EP0580680B1 - Adjustable spanners - Google Patents
Adjustable spanners Download PDFInfo
- Publication number
- EP0580680B1 EP0580680B1 EP92908444A EP92908444A EP0580680B1 EP 0580680 B1 EP0580680 B1 EP 0580680B1 EP 92908444 A EP92908444 A EP 92908444A EP 92908444 A EP92908444 A EP 92908444A EP 0580680 B1 EP0580680 B1 EP 0580680B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spanner
- locking
- serrations
- pin
- movable jaw
- 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.)
- Expired - Lifetime
Links
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
- B25B13/10—Spanners; Wrenches with adjustable jaws
- B25B13/12—Spanners; Wrenches with adjustable jaws the jaws being slidable
- B25B13/20—Arrangements for locking the jaws
- B25B13/24—Arrangements for locking the jaws by cam, wedge, or friction means
Definitions
- This invention relates to an adjustable spanner.
- Adjustable spanners were well known to have one jaw of the spanner fixed to a handle, and a second jaw of the spanner adjustable relative to the first by means of a screw threaded device embodied in the handle.
- the present invention relates to an justable spanner having one fixed jaw and one movable jaw, the fixed jaw being mounted on or formed integrally with the body or handle of the spanner, and the movable jaw being arranged to slide in the body or handle of the spanner relative to the fixed jaw; in which the movable jaw is provided with a first set of serrations, and a locking member provided with a second set of serrations is movably mounted in the body of the spanner to move between a locking position in which the second serrations engage the first serrations to lock the movable jaw in an operative position, and a release position in which the second set of serrations are clear of the first set of serrations to allow adjusting movement of the movable jaw, and wherein releasable locking means is provided for locking the locking member positively in said locking position, cf. US-A-4 106 372.
- the spanner is characteristic in that said locking means comprises a pin which is slidably mounted in the body or handle for axial movement between a locking and a release position, said pin having a cam surface adapted to engage said locking member and urge it towards the movable jaw on movement of the pin between its locking and release positions.
- the locking member is slidably mounted in said body or handle to move in a direction transverse to the direction of movement of the movable jaw.
- the locking member may be provided with a projection arranged to engage said cam surface.
- the pin may be provided with a recess arranged to receive said projection when said locking member and said pin are in their release positions.
- the pin may be of circular cross-section, in which case the cam surface is a tapered portion on the surface of the pin.
- the pin may be of rectangular cross-section, in which case the cam surface is an inclined portion on one side thereof.
- said pin is provided with a stop to prevent overtightening of the locking means.
- the locking member is resiliently biased away from the movable jaw by means of a spring.
- the first and second sets of serrations have a pitch distance corresponding to the increments in the size of the nuts to be turned by the spanner.
- a scale arrangement is provided between the fixed and movable jaws so that the setting of the spanner may be indicated.
- the spanner shown in Figures 1, 2 and 3 of the accompanying drawings comprises a handle 10 having a fixed spanner jaw 11 formed integrally therewith, and a movable spanner jaw 12 which is freely slidable in the body of the spanner which is formed integrally with the handle 10.
- the movable jaw 12 has a "keyhole" shaped projection 13 which moves in a correspondingly shaped slot 14 formed in the body of the spanner adjacent to fixed jaw 11, in conventional manner per se .
- a rear surface of the movable jaw 12 is provided with a first set of serrations 15 which can be engaged by a corresponding second set of serrations 16 which are formed on a locking member 17.
- the locking member 17 is slidably mounted in a suitable aperture 18, which is formed in the body of the spanner, so as to be movable in a direction transverse to the direction of movement of the movable jaw 12, between a locking position with the first set of serrations in engagement with the second set, and a release position with the first set of serrations clear of the second set.
- the movable jaw 12 is securely locked in a position to fit a chosen nut size, while with the locking member in such release position, the movable jaw 12 may be freely adjusted to a chosen nut size.
- the serrations 15 and 16 which are naturally of matching pitch, are preferably chosen in pitch to correspond either to inch size or metric size increments of nut sizes upon which the spanner is to be used.
- the movable jaw 12 may also be provided with an engraved pointer 19 which moves against a scale 20 provided on the fixed jaw or body of the spanner (see Figure 2), so that the movable jaw may be set to a given nut size for use.
- Locking means indicated generally at 21 is provided in the body of the spanner to releasably engage and retain the locking member 17 in the locking position with its serrations 16 in engagement with the serrations 15 of the movable jaw 12 of the spanner.
- the locking means 21 comprises a pin 22 which is slidably mounted in the body of the spanner 10 for movement, in a direction transverse to that of the locking member 17, and generally parallel with that of the movable jaw 12.
- the pin 22 is provided with a cam surface in the form of a tapered portion 23 which is arranged to engage a projection 24 formed on the back of the locking member 17.
- a necked portion 27 is formed on the pin 22 immediately below the tapered portion 23 to provide a recess so that when the tapered pin is moved upwards, as seen in the drawings, the locking member 17 is released and the projection 24 may be received in the recess, allowing free movement of the movable jaw 12 with the serrations out of engagement.
- the locking member 17 may be assembled in the body of the spanner through a suitable aperture in a side face which is subsequently covered by a cover plate 28, as shown in Figure 2.
- a stop screw 29 may be provided in the body of the spanner to engage in a corresponding slot 30 in the movable jaw 12, to prevent the movable jaw from falling completely out of the spanner when the locking member 17 is released.
- the engagement of the stop screw 29 in the slot 30, which occurs at wide or large settings of the spanner, also helps to transmit torque forces from the handle to the movable jaw, thus promoting the rigidity of the spanner in use at large settings.
- the embodiment provides an adjustable spanner which can be firmly locked in a chosen adjusted position to accommodate a given nut size, by the simple expedient of moving the pin 22 into a locking position, with a suitable tap from a hammer if necessary. Further, on release of the pin 22, with a suitable tap from a hammer if necessary on the bottom end, the adjustable jaw is released and can be easily adjusted to a chosen size. Once the movable jaw is locked by means of the pin 22 and locking member 17, the adjustable spanner behaves as if it was a solid spanner and thus alleviates the disadvantages of previous adjustable spanners as discussed above.
- Figures 4, 5 and 6 show a further spanner embodying the invention which is generally similar to that of Figures 1, 2 and 3; and where parts have a generally common design or purpose to those of Figures 1, 2 and 3, they have been given the same reference numbers.
- the pin 22 is of rectangular cross-section and slides in a corresponding cross-section slot in the body of the spanner.
- the tapered portion 23 of the previous embodiment is replaced by an inclined cam surface 40, while the recessed or necked part 27 of the previous embodiment is replaced by a recess 41.
- a compression coil spring 42 is provided to be active between a shoulder formed in the body of the spanner and a pin 43 provided in the locking member 17 adjacent the projection 24, thus to bias the locking member 17 into its release position.
- the present invention provides an adjustable spanner which can be firmly locked in position to accommodate a given nut size, while providing for the simple and convenient adjustment of the spanner to suit various nut sizes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Valve Device For Special Equipments (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Dental Prosthetics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Paper (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
- This invention relates to an adjustable spanner.
- Adjustable spanners were well known to have one jaw of the spanner fixed to a handle, and a second jaw of the spanner adjustable relative to the first by means of a screw threaded device embodied in the handle.
- The adjustment of such spanners is a time consuming operation, and the inevitable amount of slack or backlash between the screw mechanism and the movable spanner jaw, means that they rarely make a positive engagement on the faces of a hexagonal nut in the fashion of a fixed spanner.
- It is an object of the present invention to provide an adjustable spanner which alleviates these disadvantages.
- Accordingly, the present invention relates to an justable spanner having one fixed jaw and one movable jaw, the fixed jaw being mounted on or formed integrally with the body or handle of the spanner, and the movable jaw being arranged to slide in the body or handle of the spanner relative to the fixed jaw; in which the movable jaw is provided with a first set of serrations, and a locking member provided with a second set of serrations is movably mounted in the body of the spanner to move between a locking position in which the second serrations engage the first serrations to lock the movable jaw in an operative position, and a release position in which the second set of serrations are clear of the first set of serrations to allow adjusting movement of the movable jaw, and wherein releasable locking means is provided for locking the locking member positively in said locking position, cf. US-A-4 106 372.
- According to the present invention the spanner is characteristic in that said locking means comprises a pin which is slidably mounted in the body or handle for axial movement between a locking and a release position, said pin having a cam surface adapted to engage said locking member and urge it towards the movable jaw on movement of the pin between its locking and release positions.
- Preferably the locking member is slidably mounted in said body or handle to move in a direction transverse to the direction of movement of the movable jaw.
- The locking member may be provided with a projection arranged to engage said cam surface.
- The pin may be provided with a recess arranged to receive said projection when said locking member and said pin are in their release positions.
- The pin may be of circular cross-section, in which case the cam surface is a tapered portion on the surface of the pin.
- The pin may be of rectangular cross-section, in which case the cam surface is an inclined portion on one side thereof.
- Preferably said pin is provided with a stop to prevent overtightening of the locking means.
- Preferably the locking member is resiliently biased away from the movable jaw by means of a spring.
- Preferably the first and second sets of serrations have a pitch distance corresponding to the increments in the size of the nuts to be turned by the spanner.
- Preferably a scale arrangement is provided between the fixed and movable jaws so that the setting of the spanner may be indicated.
- In order to promote a fuller understanding of the above and other aspects of the present invention, an embodiment will now be described, by way of example only, with reference to the accompanying drawings, in which;
- Figure 1 shows a side view in part cross-section of a spanner embodying the invention,
- Figure 2 shows an external view of the spanner of Figure 1,
- Figure 3 shows a top view of the spanner of Figure 1,
- Figure 4 shows a view similar to Figure 1 of a further spanner embodying the invention,
- Figure 5 shows a top view of the spanner of Figure 4, and
- Figure 6 shows a part cross-section on the line
- The spanner shown in Figures 1, 2 and 3 of the accompanying drawings, comprises a
handle 10 having afixed spanner jaw 11 formed integrally therewith, and amovable spanner jaw 12 which is freely slidable in the body of the spanner which is formed integrally with thehandle 10. Themovable jaw 12 has a "keyhole"shaped projection 13 which moves in a correspondinglyshaped slot 14 formed in the body of the spanner adjacent to fixedjaw 11, in conventional manner per se. - A rear surface of the
movable jaw 12 is provided with a first set ofserrations 15 which can be engaged by a corresponding second set ofserrations 16 which are formed on alocking member 17. Thelocking member 17 is slidably mounted in asuitable aperture 18, which is formed in the body of the spanner, so as to be movable in a direction transverse to the direction of movement of themovable jaw 12, between a locking position with the first set of serrations in engagement with the second set, and a release position with the first set of serrations clear of the second set. It can be seen that with the locking member in such locking position, themovable jaw 12 is securely locked in a position to fit a chosen nut size, while with the locking member in such release position, themovable jaw 12 may be freely adjusted to a chosen nut size. - The
serrations movable jaw 12 may also be provided with an engravedpointer 19 which moves against ascale 20 provided on the fixed jaw or body of the spanner (see Figure 2), so that the movable jaw may be set to a given nut size for use. - Locking means indicated generally at 21 is provided in the body of the spanner to releasably engage and retain the
locking member 17 in the locking position with itsserrations 16 in engagement with theserrations 15 of themovable jaw 12 of the spanner. In this embodiment the locking means 21 comprises apin 22 which is slidably mounted in the body of thespanner 10 for movement, in a direction transverse to that of thelocking member 17, and generally parallel with that of themovable jaw 12. Thepin 22 is provided with a cam surface in the form of atapered portion 23 which is arranged to engage aprojection 24 formed on the back of thelocking member 17. - Thus it can be seen that downward movement, as seen in the drawings, of the
pin 22, between a release position and a locking position, will cause thelocking member 17 to move into its locking position in engagement with themovable jaw 12 and lock it in that locking position. Thetaper 23 can be made "self-locking" so that moderate force on the top of thepin 22 will achieve a firm locking of themovable jaw 12, which may be enhanced by a light tap in thetop pin 22. Ashoulder 25 is provided around the top of thepin 22 arranged to engage ashoulder 26 formed in the body of the spanner to prevent thepin 22 moving into the body of the spanner beyond the distance necessary for secure locking. A necked portion 27 is formed on thepin 22 immediately below thetapered portion 23 to provide a recess so that when the tapered pin is moved upwards, as seen in the drawings, thelocking member 17 is released and theprojection 24 may be received in the recess, allowing free movement of themovable jaw 12 with the serrations out of engagement. - The
locking member 17 may be assembled in the body of the spanner through a suitable aperture in a side face which is subsequently covered by acover plate 28, as shown in Figure 2. - A
stop screw 29 may be provided in the body of the spanner to engage in acorresponding slot 30 in themovable jaw 12, to prevent the movable jaw from falling completely out of the spanner when thelocking member 17 is released. The engagement of thestop screw 29 in theslot 30, which occurs at wide or large settings of the spanner, also helps to transmit torque forces from the handle to the movable jaw, thus promoting the rigidity of the spanner in use at large settings. - Thus it can be seen that the embodiment provides an adjustable spanner which can be firmly locked in a chosen adjusted position to accommodate a given nut size, by the simple expedient of moving the
pin 22 into a locking position, with a suitable tap from a hammer if necessary. Further, on release of thepin 22, with a suitable tap from a hammer if necessary on the bottom end, the adjustable jaw is released and can be easily adjusted to a chosen size.
Once the movable jaw is locked by means of thepin 22 andlocking member 17, the adjustable spanner behaves as if it was a solid spanner and thus alleviates the disadvantages of previous adjustable spanners as discussed above. - Figures 4, 5 and 6 show a further spanner embodying the invention which is generally similar to that of Figures 1, 2 and 3; and where parts have a generally common design or purpose to those of Figures 1, 2 and 3, they have been given the same reference numbers.
- In this arrangement, the
pin 22 is of rectangular cross-section and slides in a corresponding cross-section slot in the body of the spanner. Thetapered portion 23 of the previous embodiment is replaced by an inclined cam surface 40, while the recessed or necked part 27 of the previous embodiment is replaced by arecess 41. - In this embodiment a
compression coil spring 42 is provided to be active between a shoulder formed in the body of the spanner and a pin 43 provided in thelocking member 17 adjacent theprojection 24, thus to bias thelocking member 17 into its release position. - In other respects the embodiment of Figures 4, 5 and 6 operates in an exactly similar fashion to that of Figures 1, 2 and 3.
- Thus it can be seen that the present invention provides an adjustable spanner which can be firmly locked in position to accommodate a given nut size, while providing for the simple and convenient adjustment of the spanner to suit various nut sizes.
Claims (10)
- An adjustable spanner having one fixed jaw (11) and one movable jaw (12), the fixed jaw being mounted on or formed integrally with the body or handle (10) of the spanner, and the movable jaw being arranged to slide in the body or handle of the spanner relative to the fixed jaw; in which the movable jaw (12) is provided with a first set of serrations (15) and a locking member (17) provided with a second set of serrations (16) is movably mounted in the body of the spanner to move between a locking position in which said second set of serrations engage with said first set of serrations to lock the movable jaw (12) in an operative position, and a release position in which the second set of serrations are clear of said first set of serrations to allow adjusting movement of the movable jaw; wherein releasable locking means (21) is provided for locking the locking member (17) positively in said locking position, characterized in that said locking means (21) comprises a pin (22) which is slideably mounted in said body or handle for axial movement between a locking and a release position, said pin having a cam surface (23,40) adapted to engage said locking member (17) and urge it towards the movable jaw (12) on movement of the pin between its locking and release positions.
- An adjustable spanner as claimed in Claim 1, wherein said locking member (17) is slidably mounted in said body or handle to move in a direction transverse to the direction of movement of the movable jaw (12).
- An adjustable spanner as claimed in Claim 1 or 2, wherein said locking member (17) is provided with a projection (24) arranged to engage said cam surface (23,40).
- An adjustable spanner as claimed in Claim 3, wherein said pin is provided with a recess (27,41) arranged to receive said projection (24) when said locking member (17) and said pin (22,40) are in their release positions.
- An adjustable spanner as claimed in any preceding claim, wherein said pin (22) is of circular cross-section and said cam surface is a tapered portion (23) of the surface of the pin.
- An adjustable spanner as claimed in any one of Claims 1 to 4, wherein said pin (40) is of rectangular cross-section and said cam surface is an inclined portion (40) on one side thereof.
- An adjustable spanner as claimed in any preceding claim, wherein said pin (22,40) is provided with a stop (25) to prevent over-tightening of the locking means (21).
- An adjustable spanner as claimed in any preceding claim, wherein said locking member (17) is resiliently biased away from said movable jaw by means of a spring (42).
- An adjustable spanner as claimed in any preceding claim, wherein said first (15) and second (16) sets of serrations have a pitch distance corresponding to the increments in size of the nuts to be turned by the spanner.
- An adjustable spanner as claimed in any preceding claim, wherein a scale (20) is provided on said fixed or movable jaw and a pointer (19) is provided on said movable or fixed jaw respectively, whereby the spanner setting may be indicated.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB919107930A GB9107930D0 (en) | 1991-04-15 | 1991-04-15 | Adjustable spanners |
GB9107930 | 1991-04-15 | ||
GB9113264 | 1991-06-19 | ||
GB919113264A GB9113264D0 (en) | 1991-06-19 | 1991-06-19 | Adjustable spanners |
PCT/GB1992/000649 WO1992018288A1 (en) | 1991-04-15 | 1992-04-10 | Adjustable spanners |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0580680A1 EP0580680A1 (en) | 1994-02-02 |
EP0580680B1 true EP0580680B1 (en) | 1997-07-16 |
Family
ID=26298728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92908444A Expired - Lifetime EP0580680B1 (en) | 1991-04-15 | 1992-04-10 | Adjustable spanners |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0580680B1 (en) |
JP (1) | JPH06509029A (en) |
CN (1) | CN1034000C (en) |
AT (1) | ATE155383T1 (en) |
AU (1) | AU659147B2 (en) |
DE (1) | DE69220934T2 (en) |
ES (1) | ES2106861T3 (en) |
WO (1) | WO1992018288A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9214699D0 (en) * | 1992-07-10 | 1992-08-19 | Harrison Ian A | Adjustable spanner |
GB2453739A (en) * | 2007-10-16 | 2009-04-22 | A R Howe | Lockable spanner or wrench for tap |
DE202009006518U1 (en) | 2009-05-05 | 2009-07-30 | Engel, Florian | Self-holding fork wrench with manual adjustment of the wrench size |
TW201520002A (en) * | 2013-11-19 | 2015-06-01 | New Way Tools Co Ltd | Adjustable wrench with reinforcing device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH88238A (en) * | 1920-05-19 | 1921-02-01 | Schaefer Robert | Adjustable wrench. |
US3535959A (en) * | 1968-04-26 | 1970-10-27 | Eugene T Riza | Adjustable wrench |
US4106372A (en) * | 1977-04-12 | 1978-08-15 | Robert A. Dexter | Adjustable end wrench |
GB8926921D0 (en) * | 1989-11-29 | 1990-01-17 | Harrison Ian A | Adjustable spanner |
-
1992
- 1992-04-10 AT AT92908444T patent/ATE155383T1/en not_active IP Right Cessation
- 1992-04-10 JP JP4508034A patent/JPH06509029A/en active Pending
- 1992-04-10 DE DE69220934T patent/DE69220934T2/en not_active Expired - Fee Related
- 1992-04-10 WO PCT/GB1992/000649 patent/WO1992018288A1/en active IP Right Grant
- 1992-04-10 ES ES92908444T patent/ES2106861T3/en not_active Expired - Lifetime
- 1992-04-10 AU AU16417/92A patent/AU659147B2/en not_active Ceased
- 1992-04-10 EP EP92908444A patent/EP0580680B1/en not_active Expired - Lifetime
- 1992-04-15 CN CN92102657.9A patent/CN1034000C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69220934D1 (en) | 1997-08-21 |
AU659147B2 (en) | 1995-05-11 |
WO1992018288A1 (en) | 1992-10-29 |
CN1034000C (en) | 1997-02-12 |
DE69220934T2 (en) | 1998-03-05 |
ATE155383T1 (en) | 1997-08-15 |
EP0580680A1 (en) | 1994-02-02 |
CN1065821A (en) | 1992-11-04 |
ES2106861T3 (en) | 1997-11-16 |
AU1641792A (en) | 1992-11-17 |
JPH06509029A (en) | 1994-10-13 |
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