended wrench which allows application of sequential back and forth strokes for driving a screw/workpiece.
- the wrench relies on a pair of retractable claws/jaws (2, 3) parallel to each other and disposed in the wrench head, which move along the same direction as a pair of drive springs coupled to the claws/jaws. Therefore, TW228757 , which is characterized by the retractable claws/jaws (2, 3) moving back or forth along the activation direction of the springs, can rotate a screw clockwise, and turn back in a counterclockwise direction without rotating the screw.
- a wrench needs the counterforce or friction from the retractable claws/jaws, which are abutted against the screw, to tighten or loosen the screw.
- the retractable claws/jaws (2, 3) of the wrench of TW228757 are formed with toothed surfaces which are parallel to each other to contact a parallel pair of sides of the screw so as to rotate the same.
- the problem with the wrench is that, since the toothed surfaces of the jaws are substantially parallel to each other and are not perpendicular to the screw sides, the tightening/loosening performance of the wrench is poor, and the toothed structure can be easily abraded after long-term usage.
- the jaw opening (the opening between the jaws) of the wrench must be made larger than the size of the screw/workpiece to be driven, and the retractable claws/jaws (2, 3) may be continuously abraded during operation. Therefore, such a wrench is inconvenient in use. Nevertheless, the through slots (111,121) accommodating the claws/jaws weaken the wrench head structure.
- US5533428 ( WO9615879 ) and TW327619 remedy some of the above defects by providing a wrench providing a single L-shaped retractable claw/jaw 15 which moves in the same direction as a driving spring coupled therewith within a slot 23 inward facing a base portion of the wrench driving head which is near a handle 21, with a modified driving head structure.
- the retractable jaw 15 has a second engaging surface 14 in parallel to a first engaging surface 13 on a first jaw 11.
- the problem with this wrench is that, during the wrench "reverse rotation" at which the nut is not rotated, the wrench cannot be operated smoothly.
- the wrench reverse rotation is easily held up because a corner 75 of the nut 60 will block the retracting action of the retractable jaw 15 may tend to block the retractable jaw member 15.
- the inventions provide a chamfered edge 16 between forward surface 30 and engaging surface 14 to allow for improved ratchetability of the retractable jaw 15 to alleviate the above problem, there remain some other defects.
- the driving opening of the wrench driving head is characterized by a complicated structure including bearing surface 50 and recesses 51-53 which are not smoothly connected to each other, and the jaw opening must be larger than the nut/screw/workpiece to be driven, which results in an increased weight of the wrench and inaccurate sizing of jaw opening.
- US6,637,300 ( TW501515 ), US7,010,999 ( TW200637692 ) and TW511564 issued to Arthur Wu disclose ratchetable adjustable spanners which adopt "pivot-type claw/jaws.”
- US6637300 discloses slots 14 which laterally penetrate a fixed jaw 11, and rotatable devices (pivoted jaws) 40, 66 with a symmetrical, paired structure pivotally fixed in said two slots 14, so that the rotatable devices 40, 66 can be clamped between stopping portions 15.
- the wrench can tighten/loosen a screw in one direction, and turn back without rotating the screw in the opposite direction.
- US6637300 has the following disadvantages: (1) The rotatable devices (pivoted claws) 40, 66 are complicated by providing symmetrical, T-shaped and paired structures. (2) The rotatable devices 40, 66 clamped between the two stopping portions 15 cannot be retracted into the slots 14 receiving said rotatable devices 40,60, so the wrench driving opening must be made larger, which results in an increased weight, and the ratachetable structure can only be used with an "adjustable spanner" instead of an "open-ended wrench.” (3) The springs 50, 67 are disposed on a pivot, so the rebounding force of the rotatable devices 40, 66 is small, and the operation performance is not good.
- the slot 14 for accommodating the rotatable devices 40, 66 penetrates the head portion of the wrench, which weaken the strength of the wrench head.
- TW511564 and US7,010,999 ( TW 200637692 ) change the through slot 14 of US6,637,300 to an arcuated, C-shaped opening to acquire a higher strength, and change the "rotatable devices (pivoted claws) 40, 66" of TW501515 with "driving rollers” activated by springs.
- driving rollers are big, however.
- the fixed jaw must be made larger.
- the present invention is directed to a ratchetable open-ended wrench, which includes a handle for a hand to grasp, a wrench head located on one end of the handle, and a fastener room located in the wrench head for accommodating a workpiece to be rotated.
- the invention discloses a ratchetable open-ended wrench for turning a workpiece having a drive end with at least one pair of opposed contact edges, comprising:
- the ratchetable open-ended wrench may be constructed by the same principle such that the second jaw includes a rear-end wall which is disposed adjacent the base portion of the wrench head and includes a second driving wall, both the rear-end wall and the second driving wall being disposed in a second plane; and that an auxiliary jaw includes a driving surface, the auxiliary jaw being slidably received in the second jaw such that the driving surface of the auxiliary jaw extends outwardly into the drive opening, wherein the auxiliary jaw is slidably received in the second jaw between the second driving wall and the rear-end wall.
- the wrench head may be constructed that it includes a first jaw having a first driving wall, a second jaw having a second driving wall facing the first driving wall, an inner wall extending from the second driving wall toward the inside portion of the second jaw, a fastener-jaw concavity, an auxiliary jaw retracting opening, an auxiliary jaw elastically and longitudinally slidable along the auxiliary jaw retracting opening, and an auxiliary jaw limiting member coupled with the limiting slot.
- the auxiliary jaw further includes an exterior end having a pillow in contact with the inner wall and a pushing surface for working together with the first jaw to grip and rotate the workpiece, an interior end, and a limiting slot.
- FIGs. 1A to 1B are schematic three-dimensional views of the present invention.
- FIG. 2A is a schematic view of the present invention showing the structure near the auxiliary jaw
- FIG. 2B is a plane view of Fig. 1B of the present invention.
- FIGs. 3A to 3E are schematic views showing the wrench reverse rotation operation during which the workpiece is not rotated according to the present invention.
- FIGs. 1A to 2B a preferred embodiment of a ratchetable open-ended wrench 1 for turning a rototable workpiece W is shown.
- the "workpiece” refers to, for example, a fastener like screw/nut, or any other hand tool having a polygonal driven part and capable of being driven by a wrench.
- the workpiece W hereinafter only stands for to the driven part of the workpiece W (e.g., a bolt head or a driven end of an adaptor) that is driven by the wrench.
- the ratchetable open-ended wrench 1 substantially comprises a handle H for a hand to grasp and a wrench head 100 for rotating the workpiece W, which includes a drive opening therein and located on one end of the handle H.
- the wrench head 100 preferably includes a first jaw 110 having a first driving wall 114, a second jaw 120 substantially extending from a base portion 200 of the wrench head 100 adjoining the handle to a free end 122, and a fastener room 160 located in the drive opening of the wrench head 100 for accommodating the workpiece W to be rotated.
- the first jaw 110 is preferably formed with a recessed portion 112 capable of accommodating the angled portion of the workpiece W is an inner section (a section away from the first driving wall 114) thereof (see FIG. 2A ) to facilitate smooth operation during the reverse rotation of the wrench at which the workpiece W is not rotated.
- the recessed portion 112 of the first jaw 110 may be omitted, and the inside portion of the second jaw 120 is made larger so as to accommodate the workpiece W during the reverse rotation of the wrench without rotating the workpiece W.
- the weight of the wrench is increased, the functions of the wrench of the present invention can still be achieved.
- the second jaw 120 comprises:
- the inner wall 126 is preferably formed with a slot having a U-shaped cross-section so as to allow the auxiliary jaw 140 to slide thereon.
- the U-shaped slot extends from the auxiliary jaw retracting opening 130 toward the jaw opening 170 and has a longitudinal opening facing the auxiliary jaw 140. Therefore, the auxiliary jaw 140 can be partly embraced in the U-shaped inner wall 126 during its movement in the slot.
- the rear-end wall 127 is preferably arranged in a way that it does not exceed a half of a workpiece contact edge WS that is adjacent to the base portion 200 (i.e., the rear-end wall 127 does not exceed an inner half portion of the workpiece contact edge WS). Accordingly, when the open-ended wrench 1 is used to roatate a workpiece W, the rear-end wall 127 will share a part of the torque required to drive the workpiece W; whereas when the open-ended wrench 1 is ratcheted back with no loosening/tightening action, the rear-end wall 127 will not obstruct the movement of the auxiliary jaw 140 relative to the associated contact edge WS of the workpiece W.
- the smallest width between the rear-end wall 127 and the first driving wall 114 of the first jaw 110 is approximately the size of the workpiece W.
- the auxiliary jaw 140 preferably comprises a pillow 142 facing the inner wall 126 for contacting/abutting it and a "fastener contact surface" for contacting the workpiece W.
- the "fastener contact surface” comprises a driving surface 143 and a pushing surface 144.
- the minimum width between the "fastener contact surface" thereof and the first driving wall 114 of the first jaw 110 is substantially equal to the size of the workpiece W.
- the driving surface 143 substantially faces a workpiece contact edge WS of the workpiece W to be rotated, so that it can work with the first jaw 110 to grip the workpiece W and apply a force (torque) thereto during operation.
- the driving surface 143 is preferably formed with corrugations shown in the drawings or similar friction structure to obtain a better gripping force.
- the pushing surface 144 is substantially directed toward the drive opening and adjacent to the portion of the workpiece contact edge WS that is away from the base portion 200 (which means that the pushing surface 144 faces an outer portion of the contact edge WS, as shown in FIG.
- the pushing surface 144 preferably includes a gentle cambered/curved surface.
- the driving surface 143 is connected to the pushing surface 144 preferably by a smooth cambered/curved surface.
- the "fastener contact surface" of the auxiliary jaw 140 extends with a curved surface from the driving surface 143 to the pushing surface 144 (that is, the pushing surface 144 itself has a cambered/curved surface, and the pushing surface 144 is connected to the driving surface 143 by a cambered/curved surface), thereby making the workpiece W smoothly slide from the driving surface 143 to the pushing surface 144.
- users who tighten/loosen the workpiece W by the ratchetable open-ended wrench 1 of the present invention can perform a series of smooth, continuous operation steps, including inserting the ratchetable open-ended wrench 1 to the workpiece W, rotating the workpiece W by the wrench 1, and ratcheting the wrench 1 back without loosening/tightening the workpiece W.
- prior art references such as US5533428 and US7111529 in which the back-ratcheting rotation require a series of sequential partial-turn strokes which are not continuous or smooth due to the complicated wrench head structures (in these patents, users must partially "move” the wrench during back-ratcheting operation of the wrench to find appropriate positions for force application), the present invention significantly improves back-ratcheting operation of the wrench.
- the open-ended wrench 1 of the present invention when the open-ended wrench 1 of the present invention is the driving operation, the rear-end wall 127 and the driving surface 143 of the auxiliary jaw 140 work together to provide the torque required to drive the workpiece W; whereas when the open-ended wrench 1 is ratcheted back with no loosening/tightening action, the pushing surface 144 of the auxiliary jaw 140 can be pushed by the outer portion of the contact edge WS of the workpiece W and the end of rear-end wall 127 will not obstruct the movement of the auxiliary jaw 140 relative to the associated contact edge WS of the workpiece W. Therefore, a smooth operation of the open-ended wrench 1 can be obtained no matter if it is in the driving operation or reverse operation.
- the limiting slot 148 is preferably in the form of a longitudinal notch located on one side of the auxiliary jaw 140, and defined between a shoulder 154 of the pillow 142, a shoulder 156 of the interior end 146, and the inner wall 126.
- the limiting slot 148 is a notch having a U-shaped structure near a side of the auxiliary jaw 140, and is surrounded by the inner wall 126 so as to work as a groove/slot.
- the auxiliary jaw limiting member 150 is coupled in the limiting slot 148, so that auxiliary jaw 140 moves between a first position (at which the auxiliary jaw 140 is unbiased by the workpiece W and fully extended by the spring S) and a second position (in which the auxiliary jaw 140 is biased and fully compressed by the workpiece W), due to the blocking of the shoulders 154 and 156.
- the limiting slot 148 is a longitudinal notch substantially located in the auxiliary jaw 140 and spaced a distance (not shown) from the periphery of the auxiliary jaw 140 and the inner wall 126.
- the included angle between the driving surface 143 and a longitudinal centerline of the auxiliary jaw 140 is made as small as possible, so that when the user uses the ratchetable open-ended wrench 1 to rotate (tighten or loosen) the workpiece W, at least a large part of or the overall torque on the auxiliary jaw 140 is converted into a component force along the radial direction of the auxiliary jaw 140.
- the pushing surface 144 of the auxiliary jaw 140 extends from an end adjacent to the inner wall 126 to the driving surface 143 preferably shaped as a gentle cambered/curved surface.
- a direction of force application between the contact edge WS of the workpiece W and the pushing surface 144 is mostly or almost parallel to the longitudinal centerline of the auxiliary jaw 140 (or of the auxiliary jaw retracting opening 130), so all or most of the force applied to the pushing surface 144 can be parallel to the longitudinal centerline of the auxiliary jaw 140, thus reducing the abrasion between the pillow 142 and the inner wall 126.
- the fastener room 160 is used to accommodate the workpiece W to be rotated, which is substantially located between the auxiliary jaw 140 and the first driving wall 114, and adjoins the concavity 128.
- the fastener room 160 and the concavity 128 work together in such a way that they form a working space which is sufficiently large to allow the workpiece W to remain therein for a turn of the wrench head 100/handle H, e.g., a full 360-degree turn or a back turn without rotating the workpiece W. Therefore, whenever the ratchetable open-ended wrench 1 is operated to rotate the workpiece W or is ratcheted back without rotating the same, there is no need to remove the wrench 1 from the workpiece W. That is, the steps of rotating the workpiece W by the wrench 1 and ratcheting the wrench 1 back without rotating the workpiece W can be completed with the workpiece W remaining in the working space formed by the fastener room 160 and the concavity 128.
- a jaw opening 170 is defined between the first driving wall 114 of the first jaw 110 and the second driving wall 124 of the second jaw 120.
- the width of the jaw opening 170 is substantially the same as the size of the workpiece W to be rotated, so that the first jaw 110 together with the second jaw 120 may tighten/loosen the workpiece W as a typical open-ended wrench.
- the ratchetable open-ended wrench 1 can be manufactured with less material, and can be applied to small-sized wrenches for small workpieces W. Further, as indicated above, according to the present invention, the minimum width between the "fastener contact surface" of the auxiliary jaw 140 and the first driving wall 114 of the first jaw 110 may be substantially equal to the size of the workpiece W.
- the overall operation including gripping the workpiece W with the jaw opening 170 of the ratchetable open-ended wrench 1, rotating the workpiece W by the wrench 1, ratcheting the wrench 1 back without loosening/tightening the workpiece W, and again rotating the workpiece W again, is very smooth.
- Another advantage is that the auxiliary jaw retracting opening 130 of the present invention is formed in the base portion 200, which does not need the cover plates of US7,111,529 or a welding process.
- FIGs. 3A to 3G are schematic views showing how the back-ratcheting movement of ratchetable open-ended wrench 1 without loosening/tightening the workpiece W is achieved.
- the workpiece W is a hexagonal nut, so each back-ratcheting movement of wrench 1 around an angle of workpiece W requires a turn of 60°, as illustrated in FIGs. 3A to 3G.
- FIGs. 3A-3B, 3B-3C, 3C-3D and 3D-3G show the relative positions between the auxiliary jaw 140 and the contact edge WS of the workpiece W each time the wrench head 100 turns back 10°.
- FIG. 3A-3B, 3B-3C, 3C-3D and 3D-3G show the relative positions between the auxiliary jaw 140 and the contact edge WS of the workpiece W each time the wrench head 100 turns back 10°.
- the auxiliary jaw 140 reaches the first position in which the workpiece W does not longitudinally bias the auxiliary jaw 140, with the driving surface 143 preferably close to the contact edge WS. In this position, the auxiliary jaw 140 and the rear-end wall 127 work with the first jaw 110 to grip the nut. Accordingly, if the ratchetable open-ended wrench 1 turns in the clockwise direction, the nut can be tightened/loosened. As shown in FIG.
- the inventions discloses a ratchetable open-ended wrench for turning a workpiece W having a drive end with at least one pair of opposed contact edges WS, comprising:
- the ratchetable open-ended wrench is constructed such that the first driving wall 114 and the rear-end wall 127 are substantially parallel and separated by a first width that is substantially equal to a second width that separates the at least one pair of opposed contact edges WS of the drive end of the fastener from each other.
- the second jaw 120 further comprises a second driving wall 124 such that the auxiliary jaw 140 is slidably received in the second jaw 120 between the second driving wall 124 and the rear-end wall 127.
- the driving surface 143 of the auxiliary pawl 140 and the second driving wall 124 are disposed within the second plane in which the rear-end wall 127 lies when the auxiliary jaw 140 is in a first position in which it is fully extended into the drive opening 100.
- the ratchetable open-ended wrench may be constructed such that the second jaw 120 further comprises a concavity 128 formed by a concave wall that extends from the rear-end wall 127 to the second driving wall 124.
- the fastener is rotatable in the first direction by the first driving wall 114 in combination with the drive surface 143 of the auxiliary jaw 140 and the second driving wall 124 when the drive end of the fastener W is partially received within the drive opening of the wrench head 100 and rotatable in the first direction by the first driving wall 114 in combination with the rear-end wall 127 and the driving surface 143 of the auxiliary pawl 140 when the drive end of the fastener W is fully received within the drive opening of the wrench head 100.
- auxiliary jaw 140 is urged inwardly into the second jaw 120 when the wrench head 100 is rotated about the fastener in a second direction.
- the fastener W is rotatable in the first direction by the first driving wall 114 in combination with the rear-end wall 127 and the driving surface 143 of the auxiliary pawl 140.
- the ratchetable open-ended wrench for turning a workpiece W can be constructed such that it comprises a drive end with at least one pair of opposed contact edges WS, and that it comprises:
- the drive end of the fastener W is slidably receivable in the drive opening of the wrench head 100 such that the fastener W can be rotated in a first direction by the first driving wall 114 and the rear-end wall 127.
- the fastener is rotatable in the first direction by the first driving wall 114 in combination with the drive surface 143 of the auxiliary jaw 140 and the second driving wall 124 when the drive end of the fastener W is partially received within the drive opening of the wrench head 100 and rotatable in the first direction by the first driving wall 114 in combination with the rear-end wall 127 and the driving surface 143 of the auxiliary pawl 140 when the drive end of the fastener W is fully received within the drive opening of the wrench head 100.
- first driving wall 114 and the rear-end wall 127 are substantially parallel and separated by a first width that is substantially equal to a second width that separates the at least one pair of opposed contact edges WS of the drive end of the fastener from each other.
- the ratchetable open-ended wrench can be constructed such that the driving surface 143 of the auxiliary pawl 140 is disposed within the second plane in which the rear-end wall 127 and the second driving wall 124 lie when the auxiliary jaw 140 is in a first position in which it is fully extended into the drive opening 100.
- the second jaw 120 further comprises a concavity 128 formed by a concave wall that extends from the rear-end wall 127 to the second driving wall 124 such that the auxiliary jaw 140 extends outwardly into the concavity 128.
- the ratchetable open-ended wrench can also be constructed such that the auxiliary jaw 140 is urged inwardly into the second jaw 120 when the wrench head 100 is rotated about the fastener in a second direction.
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Abstract
Description
- The present invention claims priority of the European patent application No.
EP09159662 filed on May 7, 2009 - A ratchetable open-ended wrench is known as an improved hand tool which not only achieves the functions of conventional open-ended wrench but also provides the advantage of ratchetable operation. In view of the convenience, efforts and improvements have been made in this field, for example, Patent Nos.
TW228757 TW278060 TW327619 US5533428 (WO9615879 TWM310772 US7111529 ,US7077035 andUS3165015 . Further, some adjustable spanners are also provided with similar ratchetable operation mechanism, such as Patent Nos.TW501515 TW511564 US7010999 ,TW262313 US2,879,681 . -
TW228757 TW228757 TW228757 -
US5533428 (WO9615879 TW327619 - The aforementioned or similar problems exist in various other conventional wrenches, such as TWM310772,
US3,165,015 ,US7,077,035 andUS7,111,529 which use a retractable claw/jaw moving in the same direction as a driving spring coupled therewith. Another common problem of conventional wrenches is that during the tightening/loosening operation, the spring and the retractable claw/jaw directly bear a great torque, which may adversely affect the wrench service life. -
US6,637,300 (TW501515 US7,010,999 (TW200637692 TW511564 US6637300 discloses slots 14 which laterally penetrate a fixed jaw 11, and rotatable devices (pivoted jaws) 40, 66 with a symmetrical, paired structure pivotally fixed in said two slots 14, so that the rotatable devices 40, 66 can be clamped between stopping portions 15. With the above structure, the wrench can tighten/loosen a screw in one direction, and turn back without rotating the screw in the opposite direction. However,US6637300 has the following disadvantages: (1) The rotatable devices (pivoted claws) 40, 66 are complicated by providing symmetrical, T-shaped and paired structures. (2) The rotatable devices 40, 66 clamped between the two stopping portions 15 cannot be retracted into the slots 14 receiving said rotatable devices 40,60, so the wrench driving opening must be made larger, which results in an increased weight, and the ratachetable structure can only be used with an "adjustable spanner" instead of an "open-ended wrench." (3) The springs 50, 67 are disposed on a pivot, so the rebounding force of the rotatable devices 40, 66 is small, and the operation performance is not good. (4) The slot 14 for accommodating the rotatable devices 40, 66 penetrates the head portion of the wrench, which weaken the strength of the wrench head.TW511564 US7,010,999 (TW 200637692 US6,637,300 to an arcuated, C-shaped opening to acquire a higher strength, and change the "rotatable devices (pivoted claws) 40, 66" ofTW501515 - Among various ratchetable wrenches, those with a retractable jaw moving in the same direction as a driving spring coupling therewith are simpler in structure than those with a pivot-type jaw, and thus have a lower cost. However, the conventional design of the former is highly complicated and has the following disadvantages. (1) The retractable jaw must work with a slot penetrating the fixed jaw of the wrench head, which results in a weak wrench head structure that may be easily ruptured under a great torque for a long time. (2) To engage fasteners or workpieces such as screws/nuts, the wrench is provided with a retractable jaw which is usually designed with a complicated engaging surface, or provided with several retractable jaws working together, so the difficulty in and cost of the fabrication are increased. (3) The retractable jaw is not properly designed to bear great force, and is easily broken. (4) The wrench driving opening/fastener room for accommodating a fastener or workpiece such as a screw/nut has a complicated structure, which brings inconvenience during operation.
- Therefore, it is necessary to provide a ratchetable open-ended wrench to eliminate the above disadvantages.
- Accordingly, the present invention is directed to a ratchetable open-ended wrench, which includes a handle for a hand to grasp, a wrench head located on one end of the handle, and a fastener room located in the wrench head for accommodating a workpiece to be rotated. The invention discloses a ratchetable open-ended wrench for turning a workpiece having a drive end with at least one pair of opposed contact edges, comprising:
- a handle with a first end;
- a wrench head including a base portion disposed adjacent the first end of the handle;
- a first jaw extending outwardly from the base portion of the wrench head, the first jaw including a first driving wall disposed in a first plane;
- a second jaw extending outwardly from the base portion of the wrench head such that the first jaw and the second jaw define a drive opening configured to receive the drive end of the fastener, the second jaw including a rear-end wall disposed in a second plane adjacent the base portion of the wrench head; and
- an auxiliary jaw including a driving surface, the auxiliary jaw being slidably received in the second jaw such that the driving surface of the auxiliary jaw extends outwardly into the drive opening and the rear-end wall is disposed between the auxiliary jaw and the base portion of the wrench head,
wherein the drive end of the fastener is slidably receivable in the drive opening of the wrench head such that the fastener can be rotated in a first direction by the first driving wall and the rear-end wall. - The ratchetable open-ended wrench may be constructed by the same principle such that the second jaw includes a rear-end wall which is disposed adjacent the base portion of the wrench head and includes a second driving wall, both the rear-end wall and the second driving wall being disposed in a second plane; and that an auxiliary jaw includes a driving surface, the auxiliary jaw being slidably received in the second jaw such that the driving surface of the auxiliary jaw extends outwardly into the drive opening, wherein the auxiliary jaw is slidably received in the second jaw between the second driving wall and the rear-end wall.
- The wrench head may be constructed that it includes a first jaw having a first driving wall, a second jaw having a second driving wall facing the first driving wall, an inner wall extending from the second driving wall toward the inside portion of the second jaw, a fastener-jaw concavity, an auxiliary jaw retracting opening, an auxiliary jaw elastically and longitudinally slidable along the auxiliary jaw retracting opening, and an auxiliary jaw limiting member coupled with the limiting slot. The auxiliary jaw further includes an exterior end having a pillow in contact with the inner wall and a pushing surface for working together with the first jaw to grip and rotate the workpiece, an interior end, and a limiting slot.
-
FIGs. 1A to 1B are schematic three-dimensional views of the present invention; -
FIG. 2A is a schematic view of the present invention showing the structure near the auxiliary jaw; -
FIG. 2B is a plane view ofFig. 1B of the present invention; and -
FIGs. 3A to 3E are schematic views showing the wrench reverse rotation operation during which the workpiece is not rotated according to the present invention. - In
FIGs. 1A to 2B , a preferred embodiment of a ratchetable open-ended wrench 1 for turning a rototable workpiece W is shown. The "workpiece" refers to, for example, a fastener like screw/nut, or any other hand tool having a polygonal driven part and capable of being driven by a wrench. However, the workpiece W hereinafter only stands for to the driven part of the workpiece W (e.g., a bolt head or a driven end of an adaptor) that is driven by the wrench. The ratchetable open-ended wrench 1 substantially comprises a handle H for a hand to grasp and awrench head 100 for rotating the workpiece W, which includes a drive opening therein and located on one end of the handle H. - The
wrench head 100 preferably includes afirst jaw 110 having afirst driving wall 114, asecond jaw 120 substantially extending from abase portion 200 of thewrench head 100 adjoining the handle to afree end 122, and afastener room 160 located in the drive opening of thewrench head 100 for accommodating the workpiece W to be rotated. - The
first jaw 110 is preferably formed with a recessedportion 112 capable of accommodating the angled portion of the workpiece W is an inner section (a section away from the first driving wall 114) thereof (seeFIG. 2A ) to facilitate smooth operation during the reverse rotation of the wrench at which the workpiece W is not rotated. According to an alternative embodiment, the recessedportion 112 of thefirst jaw 110 may be omitted, and the inside portion of thesecond jaw 120 is made larger so as to accommodate the workpiece W during the reverse rotation of the wrench without rotating the workpiece W. In this alternative embodiment, although the weight of the wrench is increased, the functions of the wrench of the present invention can still be achieved. - The
second jaw 120 comprises: - a
second driving wall 124, formed on thefree end 122 of thesecond jaw 120 and facing thefirst driving wall 114; - an
inner wall 126, extending from thesecond driving wall 124 toward the inside portion of thesecond jaw 120; - a rear-
end wall 127 provided adjacent to thebase portion 200, said rear-end wall 127 facing saidfirst jaw 110 so as to work with saidfirst jaw 110 to clamp a portion of the workpiece W to be rotated; - a
concavity 128 formed between saidsecond driving wall 124 and said rear-end wall 127 and having a wall forming a portion of saidinner wall 126; - an auxiliary
jaw retracting opening 130, which extends from thebase portion 200, faces a jaw opening 170 (which will be explained below) and adjoins theconcavity 128, wherein the auxiliaryjaw retracting opening 130 preferably does not penetrate thesecond jaw 120; - an
auxiliary jaw 140, partially disposed in the auxiliaryjaw retracting opening 130, and elastically (see a spring S in the drawings) and longitudinally slidable along the auxiliaryjaw retracting opening 130; - an
interior end 146 for elastically coupled to the auxiliary jaw retracting opening 130 (with the spring S); - a limiting
slot 148; and - an auxiliary
jaw limiting member 150, extending (from a surface of the second jaw 120) through anopening 152 to the auxiliaryjaw retracting opening 130, and coupled with the limitingslot 148, for confining theauxiliary jaw 140 to move between a first position in which theauxiliary jaw 140 is non longitudinally biased and a second position in which theauxiliary jaw 140 is longitudinally biased. - The
inner wall 126 is preferably formed with a slot having a U-shaped cross-section so as to allow theauxiliary jaw 140 to slide thereon. Specifically, the U-shaped slot extends from the auxiliaryjaw retracting opening 130 toward thejaw opening 170 and has a longitudinal opening facing theauxiliary jaw 140. Therefore, theauxiliary jaw 140 can be partly embraced in the U-shapedinner wall 126 during its movement in the slot. - The rear-
end wall 127 is preferably arranged in a way that it does not exceed a half of a workpiece contact edge WS that is adjacent to the base portion 200 (i.e., the rear-end wall 127 does not exceed an inner half portion of the workpiece contact edge WS). Accordingly, when the open-ended wrench 1 is used to roatate a workpiece W, the rear-end wall 127 will share a part of the torque required to drive the workpiece W; whereas when the open-ended wrench 1 is ratcheted back with no loosening/tightening action, the rear-end wall 127 will not obstruct the movement of theauxiliary jaw 140 relative to the associated contact edge WS of the workpiece W. Preferably, the smallest width between the rear-end wall 127 and thefirst driving wall 114 of thefirst jaw 110 is approximately the size of the workpiece W. - The
auxiliary jaw 140 preferably comprises apillow 142 facing theinner wall 126 for contacting/abutting it and a "fastener contact surface" for contacting the workpiece W. The "fastener contact surface" comprises a drivingsurface 143 and a pushingsurface 144. Preferably, when theauxiliary jaw 140 is located in the first position in which theauxiliary jaw 140 is unbiased and fully extended by spring S, the minimum width between the "fastener contact surface" thereof and thefirst driving wall 114 of thefirst jaw 110 is substantially equal to the size of the workpiece W. The drivingsurface 143 substantially faces a workpiece contact edge WS of the workpiece W to be rotated, so that it can work with thefirst jaw 110 to grip the workpiece W and apply a force (torque) thereto during operation. The drivingsurface 143 is preferably formed with corrugations shown in the drawings or similar friction structure to obtain a better gripping force. The pushingsurface 144 is substantially directed toward the drive opening and adjacent to the portion of the workpiece contact edge WS that is away from the base portion 200 (which means that the pushingsurface 144 faces an outer portion of the contact edge WS, as shown inFIG. 2A ), so that it can be pushed by the outer portion of the contact edge WS of the workpiece W to be rotated when the ratchetable open-ended wrench 1 is ratcheted back with no loosening/tightening action, while at the same time theauxiliary jaw 140 is retracted into the auxiliaryjaw retracting opening 130 as workpiece W enters theconcavity 128. The pushingsurface 144 preferably includes a gentle cambered/curved surface. The drivingsurface 143 is connected to the pushingsurface 144 preferably by a smooth cambered/curved surface. More specifically, the "fastener contact surface" of theauxiliary jaw 140 extends with a curved surface from the drivingsurface 143 to the pushing surface 144 (that is, the pushingsurface 144 itself has a cambered/curved surface, and the pushingsurface 144 is connected to the drivingsurface 143 by a cambered/curved surface), thereby making the workpiece W smoothly slide from the drivingsurface 143 to the pushingsurface 144. With this configuration, when the ratchetable open-ended wrench 1 is ratcheted back without rotating the workpiece W from a gripping position (holding the workpiece W), a smooth, continuous operation can be obtained. Accordingly, users who tighten/loosen the workpiece W by the ratchetable open-ended wrench 1 of the present invention can perform a series of smooth, continuous operation steps, including inserting the ratchetable open-ended wrench 1 to the workpiece W, rotating the workpiece W by the wrench 1, and ratcheting the wrench 1 back without loosening/tightening the workpiece W. Compared with prior art references such asUS5533428 andUS7111529 in which the back-ratcheting rotation require a series of sequential partial-turn strokes which are not continuous or smooth due to the complicated wrench head structures (in these patents, users must partially "move" the wrench during back-ratcheting operation of the wrench to find appropriate positions for force application), the present invention significantly improves back-ratcheting operation of the wrench. - Advantageously, with the above structure, when the open-ended wrench 1 of the present invention is the driving operation, the rear-
end wall 127 and the drivingsurface 143 of theauxiliary jaw 140 work together to provide the torque required to drive the workpiece W; whereas when the open-ended wrench 1 is ratcheted back with no loosening/tightening action, the pushingsurface 144 of theauxiliary jaw 140 can be pushed by the outer portion of the contact edge WS of the workpiece W and the end of rear-end wall 127 will not obstruct the movement of theauxiliary jaw 140 relative to the associated contact edge WS of the workpiece W. Therefore, a smooth operation of the open-ended wrench 1 can be obtained no matter if it is in the driving operation or reverse operation. - The limiting
slot 148 is preferably in the form of a longitudinal notch located on one side of theauxiliary jaw 140, and defined between ashoulder 154 of thepillow 142, ashoulder 156 of theinterior end 146, and theinner wall 126. According to this embodiment, the limitingslot 148 is a notch having a U-shaped structure near a side of theauxiliary jaw 140, and is surrounded by theinner wall 126 so as to work as a groove/slot. With this structure, the auxiliaryjaw limiting member 150 is coupled in the limitingslot 148, so thatauxiliary jaw 140 moves between a first position (at which theauxiliary jaw 140 is unbiased by the workpiece W and fully extended by the spring S) and a second position (in which theauxiliary jaw 140 is biased and fully compressed by the workpiece W), due to the blocking of theshoulders slot 148 is a longitudinal notch substantially located in theauxiliary jaw 140 and spaced a distance (not shown) from the periphery of theauxiliary jaw 140 and theinner wall 126. - Preferably, in order to achieve a better effect, the included angle between the driving
surface 143 and a longitudinal centerline of theauxiliary jaw 140 is made as small as possible, so that when the user uses the ratchetable open-ended wrench 1 to rotate (tighten or loosen) the workpiece W, at least a large part of or the overall torque on theauxiliary jaw 140 is converted into a component force along the radial direction of theauxiliary jaw 140. In another preferred embodiment, the pushingsurface 144 of theauxiliary jaw 140 extends from an end adjacent to theinner wall 126 to the drivingsurface 143 preferably shaped as a gentle cambered/curved surface. With this feature, during the back-ratcheting operation of the wrench 1 without rotating the workpiece W, a direction of force application between the contact edge WS of the workpiece W and the pushingsurface 144 is mostly or almost parallel to the longitudinal centerline of the auxiliary jaw 140 (or of the auxiliary jaw retracting opening 130), so all or most of the force applied to the pushingsurface 144 can be parallel to the longitudinal centerline of theauxiliary jaw 140, thus reducing the abrasion between thepillow 142 and theinner wall 126. - The
fastener room 160 is used to accommodate the workpiece W to be rotated, which is substantially located between theauxiliary jaw 140 and thefirst driving wall 114, and adjoins theconcavity 128. Thefastener room 160 and theconcavity 128 work together in such a way that they form a working space which is sufficiently large to allow the workpiece W to remain therein for a turn of thewrench head 100/handle H, e.g., a full 360-degree turn or a back turn without rotating the workpiece W. Therefore, whenever the ratchetable open-ended wrench 1 is operated to rotate the workpiece W or is ratcheted back without rotating the same, there is no need to remove the wrench 1 from the workpiece W. That is, the steps of rotating the workpiece W by the wrench 1 and ratcheting the wrench 1 back without rotating the workpiece W can be completed with the workpiece W remaining in the working space formed by thefastener room 160 and theconcavity 128. - A
jaw opening 170 is defined between thefirst driving wall 114 of thefirst jaw 110 and thesecond driving wall 124 of thesecond jaw 120. The width of thejaw opening 170 is substantially the same as the size of the workpiece W to be rotated, so that thefirst jaw 110 together with thesecond jaw 120 may tighten/loosen the workpiece W as a typical open-ended wrench. - In prior art references such as
US7,111,529 , in order to provide the function of back-ratcheting rotation without loosening/tightening action, the width of the jaw opening of the wrench must be larger than the workpiece W (i.e., the size of the jaw opening is inconsistent with that of the workpiece W) with the complicated structure of the fastener room and the auxiliary jaw 11 facing the base area 19. Moreover, cover plates 23, 25 and a welding process are required. An advantage of the present invention is that the width of thejaw opening 170 can be made substantially the same size as that of the workpiece W to be rotated. This allows the appearance and size of thewrench head 100 of the ratchetable open-ended wrench 1 of the present invention to be almost identical to those of conventional open-ended wrenches without ratchetable functions. The ratchetable open-ended wrench 1 can be manufactured with less material, and can be applied to small-sized wrenches for small workpieces W. Further, as indicated above, according to the present invention, the minimum width between the "fastener contact surface" of theauxiliary jaw 140 and thefirst driving wall 114 of thefirst jaw 110 may be substantially equal to the size of the workpiece W. Thus, the overall operation, including gripping the workpiece W with thejaw opening 170 of the ratchetable open-ended wrench 1, rotating the workpiece W by the wrench 1, ratcheting the wrench 1 back without loosening/tightening the workpiece W, and again rotating the workpiece W again, is very smooth. Another advantage is that the auxiliaryjaw retracting opening 130 of the present invention is formed in thebase portion 200, which does not need the cover plates ofUS7,111,529 or a welding process. The above advantages are a great improvement as compared with the prior arts. -
FIGs. 3A to 3G are schematic views showing how the back-ratcheting movement of ratchetable open-ended wrench 1 without loosening/tightening the workpiece W is achieved. The workpiece W is a hexagonal nut, so each back-ratcheting movement of wrench 1 around an angle of workpiece W requires a turn of 60°, as illustrated inFIGs. 3A to 3G. FIGs. 3A-3B, 3B-3C, 3C-3D and 3D-3G show the relative positions between theauxiliary jaw 140 and the contact edge WS of the workpiece W each time thewrench head 100 turns back 10°. InFIG. 3A , theauxiliary jaw 140 reaches the first position in which the workpiece W does not longitudinally bias theauxiliary jaw 140, with the drivingsurface 143 preferably close to the contact edge WS. In this position, theauxiliary jaw 140 and the rear-end wall 127 work with thefirst jaw 110 to grip the nut. Accordingly, if the ratchetable open-ended wrench 1 turns in the clockwise direction, the nut can be tightened/loosened. As shown inFIG. 3B , when the ratchetable open-ended wrench 1 turns in the counterclockwise direction, the counterforce applied by the nut to the pushingsurface 144 forces theauxiliary jaw 140 to retract into the auxiliaryjaw retracting opening 130 and travel toward thebase portion 200, in which step theauxiliary jaw 140 moves from the first position to the second position in which theauxiliary jaw 140 is in a fully compressed position closest tobase portion 200. Since the length of the rear-end wall 127 should not obstruct the back-ratcheting operation, it is preferred that the end of the rear-end wall 127 should not exceed the inner half portion of the workpiece contact edge WS of the workpiece W to be rotated. Further, as shown inFIGs. 3C to 3G , by continuing turning the wrench 1 to pass around an angle of the nut (as shown inFIG. 3F ), theauxiliary jaw 140 returns to its first position (as shown inFIG. 3G ) fully extended by the spring S. Thus, the wrench 1 is ready for another tightening/loosening action in the clockwise direction again. In other words: The inventions discloses a ratchetable open-ended wrench for turning a workpiece W having a drive end with at least one pair of opposed contact edges WS, comprising: - a handle H with a first end;
- a
wrench head 100 including abase portion 200 disposed adjacent the first end of the handle H; - a
first jaw 110 extending outwardly from thebase portion 200 of thewrench head 100, thefirst jaw 110 including afirst driving wall 114 disposed in a first plane; - a
second jaw 120 extending outwardly from thebase portion 200 of thewrench head 100 such that thefirst jaw 110 and thesecond jaw 120 define a drive opening configured to receive the drive end of the fastener W, the second jaw including a rear-end wall 127 disposed in a second plane adjacent thebase portion 200 of thewrench head 100; and - an
auxiliary jaw 140 including a drivingsurface 143, theauxiliary jaw 140 being slidably received in thesecond jaw 120 such that the drivingsurface 143 of theauxiliary jaw 140 extends outwardly into the drive opening and the rear-end wall 127 is disposed between theauxiliary jaw 140 and thebase portion 200 of thewrench head 100, - wherein the drive end of the fastener W is slidably receivable in the drive opening of the
wrench head 100 such that the fastener W can be rotated in a first direction by thefirst driving wall 114 and the rear-end wall 127. - Preferably the ratchetable open-ended wrench is constructed such that the
first driving wall 114 and the rear-end wall 127 are substantially parallel and separated by a first width that is substantially equal to a second width that separates the at least one pair of opposed contact edges WS of the drive end of the fastener from each other. - In one embodiment the
second jaw 120 further comprises asecond driving wall 124 such that theauxiliary jaw 140 is slidably received in thesecond jaw 120 between thesecond driving wall 124 and the rear-end wall 127. - Further to this the driving
surface 143 of theauxiliary pawl 140 and thesecond driving wall 124 are disposed within the second plane in which the rear-end wall 127 lies when theauxiliary jaw 140 is in a first position in which it is fully extended into thedrive opening 100. - The ratchetable open-ended wrench may be constructed such that the
second jaw 120 further comprises aconcavity 128 formed by a concave wall that extends from the rear-end wall 127 to thesecond driving wall 124. - In one embodiment the fastener is rotatable in the first direction by the
first driving wall 114 in combination with thedrive surface 143 of theauxiliary jaw 140 and thesecond driving wall 124 when the drive end of the fastener W is partially received within the drive opening of thewrench head 100 and rotatable in the first direction by thefirst driving wall 114 in combination with the rear-end wall 127 and the drivingsurface 143 of theauxiliary pawl 140 when the drive end of the fastener W is fully received within the drive opening of thewrench head 100. - Further to this the
auxiliary jaw 140 is urged inwardly into thesecond jaw 120 when thewrench head 100 is rotated about the fastener in a second direction. - Preferably the fastener W is rotatable in the first direction by the
first driving wall 114 in combination with the rear-end wall 127 and the drivingsurface 143 of theauxiliary pawl 140. - According to the same principle the ratchetable open-ended wrench for turning a workpiece W can be constructed such that it comprises a drive end with at least one pair of opposed contact edges WS, and that it comprises:
- a handle H with a first end;
- a
wrench head 100 including abase portion 200 disposed adjacent the first end of the handle H; - a
first jaw 110 extending outwardly from thebase portion 200 of thewrench head 100, thefirst jaw 110 including afirst driving wall 114 disposed in a first plane; - a
second jaw 120 extending outwardly from thebase portion 200 of thewrench head 100 such that thefirst jaw 110 and thesecond jaw 120 define a drive opening configured to receive the drive end of the fastener W, the second jaw including a rear-end wall 127 disposed adjacent thebase portion 200 of thewrench head 100 and asecond driving wall 124, both the rear-end wall 127 and thesecond driving wall 124 being disposed in a second plane; and - an
auxiliary jaw 140 including a drivingsurface 143, theauxiliary jaw 140 being slidably received in thesecond jaw 120 such that the drivingsurface 143 of theauxiliary jaw 140 extends outwardly into the drive opening,
wherein theauxiliary jaw 140 is slidably received in thesecond jaw 120 between thesecond driving wall 124 and the rear-end wall 127. - Preferably the drive end of the fastener W is slidably receivable in the drive opening of the
wrench head 100 such that the fastener W can be rotated in a first direction by thefirst driving wall 114 and the rear-end wall 127. - Further to this the fastener is rotatable in the first direction by the
first driving wall 114 in combination with thedrive surface 143 of theauxiliary jaw 140 and thesecond driving wall 124 when the drive end of the fastener W is partially received within the drive opening of thewrench head 100 and rotatable in the first direction by thefirst driving wall 114 in combination with the rear-end wall 127 and the drivingsurface 143 of theauxiliary pawl 140 when the drive end of the fastener W is fully received within the drive opening of thewrench head 100. - In one embodiment the
first driving wall 114 and the rear-end wall 127 are substantially parallel and separated by a first width that is substantially equal to a second width that separates the at least one pair of opposed contact edges WS of the drive end of the fastener from each other. - The ratchetable open-ended wrench can be constructed such that the driving
surface 143 of theauxiliary pawl 140 is disposed within the second plane in which the rear-end wall 127 and thesecond driving wall 124 lie when theauxiliary jaw 140 is in a first position in which it is fully extended into thedrive opening 100. - In one embodiment the
second jaw 120 further comprises aconcavity 128 formed by a concave wall that extends from the rear-end wall 127 to thesecond driving wall 124 such that theauxiliary jaw 140 extends outwardly into theconcavity 128. - The ratchetable open-ended wrench can also be constructed such that the
auxiliary jaw 140 is urged inwardly into thesecond jaw 120 when thewrench head 100 is rotated about the fastener in a second direction. - [0028] All the above descriptions are intended to demonstrate the preferred embodiments of the present invention rather than limit the present invention. Since the present invention is not limited to the specific details described in connection with the preferred embodiments, changes to and implementations of certain features of the preferred embodiments without altering the overall basic function of the invention are contemplated within the scope of the appended claims.
Claims (15)
- A ratchetable open-ended wrench for turning a workpiece (W) having a drive end with at least one pair of opposed contact edges (WS), comprising:a handle (H) with a first end;a wrench head (100) including a base portion (200) disposed adjacent the first end of the handle (H);a first jaw (110) extending outwardly from the base portion (200) of the wrench head (100), the first jaw (110) including a first driving wall (114) disposed in a first plane;a second jaw (120) extending outwardly from the base portion (200) of the wrench head (100) such that the first jaw (110) and the second jaw (120) define a drive opening configured to receive the drive end of the fastener (W), the second jaw including a rear-end wall (127) disposed in a second plane adjacent the base portion (200) of the wrench head (100); andan auxiliary jaw (140) including a driving surface (143), the auxiliary jaw (140) being slidably received in the second jaw (120) such that the driving surface (143) of the auxiliary jaw (140) extends outwardly into the drive opening and the rear-end wall (127) is disposed between the auxiliary jaw (140) and the base portion (200) of the wrench head (100),wherein the drive end of the fastener (W) is slidably receivable in the drive opening of the wrench head (100) such that the fastener (W) can be rotated in a first direction by the first driving wall (114) and the rear-end wall (127).
- The ratchetable open-ended wrench according to claim 1,
wherein the first driving wall (114) and the rear-end wall (127) are substantially parallel and separated by a first width that is substantially equal to a second width that separates the at least one pair of opposed contact edges (WS) of the drive end of the fastener from each other. - The ratchetable open-ended wrench according to claim 2,
wherein the second jaw (120) further comprises a second driving wall (124) such that the auxiliary jaw (140) is slidably received in the second jaw (120) between the second driving wall (124) and the rear-end wall (127). - The ratchetable open-ended wrench according to claim 3,
wherein the driving surface (143) of the auxiliary pawl (140) and the second driving wall (124) are disposed within the second plane in which the rear-end wall (127) lies when the auxiliary jaw (140) is in a first position in which it is fully extended into the drive opening (100). - The ratchetable open-ended wrench according to claim 3,
wherein the second jaw (120) further comprises a concavity (128) formed by a concave wall that extends from the rear-end wall (127) to the second driving wall (124). - The ratchetable open-ended wrench according to claim 3,
wherein the fastener is rotatable in the first direction by the first driving wall (114) in combination with the drive surface (143) of the auxiliary jaw (140) and the second driving wall (124) when the drive end of the fastener (W) is partially received within the drive opening of the wrench head (100) and rotatable in the first direction by the first driving wall (114) in combination with the rear-end wall (127) and the driving surface (143) of the auxiliary pawl (140) when the drive end of the fastener (W) is fully received within the drive opening of the wrench head (100). - The ratchetable open-ended wrench according to claim 3,
wherein the auxiliary jaw (140) is urged inwardly into the second jaw (120) when the wrench head (100) is rotated about the fastener in a second direction. - The ratchetable open-ended wrench according to claim 1,
wherein the fastener (W) is rotatable in the first direction by the first driving wall (114) in combination with the rear-end wall (127) and the driving surface (143) of the auxiliary pawl (140). - A ratchetable open-ended wrench for turning a workpiece (W) having a drive end with at least one pair of opposed contact edges (WS), comprising:a handle (H) with a first end;a wrench head (100) including a base portion (200) disposed adjacent the first end of the handle (H);a first jaw (110) extending outwardly from the base portion (200) of the wrench head (100), the first jaw (110) including a first driving wall (114) disposed in a first plane;a second jaw (120) extending outwardly from the base portion (200) of the wrench head (100) such that the first jaw (110) and the second jaw (120) define a drive opening configured to receive the drive end of the fastener (W), the second jaw including a rear-end wall (127) disposed adjacent the base portion (200) of the wrench head (100) and a second driving wall (124), both the rear-end wall (127) and the second driving wall (124) being disposed in a second plane; andan auxiliary jaw (140) including a driving surface (143), the auxiliary jaw (140) being slidably received in the second jaw (120) such that the driving surface (143) of the auxiliary jaw (140) extends outwardly into the drive opening, wherein the auxiliary jaw (140) is slidably received in the second jaw (120) between the second driving wall (124) and the rear-end wall (127).
- The ratchetable open-ended wrench according to claim 9,
wherein the drive end of the fastener (W) is slidably receivable in the drive opening of the wrench head (100) such that the fastener (W) can be rotated in a first direction by the first driving wall (114) and the rear-end wall (127). - The ratchetable open-ended wrench according to claim 10, wherein the fastener is rotatable in the first direction by the first driving wall (114) in combination with the drive surface (143) of the auxiliary jaw (140) and the second driving wall (124) when the drive end of the fastener (W) is partially received within the drive opening of the wrench head (100) and rotatable in the first direction by the first driving wall (114) in combination with the rear-end wall (127) and the driving surface (143) of the auxiliary pawl (140) when the drive end of the fastener (W) is fully received within the drive opening of the wrench head (100).
- The ratchetable open-ended wrench according to claim 9,
wherein the first driving wall (114) and the rear-end wall (127) are substantially parallel and separated by a first width that is substantially equal to a second width that separates the at least one pair of opposed contact edges WS of the drive end of the fastener from each other. - The ratchetable open-ended wrench according to claim 9,
wherein the driving surface (143) of the auxiliary pawl (140) is disposed within the second plane in which the rear-end wall (127) and the second driving wall (124) lie when the auxiliary jaw (140) is in a first position in which it is fully extended into the drive opening (100). - The ratchetable open-ended wrench according to claim 9,
wherein the second jaw (120) further comprises a concavity (128) formed by a concave wall that extends from the rear-end wall (127) to the second driving wall (124) such that the auxiliary jaw (140) extends outwardly into the concavity (128). - The ratchetable open-ended wrench according to claim 9,
wherein the auxiliary jaw (140) is urged inwardly into the second jaw (120) when the wrench head (100) is rotated about the fastener in a second direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10153675.3A EP2255927B1 (en) | 2009-05-07 | 2010-02-16 | Ratchetable open-ended wrench |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09159662A EP2248631B1 (en) | 2009-05-07 | 2009-05-07 | Ratchetable open-ended wrench |
EP10153675.3A EP2255927B1 (en) | 2009-05-07 | 2010-02-16 | Ratchetable open-ended wrench |
Publications (3)
Publication Number | Publication Date |
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EP2255927A2 true EP2255927A2 (en) | 2010-12-01 |
EP2255927A3 EP2255927A3 (en) | 2012-03-28 |
EP2255927B1 EP2255927B1 (en) | 2015-08-05 |
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Family Applications (2)
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EP09159662A Active EP2248631B1 (en) | 2009-05-07 | 2009-05-07 | Ratchetable open-ended wrench |
EP10153675.3A Active EP2255927B1 (en) | 2009-05-07 | 2010-02-16 | Ratchetable open-ended wrench |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP09159662A Active EP2248631B1 (en) | 2009-05-07 | 2009-05-07 | Ratchetable open-ended wrench |
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EP (2) | EP2248631B1 (en) |
AT (1) | ATE523294T1 (en) |
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JP2012232401A (en) * | 2011-04-29 | 2012-11-29 | Kohi Ko | Open end wrench |
US8347764B2 (en) | 2008-06-10 | 2013-01-08 | Apex Tool (Hk) Limited Taiwan Branch | Ratchetable open-ended wrench |
DE102013101361B4 (en) * | 2012-08-07 | 2015-06-11 | Infar Industrial Co., Ltd. | Edge protection - Ratchet wrench |
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Publication number | Priority date | Publication date | Assignee | Title |
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TWI460054B (en) * | 2012-07-05 | 2014-11-11 | Infar Ind Co Ltd | Anti-abrasion quick opening wrench |
CN113300127B (en) * | 2021-05-27 | 2022-07-12 | 广东电网有限责任公司 | Grounding tool |
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DE10204805A1 (en) * | 2002-02-06 | 2003-08-14 | Markus Feldhaus | Set spanner with free return stroke has gap shaped to enable ratchet effect in reverse direction |
DE202005019936U1 (en) * | 2005-12-21 | 2006-02-16 | Chang, Hui-Ling, Taiping | One-side open-ended spanner for tightening nut, has movable jaw with bearing facet adjoining facet of fastening unit, such that movable and stationary jaws clamp and rotate fastening unit, and spring to loads movable jaw with spring tension |
-
2009
- 2009-05-07 EP EP09159662A patent/EP2248631B1/en active Active
- 2009-05-07 AT AT09159662T patent/ATE523294T1/en not_active IP Right Cessation
-
2010
- 2010-02-16 EP EP10153675.3A patent/EP2255927B1/en active Active
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US2879681A (en) | 1957-10-28 | 1959-03-31 | Howard C Blasdell | Slidable jaw-face, open-end wrench |
US3165015A (en) | 1963-01-26 | 1965-01-12 | John H Farley | Wrench |
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WO1996015879A1 (en) | 1994-11-21 | 1996-05-30 | Pradelski William M | Ratchetable open-ended wrench |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8347764B2 (en) | 2008-06-10 | 2013-01-08 | Apex Tool (Hk) Limited Taiwan Branch | Ratchetable open-ended wrench |
US8978524B2 (en) | 2008-06-10 | 2015-03-17 | Apex Took (HK) Limited Taiwan Branch | Ratchetable open-ended wrench |
JP2012232401A (en) * | 2011-04-29 | 2012-11-29 | Kohi Ko | Open end wrench |
DE102013101361B4 (en) * | 2012-08-07 | 2015-06-11 | Infar Industrial Co., Ltd. | Edge protection - Ratchet wrench |
Also Published As
Publication number | Publication date |
---|---|
EP2255927B1 (en) | 2015-08-05 |
EP2255927A3 (en) | 2012-03-28 |
EP2248631B1 (en) | 2011-09-07 |
ATE523294T1 (en) | 2011-09-15 |
EP2248631A1 (en) | 2010-11-10 |
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