EP2737977A1 - One-way torque tool - Google Patents
One-way torque tool Download PDFInfo
- Publication number
- EP2737977A1 EP2737977A1 EP12195169.3A EP12195169A EP2737977A1 EP 2737977 A1 EP2737977 A1 EP 2737977A1 EP 12195169 A EP12195169 A EP 12195169A EP 2737977 A1 EP2737977 A1 EP 2737977A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- head
- rotor
- angle
- pawls
- torque tool
- 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
Links
- 230000005540 biological transmission Effects 0.000 description 18
- 230000007935 neutral effect Effects 0.000 description 7
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
- B25B13/462—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis
- B25B13/465—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis a pawl engaging an internally toothed ring
Definitions
- US Patent No. 5074174 discloses a socket wrench including a body 1, a ratchet member 108 and a plurality of socket members 102, 103 and 104.
- the ratchet member 108 and the socket members 102, 103 and 104 are placed in the body 1.
- the ratchet member 108 includes two pawls 180 and 181 and a cam 182. By operating the cam 182, teeth of a selected one of the pawls 180 and 181 is engaged with teeth of the socket member 104.
- the upper ring 41 includes a rib 43 extending on a lower face 42 which is in contact with the head 21.
- the rib 43 includes two thin portions 44 and two thick portions 45.
- the thin portions 44 and the thick portions 45 are alternately arranged along the rib 43.
- One thick portion 45 (the "long thick portion 45) extends longer than the other thick portion 45 (the "short thick portion 45).
- An internal diameter of the thin portions 44 is larger than that of the thick portions 45.
- the long thick portion 45 includes two recesses 47 defined in an internal side. The recesses 47 are separated from each other by a peak 48 which does not extend beyond the long thick portion 45.
- the rotor 30 includes two cutouts 35, two pockets 56 and a bore 52 defined in the middle section 34.
- the cutouts 35 are defined in the periphery of the middle section 34 of the rotor 30.
- the shape of the cutouts 35 is in compliance with that of the pawls 60.
- Each of the cutouts 35 includes an inclined face 36, an arched face 37 and a flat side 38 extending between the inclined face 36 and the arched face 37.
- a center of the arched face 37 of the first cutout 35 is separated from that of the second cutout 35 by the angle ⁇ .
- Each of the pockets 56 is in communication with a corresponding one of the cutouts 35.
- An axis of each of the pockets 56 does not extend to the center of the arched face 37 of the corresponding one of the cutouts 35.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
- The present invention relates to a one-way torque tool and, more particularly, to a one-way torque tool that requires a small angle of neutral rotation before active rotation can be executed again.
- A conventional torque tool is often used to drive a nut or screw. For example, a wrench may be used to drive a nut or screw. A screwdriver may be used to drive a screw. An Allen key may be used to drive a screw.
- A one-way torque tool is often used to drive a nut or screw in a limited space. A one-way torque tool may be a one-way (or "ratchet") wrench or screwdriver. For example, a one-way wrench includes a handle extending from a hollow head, a rotor rotationally placed in the head, and a one-way driving unit or transmission arranged between the head and the rotor. A one-way screwdriver includes a handle, a rotor rotationally placed in the handle, and a one-way driving unit or transmission arranged between the handle and the rotor. The one-way transmission generally includes a pawl pivotally connected to the head or handle and a toothed wheel co-axially connected to the rotor. In operation, then rotor is engaged with a nut or screw via a socket for example, and the handle is rotated to and fro. The rotor is driven by the handle via the one-way transmission as the pawl is engaged with the toothed wheel when the handle is rotated in an active direction. The rotor is not driven by the handle via the one-way transmission as the pawl is disengaged from the toothed wheel when the handle is rotated in a neutral direction.
- As disclosed in
US Patent No. 6655238 , a ratchet tool includes ahead 30, anengaging ring 40, apawl 50 and aspring 34. Theengaging ring 40, thepawl 50 and thespring 34 are placed in thehead 30. Biased by thespring 34, teeth of thepawl 50 are engaged with teeth of theengaging ring 40. - As disclosed in
US Patent No. 4147076 , a reversing-ratchet wrench includes a lever 10 formed with a fulcrum end 12, apawl carrier 20 placed in the fulcrum end 12, a double pawl element 27 supported on thepawl carrier 20, and a ratchetdrive selector mechanism 30 connected to the double pawl element 27. The ratchetdrive selector mechanism 30 is used to bring teeth formed on a selected one of two ends of the double pawl element 27 with teeth formed on an internal side of the fulcrum end 12. Thus, the reversing-ratchet wrench is switched between a tightening mode and a loosening mode. A similar wrench can be found inUS Patent No. 4261233 . -
US Patent No. 5074174 discloses a socket wrench including a body 1, a ratchet member 108 and a plurality of socket members 102, 103 and 104. The ratchet member 108 and the socket members 102, 103 and 104 are placed in the body 1. The ratchet member 108 includes two pawls 180 and 181 and a cam 182. By operating the cam 182, teeth of a selected one of the pawls 180 and 181 is engaged with teeth of the socket member 104. - It should be noted that after the handle is rotated in the active direction to drive the nut or screw, the handle must be rotated in the neutral direction for the angle of at least one tooth to return the pawl into engagement with the toothed wheel before the handle can be rotated in the active direction to drive the nut or screw again. For example, if the toothed wheel includes twenty-four teeth, i.e., the angle of each tooth is 15°, the handle must be rotated in the neutral direction for at least 15° before the handle can be rotated in the active direction to drive the nut or screw again. There is however not enough space for the rotation of the handle in the neutral direction for the angle of one tooth.
- The number of the teeth can be increased to reduce the angle of a tooth. As disclosed in
US Patent No. 6666111 for example, the number of the teeth is 90 to 180 so that the angle of one tooth is 4° to 2°. As the number of teeth is large, the size of the teeth is small, and the strength of the teeth is low. The teeth could easily be worn away. - Furthermore, for each of the conventional torque tools, the number of the teeth is constant, i.e., the angle of one tooth is constant. A user may not be able to exert large torque if he or she chooses to use a toque tool with a large number of teeth such as disclosed in
US Patent No. 6666111 in limited space. Hence, there is an unsatisfied need for a torque tool to allow a user to exert large torque in limited space. - The present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art.
- It is the primary objective of the present invention to provide a torque tool to allow a user to exert large torque in limited space.
- To achieve the foregoing objective, the one-way torque tool includes a head, a rotor placed in the head, a number of ratchets formed on the head, two pawls pivotally connected to the rotor and detachably engaged with the ratchets. The ratchets are separated from one another by a first angle α identical to 360 degrees divided by the number of the ratchets. The pawls are separated from each other by a second angle β identical to a multiple of the first angle α plus a third angle θ that is smaller than the first angle α.
- Other objectives, advantages and features of the present invention will be apparent from the following description referring to the attached drawings.
- The present invention will be described via detailed illustration of two embodiments referring to the drawings wherein:
-
FIG. 1 is a perspective view of a one-way torque tool according to the first embodiment of the present invention; -
FIG. 2 is a cross-sectional view of the one-way torque tool taken along a line A-A shown inFIG. 1 ; -
FIG. 3 is a top view of a one-way transmission used in the one-way torque tool shown inFIG. 1 ; -
FIG. 4 is a perspective view of an upper ring used in the one-way transmission shown inFIG. 3 ; -
FIG. 5 is a perspective view of a pawl used in the one-way transmission shown inFIG. 3 ; -
FIG. 6 is a top view of a rotor used in the one-way transmission shown inFIG. 3 ; -
FIG. 7 is a cross-sectional view of the one-way torque tool taken along a line B-B shown inFIG. 2 ; -
FIG. 8 is a cross-sectional view of the one-way torque tool in another position than shown inFIG. 7 ; and -
FIG. 9 is a top view of a one-way transmission according to the second embodiment of the present invention. - Referring to
FIGS. 1 through 8 , there is shown a one-way torque tool in the form of awrench 20 according to a first embodiment of the present invention. Referring toFIGS. 1 and2 , thewrench 20 includes ahead 21, arotor 30 rotationally placed in thehead 21, aswitch 40 and a one-way transmission 50. In short, the one-way transmission 50 is arranged between thehead 21 and therotor 30. Thehead 21 can be rotated in an active direction to drive therotor 30 via the one-way transmission 50. Thehead 21 can be rotated in a neutral direction opposite to the active direction without driving therotor 30 via the one-way transmission 50. Theswitch 40 is operable to change a minimum angle of the rotation of thehead 21 in the neutral direction before thehead 21 can be rotated in the active direction to drive therotor 30 via the one-way transmission 50 again. - The
head 21 includes anupper space 28 axially defined therein and alower space 29 axially defined therein. Theupper space 28 is made with a diameter larger than that of thelower space 29. - The
rotor 30 includes anupper section 32, alower section 33 and amiddle section 34 extending between theupper section 32 and thelower section 33. Theupper section 32 is made with a diameter substantially identical to that of thelower section 33. The diameter of theupper section 32 is smaller than that of themiddle section 34. Agroove 31 is defined in the periphery of each of the upper andlower sections - Referring to
FIG. 3 , the one-way transmission 50 preferably includes thirty-sixratchets 51 for engagement with twopawls 60 for example. The one-way transmission 50 may include another proper number ofratchets 51 and another proper number ofpawls 60. Theratchets 51 are formed on the wall of thelower space 29 of thehead 21. The angle α of each of theratchets 51 is 10°. Thepawls 60 are pivotally connected to themiddle section 34 of therotor 30. Thepawls 60 are separated from each by an angle β of 85° for example. The angle between thepawls 60 is derived from the angle of each of theratchets 51 according to the following notion:
wherein n is an integer smaller than half of the number of theratchets 51, and θ is an angle smaller than α. In the preferred embodiment, the number of theratchets 51 is 36, n is 8, and θ is 5°. - Referring to
FIG. 4 , theupper ring 41 includes arib 43 extending on alower face 42 which is in contact with thehead 21. Therib 43 includes twothin portions 44 and twothick portions 45. Thethin portions 44 and thethick portions 45 are alternately arranged along therib 43. One thick portion 45 (the "long thick portion 45) extends longer than the other thick portion 45 (the "short thick portion 45). An internal diameter of thethin portions 44 is larger than that of thethick portions 45. There is atransient portion 46 formed between the shortthick portion 45 and the adjacentthin portion 44. The longthick portion 45 includes tworecesses 47 defined in an internal side. Therecesses 47 are separated from each other by apeak 48 which does not extend beyond the longthick portion 45. - Referring to
FIG. 5 , description will be given to only one of thepawls 60 since thepawls 60 are identical. Thepawl 60 includes anarched face 61, aninclined face 62, along side 63, ashort side 64, apivot 65 and atip 66. Thearched face 61 is placed opposite to theinclined face 62. Thelong side 63 is placed opposite to theshort side 64. Thepivot 65 is placed near thearched face 61. Thetip 66 is formed by and between theinclined face 62 and thelong side 63. - Referring to
FIG. 6 , therotor 30 includes twocutouts 35, twopockets 56 and abore 52 defined in themiddle section 34. Thecutouts 35 are defined in the periphery of themiddle section 34 of therotor 30. The shape of thecutouts 35 is in compliance with that of thepawls 60. Each of thecutouts 35 includes aninclined face 36, anarched face 37 and aflat side 38 extending between theinclined face 36 and thearched face 37. A center of thearched face 37 of thefirst cutout 35 is separated from that of thesecond cutout 35 by the angle β. Each of thepockets 56 is in communication with a corresponding one of thecutouts 35. An axis of each of thepockets 56 does not extend to the center of thearched face 37 of the corresponding one of thecutouts 35. - Referring to
FIG. 7 , aspring 18 is placed in each of thepockets 56. Thepawls 60 are placed in thecutouts 35, respectively. Thepawls 60 are biased by thesprings 18. Anotherspring 53 and adetent 54 are subsequently placed in thebore 52. Thedetent 54 is preferably a ball. Thespring 53 is used to bias thedetent 54 into a selective one of therecesses 47. Once thedetent 54 is placed in the first orsecond recess 47, theupper ring 41 is rotatable together with therotor 30. - Referring to
FIGS. 2 and7 , asquare axle 24 is placed in a square aperture axially defined in therotor 30. A spring-biaseddetent 25 is placed on a lower section of thesquare axle 24 that is placed outside therotor 30. The lower section of thesquare axle 24 can be inserted in a square cavity defined in a socket that in turn can be engaged with a nut or a head of a screw. The spring-biaseddetent 25 is used to keep the lower section of theaxle 24 in the square cavity of the socket. Themiddle section 34 of therotor 30 is placed in thehead 21 while theupper section 32 and thelower section 33 are placed outside thehead 21. - The
upper ring 41 is placed on an upper edge of thehead 21. Therib 43 is placed in theupper space 28 so that theupper ring 41 can smoothly be rotated on thehead 21. Theupper ring 41 is kept on thehead 21 by aclip 23 that is placed in thegroove 31 of theupper section 32 of therotor 30. - A
lower ring 26 is placed against a lower edge of thehead 21. Thelower ring 26 is kept in position by anotherclip 23 placed in thegroove 31 of thelower section 33 of therotor 30. - Referring to
FIG. 7 , theupper ring 41 is placed in a first angle relative to therotor 30 as thespring 53 biases thedetent 54 in thefirst recess 47. Thefirst pawl 60 can be pivoted relative to therotor 30. That is, thetip 66 can be moved out of thefirst cutout 35 while thepivot 65 is rotationally placed in thefirst cutout 35. Thearched face 61 of thefirst pawl 60 is in contact with thearched face 37 of thefirst cutout 35. Now, the shortthick portion 45 of theupper ring 41 keeps thesecond pawl 60 in thesecond cutout 35 and prevents thesecond pawl 60 from pivoting relative to therotor 30. - When the
head 21 is pivoted clockwise, one of theratchets 51 is engaged with thetip 66 of thefirst pawl 60 so that thehead 21 rotates therotor 30. As thehead 21 is pivoted counterclockwise, theratchets 51 can be disengaged from thefirst pawl 60 so that thehead 21 does not rotate therotor 30. After thehead 21 is pivoted counterclockwise for 10°, thehead 21 can be pivoted clockwise again to engage a next one of theratchets 51 with thetip 66 of thefirst pawl 60 so that thehead 21 rotates therotor 30. - Referring to
FIG. 8 , theupper ring 41 is rotated to a second angle on therotor 30 so that thespring 53 biases thedetent 54 in thesecond recess 47. The shortthick portion 45 of theupper ring 41 is moved away from thesecond pawl 60 to allow thesecond pawl 60 to pivot relative to therotor 30. Thefirst pawl 60 can still be pivoted relative to therotor 30. - When the
head 21 is pivoted clockwise, one of theratchets 51 is engaged with thetip 66 of thefirst pawl 60 so that thehead 21 rotates therotor 30. As thehead 21 is pivoted counterclockwise, theratchets 51 can be disengaged from thefirst pawl 60 so that thehead 21 does not rotate therotor 30. After thehead 21 is pivoted counterclockwise for 5°, thehead 21 can be pivoted clockwise again to engage one of theratchets 51 with thetip 66 of thesecond pawl 60 so that thehead 21 rotates therotor 30. Then, thehead 21 is pivoted counterclockwise so that thehead 21 does not rotate therotor 30. After thehead 21 is pivoted counterclockwise for another 5°, thehead 21 can be pivoted clockwise again to engage one of theratchets 51 with thetip 66 of thefirst pawl 60 so that thehead 21 rotates therotor 30. - Referring to
FIG. 9 , there is shown a one-way transmission according to a second embodiment of the present invention. The second embodiment is like the first embodiment except including twenty-fourratchets 51 and threepawls 60. The angle α of each of theratchets 51 is 15°. Thefirst pawl 60 is separated from thesecond pawl 60 by an angle β1 of 50° for example. Thesecond pawl 60 is separated from thethird pawl 60 by an angle β2 of 50° for example. The angles β1 and β2 are derived from the angle of each of theratchets 51 according to the following notions:
wherein n1 and n2 are 3, and θ1 and θ2 are 5°. It should however be noted that n1 could be different from n2, and θ1 could be different from θ2. - The present invention has been described via the detailed illustration of the 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.
Claims (17)
- A one-way torque tool including:a head 21;a rotor 30 placed in the head 21;a number of ratchets 51 formed on one of the head 21 and the rotor 30, wherein the ratchets 51 are separated from one another by a first angle α identical to 360 degrees divided by the number of the ratchets 51;two pawls 60 pivotally connected to the other one of the head 21 and the rotor 30 and detachably engaged with the ratchets 51, wherein the pawls 60 are separated from each other by a second angle β identical to a multiple of the first angle α plus a third angle θ that is smaller than the first angle α.
- The one-way torque tool according to claim 1, wherein the ratchets 51 are formed on an internal side of the head 21, wherein the first and second pawls 60 are pivotally connected to an external side of the rotor 30.
- The one-way torque tool according to claim 1, including another pawl 60 separated from one of the pawls 60 by a fourth angle β identical to a multiple of the first angle α plus a fifth angle θ that is smaller than the first angle α.
- The one-way torque tool according to claim 3, wherein the fifth angle is identical to the third angle or wherein the fifth angle is different from the third angle.
- The one-way torque tool according to claim 1, further including a switch 40 operable for keeping one of the pawls 60 from the ratchets 51.
- The one-way torque tool according to claim 5, wherein the switch 40 includes a ring 41 switchable relative to one of the head 21 and the rotor 30 between a first position where the ring 41 keeps one of the pawls 60 from the ratchets 51 and a second position where the ring 41 does not keep any of the pawls 60 from the ratchets 51.
- The one-way torque tool according to claim 6, wherein the ring 41 includes a rib 43 placed in the head 21.
- The one-way torque tool according to claim 7, wherein the rib 43 includes a thick portion 45 for pressing one of the pawls 60.
- The one-way torque tool according to claim 6, wherein switch 40 further includes a detent 54 for abutment against the rib 43 to keep the ring 41 in one of the first and second positions relative to one of the head 21 and the rotor 30.
- The one-way torque tool according to claim 9, wherein the rib 43 includes first and second recesses 47 defined therein, wherein the detent 54 is placed in the first recess 47 when the ring 41 in the first position relative to one of the head 21 and the rotor 30, wherein the detent 54 is placed in the second recess 47 when the ring 41 in the second position relative to one of the head 21 and the rotor 30.
- The one-way torque tool according to claim 9, wherein the switch 40 further includes a spring 53 for biasing the detent 54.
- The one-way torque tool according to claim 11, wherein one of the head 21 and the rotor 30 includes a bore 52 for containing the spring 53.
- The one-way torque tool according to claim 1, wherein one of head 21 and the rotor 30 includes two cutouts 35 each for containing at least a portion of a corresponding one of the pawls 60.
- The one-way torque tool according to claim 1 or 13, further including two springs 18 for biasing the pawls 60.
- The one-way torque tool according to claim 14, wherein one of head 21 and the rotor 30 includes two pockets 56 for containing the springs 18.
- The one-way torque tool according to claim 13, wherein each of the pawls 60 includes a pivot 65 placed in the corresponding one of the pawls 60 and a tip 66 movable into engagement with the ratchets 51 from the corresponding one of the pawls 60.
- The one-way torque tool according to claim 16, wherein each of the cutouts 35 includes an arched face 37, an inclined face 36 and a flat face 38 extending between the arched face 37 and the inclined face 36, wherein each of the pawls 60 includes an arched face 61 formed near the pivot 65 and in contact with the arched face 37 of the corresponding one of the pawls 60.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI201230478T SI2737977T1 (en) | 2012-11-30 | 2012-11-30 | One-Way Torque Tool |
EP12195169.3A EP2737977B1 (en) | 2012-11-30 | 2012-11-30 | One-Way Torque Tool |
PL12195169T PL2737977T3 (en) | 2012-11-30 | 2012-11-30 | One-Way Torque Tool |
ES12195169.3T ES2565854T3 (en) | 2012-11-30 | 2012-11-30 | Unidirectional Twist Tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12195169.3A EP2737977B1 (en) | 2012-11-30 | 2012-11-30 | One-Way Torque Tool |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2737977A1 true EP2737977A1 (en) | 2014-06-04 |
EP2737977B1 EP2737977B1 (en) | 2016-01-06 |
Family
ID=47429567
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12195169.3A Active EP2737977B1 (en) | 2012-11-30 | 2012-11-30 | One-Way Torque Tool |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2737977B1 (en) |
ES (1) | ES2565854T3 (en) |
PL (1) | PL2737977T3 (en) |
SI (1) | SI2737977T1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI505918B (en) * | 2013-11-22 | 2015-11-01 | Torque tool with an adjustable angle of neutral mode | |
TWI505916B (en) * | 2013-11-22 | 2015-11-01 | Multi-mode wrench | |
EP3002083A1 (en) * | 2014-10-03 | 2016-04-06 | Stanley Chiro International Ltd. | Ratchet socket wrench |
EP3056313A1 (en) * | 2015-02-10 | 2016-08-17 | Yi-Min Wu | Multi-mode wrench |
CN108032246A (en) * | 2017-12-13 | 2018-05-15 | 温州大学 | A kind of recordable rotating cycle does not unload spanner |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2112693A (en) * | 1937-06-16 | 1938-03-29 | Independent Pneumatic Tool Co | Portable hammer wrench |
DE2365124A1 (en) * | 1973-12-29 | 1975-07-10 | Elora Werkzeugfabrik Erich Rau | Ratchet for socket spanner inserts - has spanner nut with outward-loaded latch pawls engaging in head inner toothing |
US4147076A (en) | 1977-10-31 | 1979-04-03 | The Wright Tool And Forge Company | Reversing-ratchet socket wrench |
US4261233A (en) | 1979-02-05 | 1981-04-14 | Thorsen Tool Company | Ratchet wrench of the socket drive type |
DE3818470A1 (en) * | 1988-05-31 | 1989-03-02 | Mueller Hans Joachim | Spanner fitted with a ratchet, for providing a free return stroke of the handle |
US5074174A (en) | 1989-09-02 | 1991-12-24 | Dae Sam Co., Ltd. | Socket wrench |
US6655238B1 (en) | 2002-11-07 | 2003-12-02 | Chih-Ching Hsien | Reinforcement teeth structure for ratchet |
US6666111B1 (en) | 2002-12-23 | 2003-12-23 | Chih-Ching Hsien | Wrench teeth arrangement for ratchet tools |
US20040089108A1 (en) * | 2002-11-11 | 2004-05-13 | Chuck Chang | Wrench having a locking device with a smaller driving angle |
US20100162857A1 (en) * | 2008-12-27 | 2010-07-01 | Chuck Chang | Wrench |
-
2012
- 2012-11-30 SI SI201230478T patent/SI2737977T1/en unknown
- 2012-11-30 PL PL12195169T patent/PL2737977T3/en unknown
- 2012-11-30 EP EP12195169.3A patent/EP2737977B1/en active Active
- 2012-11-30 ES ES12195169.3T patent/ES2565854T3/en active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2112693A (en) * | 1937-06-16 | 1938-03-29 | Independent Pneumatic Tool Co | Portable hammer wrench |
DE2365124A1 (en) * | 1973-12-29 | 1975-07-10 | Elora Werkzeugfabrik Erich Rau | Ratchet for socket spanner inserts - has spanner nut with outward-loaded latch pawls engaging in head inner toothing |
US4147076A (en) | 1977-10-31 | 1979-04-03 | The Wright Tool And Forge Company | Reversing-ratchet socket wrench |
US4261233A (en) | 1979-02-05 | 1981-04-14 | Thorsen Tool Company | Ratchet wrench of the socket drive type |
DE3818470A1 (en) * | 1988-05-31 | 1989-03-02 | Mueller Hans Joachim | Spanner fitted with a ratchet, for providing a free return stroke of the handle |
US5074174A (en) | 1989-09-02 | 1991-12-24 | Dae Sam Co., Ltd. | Socket wrench |
US6655238B1 (en) | 2002-11-07 | 2003-12-02 | Chih-Ching Hsien | Reinforcement teeth structure for ratchet |
US20040089108A1 (en) * | 2002-11-11 | 2004-05-13 | Chuck Chang | Wrench having a locking device with a smaller driving angle |
US6666111B1 (en) | 2002-12-23 | 2003-12-23 | Chih-Ching Hsien | Wrench teeth arrangement for ratchet tools |
US20100162857A1 (en) * | 2008-12-27 | 2010-07-01 | Chuck Chang | Wrench |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI505918B (en) * | 2013-11-22 | 2015-11-01 | Torque tool with an adjustable angle of neutral mode | |
TWI505916B (en) * | 2013-11-22 | 2015-11-01 | Multi-mode wrench | |
EP3002083A1 (en) * | 2014-10-03 | 2016-04-06 | Stanley Chiro International Ltd. | Ratchet socket wrench |
EP3056313A1 (en) * | 2015-02-10 | 2016-08-17 | Yi-Min Wu | Multi-mode wrench |
CN108032246A (en) * | 2017-12-13 | 2018-05-15 | 温州大学 | A kind of recordable rotating cycle does not unload spanner |
Also Published As
Publication number | Publication date |
---|---|
EP2737977B1 (en) | 2016-01-06 |
ES2565854T3 (en) | 2016-04-07 |
PL2737977T3 (en) | 2016-06-30 |
SI2737977T1 (en) | 2016-04-29 |
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