EP3689546B1 - Pipe wrench - Google Patents
Pipe wrench Download PDFInfo
- Publication number
- EP3689546B1 EP3689546B1 EP19154937.7A EP19154937A EP3689546B1 EP 3689546 B1 EP3689546 B1 EP 3689546B1 EP 19154937 A EP19154937 A EP 19154937A EP 3689546 B1 EP3689546 B1 EP 3689546B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pivot
- hole
- pipe wrench
- guide
- toothed
- 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.)
- Active
Links
- 230000007246 mechanism Effects 0.000 claims description 34
- 238000005192 partition Methods 0.000 claims description 8
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000295 complement effect Effects 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
- B25B13/10—Spanners; Wrenches with adjustable jaws
- B25B13/12—Spanners; Wrenches with adjustable jaws the jaws being slidable
- B25B13/20—Arrangements for locking the jaws
- B25B13/22—Arrangements for locking the jaws by ratchet action or toothed bars
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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
- B25B13/48—Spanners; Wrenches for special purposes
- B25B13/50—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes
- B25B13/5008—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes for operating on pipes or cylindrical objects
- B25B13/5016—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes for operating on pipes or cylindrical objects by externally gripping the pipe
- B25B13/5025—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes for operating on pipes or cylindrical objects by externally gripping the pipe using a pipe wrench type tool
- B25B13/5041—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes for operating on pipes or cylindrical objects by externally gripping the pipe using a pipe wrench type tool with movable or adjustable jaws
- B25B13/5058—Linearly moving or adjustable, e.g. with an additional small tilting or rocking movement
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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
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/06—Joints
- B25B7/10—Joints with adjustable fulcrum
Definitions
- the present invention relates to a pipe wrench.
- a pipe wrench includes a first lever member and a second lever member pivoted to each other, the first lever member has a slide slot, within the slide slot is a pivot, the second lever member is pivoted to the pivot to make the second lever member slide and swing relative to the first lever member.
- a first toothed portion of the first lever member is meshed with a second toothed portion of the pivot, through pressing the pivot to make the first toothed portion detach from the second toothed portion, the pivot and the second lever member can slide relative to the first lever member so as to adjust a relative distance between a first clamping portion of the first lever member which is fixed and a second clamping portion of the second lever member which is movable, and after adjustment, the second lever member is swingable to make the second clamping portion which is movable swing toward the first clamping portion which is fixed to clamp a rectangular or hexagonal joint of a pipe.
- Such pipe wrench is disclosed in CN204843895 .
- an elastic mechanism is provided at a bottom of the pivot and elastically biases the pivot to make sure that the second toothed portion of the pivot and the first toothed portion of the jaw are meshed with each other, as disclosed in CN106103000 , US2557296 , US4269089 and US2017/0066112 .
- the conventional pipe wrenches still have some disadvantages.
- the first toothed portion and the second toothed portion are meshed with each other to lock each other in position, when the pivot is pressed along an axial direction of the pivot, the first and second toothed portions can easily be detached from each other, and the pivot and the second lever member can slide relative to the first lever member; however, when the pivot is released, as shown in Fig.
- the first toothed portion B1 and the second toothed portion B2 move relatively horizontally, and due to tooth space and tooth type, an addendum of the first toothed portion and a dedendum of the second toothed portion cannot smoothly engaged with each other along the axial direction of the pivot B3, and the second toothed portion of the pivot cannot be smoothly meshed with the first toothed portion to position the pivot on a locked position. Therefore, the pivot and the second lever member still slide relative to the first lever member, a user needs to manually adjust relative positions of the pivot and the second lever member so that the pivot and the first lever member can be accurately meshed and positioned.
- the present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
- the major object of the present invention is to provide a pipe wrench, when a pivot is released, a guide toothed groove of a first lever member and a position-restricting toothed portion of the pivot can be easily locked, so the pivot can freely and quickly aligned to make the guide toothed groove and the position-restricting toothed portion easily meshed with each other, and the pivot can be quickly switched between a locked position or a released position to effectively elevate operation efficiency.
- a pipe wrench including a first lever member, a pivot and a second lever member.
- the first lever member includes a first grip portion, a first clamping portion and a body portion which is connected to and between the first grip portion and the first clamping portion, and the body portion has at least one guide toothed groove.
- the pivot is positionably and slidably disposed within the at least one guide toothed groove, the pivot is slidable along an axial direction to be on a locked position or a released position, the pivot has at least one position-restricting toothed portion and at least one elastic mechanism, and each of the at least one elastic mechanism corresponds to one of the at least one position-restricting toothed portion in the axial direction.
- the second lever member includes a second grip portion, a pivot hole and a second clamping portion, the pivot is disposed through and pivoted to the pivot hole, and through the second lever member sliding or swinging relative to the first lever member, the first clamping portion is slidable relative to the second clamping portion.
- a pipe wrench includes a first lever member 1, a pivot 2 and a second lever member 5.
- the first lever member 1 includes a first grip portion 11, a first clamping portion 12 and a body portion 13 which is connected to and between the first grip portion 11 and the first clamping portion 12, and the body portion 13 has at least one guide toothed groove 14.
- the pivot 2 is positionably and slidably disposed within the at least one guide toothed groove 14, the pivot 2 is slidable along an axial direction to be on a locked position or a released position, the pivot 2 has at least one position-restricting toothed portion 22 and at least one elastic mechanism 23, and each of the at least one elastic mechanism 23 corresponds to one of the at least one position-restricting toothed portion 22 along the axial direction.
- the second lever member 5 includes a second grip portion 31, a pivot hole 33 and a second clamping portion 41, the pivot 2 is disposed through and pivoted to the pivot hole 33, and through the second lever member 5 sliding or swinging relative to the first lever member 1, the first clamping portion 12 is slidable relative to the second clamping portion 41.
- the elastic mechanism 23 enters the gap between the guide toothed groove 14; when the pivot 2 is pressed to be on the released position completely, the position-restricting toothed portion 22 and the guide toothed groove 14 are detached from each other, the pivot 2 can be moved relatively horizontally along the guide toothed groove 14 to adjust an opening of the pipe wrench, at this moment, the elastic mechanism 23 is repeatedly pressed and reposition and can be engaged between the gap of the guide toothed groove 14 any time; when the pivot 2 is released, being guided by the elastic mechanism 23, the position-restricting toothed portion 22 and the guide toothed groove 14 can be easily meshed with each other and repositioned and locked on any position, at this moment, the pivot 2 is slidable to be on any position of the guide toothed groove 14, the bouncing 23 is freely compressed by a part of the guide toothed groove 14 near an addendum, the elastic mechanism 23 also freely repositions from near a part of the guide
- the pivot 2 and the second lever member 5 can slide along an extension direction of the guide toothed groove 14 (as shown in Figs. 10 and 11 ) to quickly adjust relative positions of the second lever member 5 and the first lever member 1.
- each of the elastic mechanism 23 and one of teeth of the position-restricting toothed portion 22 have a common central line widthwise across the guide toothed groove 14, and the position-restricting toothed portion 22 and the guide toothed groove 14 can easily aligned and meshed with each other and locked.
- the position-restricting toothed portion 22 and the guide toothed groove 14 can be quickly and easily aligned and meshed with each other, so that the disadvantage of the prior art that engagements of addendum flanks of the position-restricting toothed portion 22 and the guide toothed groove 14 along the axial direction makes the pivot 2 incapable of being positioned to the locked position can be prevented.
- the position-restricting toothed portion 22 and the guide toothed groove 14 can be smoothly and easily meshed with each other, and the pivot 2 can be quickly switched between the locked position and the released position to effectively elevate the operation efficiency.
- the body portion 13 includes two side plates 131 which correspond to each other and respectively have one of the at least one guide toothed groove 14, the two side plates 131 have a receiving groove 15 therebetween, one of two sides of each of the two side plates 131 has a slide slot 16, the two slide slots 16 and the two guide toothed grooves 14 are parallel to each other and non-overlapping,
- the second lever member 5 includes a driving grip 3 and a clamping member 4, the driving grip 3 and the first lever member 1 are pivoted to the pivot 2, one of two ends of the driving grip 3 has the second grip portion 31, the other of the two ends of the driving grip 3 has a cam 32, the driving grip 3 has the pivot hole 33,
- the clamping member 4 includes the second clamping member 41 and a slidable block 42 which are connected to each other, the slidable block 42 is slidable within the two slide slots 16, the clamping member 4 has a recessed portion 43, the cam 32 is abuttably inserted within the recessed portion 43, and through the driving grip
- the slidable block 42 of the clamping member 4 is rectangular columnar
- the two slide slots 16 are n-shaped slots to be complementary to the slidable block 42
- the recessed portion 43 is recessed on the slidable block 42
- the slidable block 42 and the two slide slots 16 can be in other shapes (for example, cylindrical and arc groove).
- the pivot 2 further has a first elastic member 24, the first elastic member 24 biases between the driving grip 3 and the pivot 2 to move the pivot 2 normally toward the locked position so that when the pivot 2 is not influenced by a force, the pivot 2 automatically aligns to the locked positon.
- each of at least one of the elastic mechanism 23 includes an engaging member 231 and a second elastic member 232
- the pivot 2 has at least one receiving hole 28, the engaging member 231 and the second elastic member 232 of each of the at least one elastic mechanism 23 are received within one of the at least receiving hole 28, and the second elastic member 232 normally biases the engaging member 231 toward an outside of the receiving hole 28.
- the engaging member 231 is a ball which can easily trip from the guide toothed groove 14, a hole diameter of the receiving hole 28 is slightly greater than a diametric dimension of the ball, and a surface of the receiving hole 28 is riveted so as to prevent the ball from falling off.
- the pivot 2 includes a first connecting member 25 and a second connecting member 26, the first connecting member 25 has a rod member 251, the rod member 251 is disposed through the pivot hole 33 of the second lever member 5, the second connecting member 26 is abuttably connected to one of two ends of the rod member 251, and a first elastic member 24 is sleeved to the rod member 251.
- the first and second connecting members 25, 26 respectively have a plurality of the position-restricting toothed portion 22, and in this embodiment, numbers of the at least one elastic mechanism 23 and the at least one receiving hole 28 are both two, the two elastic mechanisms 23 and the two receiving holes 28 are disposed on the first connecting member 23, and in other embodiments, the position-restricting toothed portion 22 and the receiving holes 28 may be arranged in other ways, not limited hereto.
- one of two ends of the rod member 251 which is remote from the first head portion 252 further has a protrusive portion 253 which has a smaller diameter
- the protrusive portion 253 is inserted into a through hole 262 of the second connecting member 26
- a fixing member 27 is screwed with the protrusive portion 253 from a side of the through hole 262 which is remote from the first connecting member 25, a greatest diametric dimension of the fixing member 27 is greater than a diametric dimension of the through hole 262 so that the first and second connecting members 25, 26 can easily fixed with each other
- two radial sides of the rod member 251 each have an engaging recess 254, a side of the second connecting member 26 facing the first connecting member 25 has a hole 263, the rod member 251 is inserted into the hole 263, the hole 263 communicates with the through hole 262, an internal circumferential wall of the hole 263 has two engaging protrusions 264, and each of the two engaging protrusions 264 is engaged with one of the two engaging
- a respective side of each of the at least one position-restricting toothed portion in the axial direction has a slant face section 221, and when the pivot 2 moves to the released position, the slant face section 221 of the position-restricting toothed portion 22 faces the guide toothed groove 24 to which the slant face section 221 corresponds.
- the slant face section 221 of each of the at least one position-restricting toothed portion 22 faces one of the at least one guide tooted groove 14 to which the slant face section 221 corresponds (as shown in Figs.
- the slant face section 221 slides into the guide toothed groove 4 first so that the position-restricting toothed portion 22 can be easily meshed with the guide toothed groove 14, and the pivot 2 can easily align to the locked position; therefore, the two slant face sections 221 of the two position-restricting toothed portions 22 allow the pivot 2 to move from the released portion to the locked position more easily.
- a shortest distance between the position-restricting toothed portion 22 and the elastic mechanism 23 to which the position-restricting toothed portion 22 corresponds defines a first length L1
- a thickness of the guide toothed groove 14 along the axial direction defines a second length L2
- the second length L2 is greater than the first length L1 (as shown in Fig. 5 ), so when the position-restricting toothed portion 22 has not tripped from the guide toothed groove 14, the elastic mechanism 23 enters the guide toothed groove 14, and the pivot 2 can be switched between the locked position and the released position more easily.
- a width of a bottom edge of the first connecting member 25 and an outer edge of the guide toothed groove 14 which the first connecting member 25 faces defines a third length L3, and the third length L3 is greater than the second length L2 (as shown in Figs. 5 and 5A ) to make sure that the pivot 2 can move to the released position completely (as shown in Fig. 7 ).
- the body portion 13A of the first lever member 1A does not have the two side plates 131 but has one of the at least one guide toothed groove 14A
- the second lever member 5A has two partitions 51
- the pivot hole 33A is disposed through the two partitions 51
- the first lever member 1A is disposed between the two partitions 51
- the pivot 2A is disposed through and pivoted to the pivot hole 33A of the two partitions 51.
- the pivot when the pivot aligns to the locked position, the elastic mechanism is releasably engaged with the guide toothed groove, the pivot can be smoothly aligned, and the position-restricting toothed portion and the guide toothed groove can be quickly and easily aligned to and meshed with each other; therefore, the position-restricting toothed portion and the guide toothed groove can be prevented from being engaged with each other along the axial direction and from making the pivot incapable of aligning to the locked position.
- the position-restricting toothed portion and the guide toothed groove can be easily meshed with each other, and the pivot can be quickly switched between the locked position and the released position to effectively elevate the operation efficiency.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Description
- The present invention relates to a pipe wrench.
- Generally, a pipe wrench includes a first lever member and a second lever member pivoted to each other, the first lever member has a slide slot, within the slide slot is a pivot, the second lever member is pivoted to the pivot to make the second lever member slide and swing relative to the first lever member. Normally, a first toothed portion of the first lever member is meshed with a second toothed portion of the pivot, through pressing the pivot to make the first toothed portion detach from the second toothed portion, the pivot and the second lever member can slide relative to the first lever member so as to adjust a relative distance between a first clamping portion of the first lever member which is fixed and a second clamping portion of the second lever member which is movable, and after adjustment, the second lever member is swingable to make the second clamping portion which is movable swing toward the first clamping portion which is fixed to clamp a rectangular or hexagonal joint of a pipe. Such pipe wrench is disclosed in
CN204843895 . In addition, to improve the seal tightness between the first and second lever members and the whole pipe wrench, an elastic mechanism is provided at a bottom of the pivot and elastically biases the pivot to make sure that the second toothed portion of the pivot and the first toothed portion of the jaw are meshed with each other, as disclosed inCN106103000 ,US2557296 ,US4269089 andUS2017/0066112 . - However, the conventional pipe wrenches still have some disadvantages. In normal state, the first toothed portion and the second toothed portion are meshed with each other to lock each other in position, when the pivot is pressed along an axial direction of the pivot, the first and second toothed portions can easily be detached from each other, and the pivot and the second lever member can slide relative to the first lever member; however, when the pivot is released, as shown in
Fig. 14 , the first toothed portion B1 and the second toothed portion B2 move relatively horizontally, and due to tooth space and tooth type, an addendum of the first toothed portion and a dedendum of the second toothed portion cannot smoothly engaged with each other along the axial direction of the pivot B3, and the second toothed portion of the pivot cannot be smoothly meshed with the first toothed portion to position the pivot on a locked position. Therefore, the pivot and the second lever member still slide relative to the first lever member, a user needs to manually adjust relative positions of the pivot and the second lever member so that the pivot and the first lever member can be accurately meshed and positioned. - The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
- The major object of the present invention is to provide a pipe wrench, when a pivot is released, a guide toothed groove of a first lever member and a position-restricting toothed portion of the pivot can be easily locked, so the pivot can freely and quickly aligned to make the guide toothed groove and the position-restricting toothed portion easily meshed with each other, and the pivot can be quickly switched between a locked position or a released position to effectively elevate operation efficiency.
- To achieve the above and other objects, a pipe wrench is provided, including a first lever member, a pivot and a second lever member. The first lever member includes a first grip portion, a first clamping portion and a body portion which is connected to and between the first grip portion and the first clamping portion, and the body portion has at least one guide toothed groove. The pivot is positionably and slidably disposed within the at least one guide toothed groove, the pivot is slidable along an axial direction to be on a locked position or a released position, the pivot has at least one position-restricting toothed portion and at least one elastic mechanism, and each of the at least one elastic mechanism corresponds to one of the at least one position-restricting toothed portion in the axial direction. The second lever member includes a second grip portion, a pivot hole and a second clamping portion, the pivot is disposed through and pivoted to the pivot hole, and through the second lever member sliding or swinging relative to the first lever member, the first clamping portion is slidable relative to the second clamping portion. When the pivot is on the locked position (when the pivot is not manually operate and not pressed), the position-restricting toothed portion and the guide toothed groove are meshed with each other, and the elastic mechanism is non-engaged with the guide toothed groove; when the pivot moves to the released position (when the pivot is manually pressed), the position-restricting toothed portion and the guide toothed groove are detached from each other, and the elastic mechanism is releasably engaged with the guide toothed groove.
- The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment(s) in accordance with the present invention.
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Fig. 1 is a stereogram of a preferred embodiment of the present invention; -
Fig. 2 is a breakdown view of the preferred embodiment of the present invention; -
Fig. 3 is a partially breakdown view of preferred embodiment of the present invention; -
Fig. 4 is another stereogram of the preferred embodiment of the present invention; -
Fig. 5 is a cross-sectional view of the preferred embodiment of the present invention when a pivot is on a locked position; -
Fig. 5A is a partially-enlarged view ofFig. 5 ; -
Fig. 6 is a cross-sectional operation view of the preferred embodiment of the present invention when the pivot moves to a half-released position; -
Fig. 7 is a cross-sectional operation view of the preferred embodiment of the present invention when the pivot moves to a released position completely; -
Figs. 8 and9 are drawings showing an operation of the preferred embodiment of the present invention; -
Figs. 10 and 11 are cross-sectional operation views, taken along line A-A ofFig. 8 ; -
Fig. 12 is a stereogram of another preferred embodiment of the present invention; -
Fig. 13 is a breakdown view of another preferred embodiment of the present invention; and -
Fig. 14 is a cross-sectional operation view of the pivot of a known pipe wrench. - The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.
- Please refer to
Figs. 1 to 11 for a preferred embodiment of the present invention, a pipe wrench includes afirst lever member 1, apivot 2 and asecond lever member 5. - The
first lever member 1 includes afirst grip portion 11, afirst clamping portion 12 and abody portion 13 which is connected to and between thefirst grip portion 11 and thefirst clamping portion 12, and thebody portion 13 has at least oneguide toothed groove 14. - The
pivot 2 is positionably and slidably disposed within the at least one guide toothedgroove 14, thepivot 2 is slidable along an axial direction to be on a locked position or a released position, thepivot 2 has at least one position-restrictingtoothed portion 22 and at least oneelastic mechanism 23, and each of the at least oneelastic mechanism 23 corresponds to one of the at least one position-restrictingtoothed portion 22 along the axial direction. - The
second lever member 5 includes asecond grip portion 31, apivot hole 33 and asecond clamping portion 41, thepivot 2 is disposed through and pivoted to thepivot hole 33, and through thesecond lever member 5 sliding or swinging relative to thefirst lever member 1, thefirst clamping portion 12 is slidable relative to thesecond clamping portion 41. - When the
pivot 2 is on the locked position, the position-restrictingtoothed portion 22 and the guide toothedgroove 14 are meshed with each other, and theelastic mechanism 23 is non-engaged with the guide toothedgroove 14; when thepivot 2 moves to the released position, the position-restrictingtoothed portion 22 and the guide toothedgroove 14 are detached from each other, and theelastic mechanism 23 is releasably engaged with the guide toothed groove 14 (as shown inFigs. 6 and7 ). Specifically, when thepivot 2 starts to be pressed for a small distance, theelastic mechanism 23 enters the gap between theguide toothed groove 14; when thepivot 2 is pressed to be on the released position completely, the position-restrictingtoothed portion 22 and theguide toothed groove 14 are detached from each other, thepivot 2 can be moved relatively horizontally along the guide toothedgroove 14 to adjust an opening of the pipe wrench, at this moment, theelastic mechanism 23 is repeatedly pressed and reposition and can be engaged between the gap of theguide toothed groove 14 any time; when thepivot 2 is released, being guided by theelastic mechanism 23, the position-restrictingtoothed portion 22 and the guide toothedgroove 14 can be easily meshed with each other and repositioned and locked on any position, at this moment, thepivot 2 is slidable to be on any position of theguide toothed groove 14, thebouncing 23 is freely compressed by a part of theguide toothed groove 14 near an addendum, theelastic mechanism 23 also freely repositions from near a part of theguide toothed groove 14 near a dedendum directly into a space between two gaps of the guide toothedgroove 14 to alternate repeatedly. Through the elastic mechanism tripping from theguide toothed groove 14, thepivot 2 and thesecond lever member 5 can slide along an extension direction of the guide toothed groove 14 (as shown inFigs. 10 and 11 ) to quickly adjust relative positions of thesecond lever member 5 and thefirst lever member 1. Because theelastic mechanism 23 is releasably engaged between the gap of theguide toothed groove 14, when thepivot 2 is released and back to a locked state, most parts of theelastic mechanism 23 automatically guide theelastic mechanism 23 to be between two gaps of the guide toothedgroove 14 except for a spot of theelastic mechanism 23 which is vertical to the addendum of theguide toothed groove 14, each of theelastic mechanism 23 and one of teeth of the position-restrictingtoothed portion 22 have a common central line widthwise across the guide toothedgroove 14, and the position-restrictingtoothed portion 22 and theguide toothed groove 14 can easily aligned and meshed with each other and locked. Therefore, when thepivot 2 is moving to the locked position, the position-restrictingtoothed portion 22 and theguide toothed groove 14 can be quickly and easily aligned and meshed with each other, so that the disadvantage of the prior art that engagements of addendum flanks of the position-restrictingtoothed portion 22 and the guide toothedgroove 14 along the axial direction makes thepivot 2 incapable of being positioned to the locked position can be prevented. With the present invention, the position-restrictingtoothed portion 22 and theguide toothed groove 14 can be smoothly and easily meshed with each other, and thepivot 2 can be quickly switched between the locked position and the released position to effectively elevate the operation efficiency. - Specifically, in this embodiment, the
body portion 13 includes twoside plates 131 which correspond to each other and respectively have one of the at least one guidetoothed groove 14, the twoside plates 131 have a receivinggroove 15 therebetween, one of two sides of each of the twoside plates 131 has aslide slot 16, the twoslide slots 16 and the twoguide toothed grooves 14 are parallel to each other and non-overlapping, thesecond lever member 5 includes adriving grip 3 and aclamping member 4, thedriving grip 3 and thefirst lever member 1 are pivoted to thepivot 2, one of two ends of thedriving grip 3 has thesecond grip portion 31, the other of the two ends of thedriving grip 3 has acam 32, thedriving grip 3 has thepivot hole 33, theclamping member 4 includes thesecond clamping member 41 and aslidable block 42 which are connected to each other, theslidable block 42 is slidable within the twoslide slots 16, theclamping member 4 has arecessed portion 43, thecam 32 is abuttably inserted within therecessed portion 43, and through thedriving grip 3 sliding or swinging relative to thefirst lever member 1, thecam 32 is capable of controlling theclamping member 4 to slide relative to thefirst lever member 1 so that the first andsecond clamping portions slidable block 42 of theclamping member 4 is rectangular columnar, the twoslide slots 16 are n-shaped slots to be complementary to theslidable block 42, therecessed portion 43 is recessed on theslidable block 42, and in other embodiments, theslidable block 42 and the twoslide slots 16 can be in other shapes (for example, cylindrical and arc groove). In this embodiment, thepivot 2 further has a firstelastic member 24, the firstelastic member 24 biases between the drivinggrip 3 and thepivot 2 to move thepivot 2 normally toward the locked position so that when thepivot 2 is not influenced by a force, thepivot 2 automatically aligns to the locked positon. - In addition, each of at least one of the
elastic mechanism 23 includes anengaging member 231 and a secondelastic member 232, thepivot 2 has at least one receivinghole 28, theengaging member 231 and the secondelastic member 232 of each of the at least oneelastic mechanism 23 are received within one of the at least receivinghole 28, and the secondelastic member 232 normally biases theengaging member 231 toward an outside of the receivinghole 28. In this embodiment, theengaging member 231 is a ball which can easily trip from the guide toothedgroove 14, a hole diameter of the receivinghole 28 is slightly greater than a diametric dimension of the ball, and a surface of thereceiving hole 28 is riveted so as to prevent the ball from falling off. - Preferably, the
pivot 2 includes a first connectingmember 25 and a second connectingmember 26, the first connectingmember 25 has arod member 251, therod member 251 is disposed through thepivot hole 33 of thesecond lever member 5, the second connectingmember 26 is abuttably connected to one of two ends of therod member 251, and a firstelastic member 24 is sleeved to therod member 251. It is to be noted that in this embodiment, the first and second connectingmembers toothed portion 22, and in this embodiment, numbers of the at least oneelastic mechanism 23 and the at least one receivinghole 28 are both two, the twoelastic mechanisms 23 and the two receivingholes 28 are disposed on the first connectingmember 23, and in other embodiments, the position-restrictingtoothed portion 22 and the receivingholes 28 may be arranged in other ways, not limited hereto. - In addition, one of two ends of the first connecting
member 25 and one of two ends of the second connectingmember 26 which are remote from each other respectively have afirst head portion 252 and asecond head portion 261 projecting radially, and diametric dimensions of thefirst head portion 252 and thesecond head portion 261 are each greater than a width of the guide toothedgroove 14 to prevent the first and second connectingmembers side plates 131. - Preferably, one of two ends of the
rod member 251 which is remote from thefirst head portion 252 further has aprotrusive portion 253 which has a smaller diameter, theprotrusive portion 253 is inserted into a throughhole 262 of the second connectingmember 26, a fixingmember 27 is screwed with theprotrusive portion 253 from a side of the throughhole 262 which is remote from the first connectingmember 25, a greatest diametric dimension of the fixingmember 27 is greater than a diametric dimension of the throughhole 262 so that the first and second connectingmembers rod member 251 each have anengaging recess 254, a side of the second connectingmember 26 facing the first connectingmember 25 has ahole 263, therod member 251 is inserted into thehole 263, thehole 263 communicates with the throughhole 262, an internal circumferential wall of thehole 263 has two engagingprotrusions 264, and each of the two engagingprotrusions 264 is engaged with one of the twoengaging recesses 254 to prevent the first and second connectingmembers - It is to be noted that in this embodiment, a respective side of each of the at least one position-restricting toothed portion in the axial direction has a
slant face section 221, and when thepivot 2 moves to the released position, theslant face section 221 of the position-restrictingtoothed portion 22 faces the guidetoothed groove 24 to which theslant face section 221 corresponds. Specifically, when thepivot 2 is moving from the released position to the locked position, if the position-restrictingtoothed portion 22 does not align to the guidetoothed groove 14 and cannot be meshed with the guidetoothed groove 14, theslant face section 221 of each of the at least one position-restrictingtoothed portion 22 faces one of the at least one guide tootedgroove 14 to which theslant face section 221 corresponds (as shown inFigs. 5 to 7 ), theslant face section 221 slides into the guidetoothed groove 4 first so that the position-restrictingtoothed portion 22 can be easily meshed with the guidetoothed groove 14, and thepivot 2 can easily align to the locked position; therefore, the twoslant face sections 221 of the two position-restrictingtoothed portions 22 allow thepivot 2 to move from the released portion to the locked position more easily. - Preferably, in this embodiment, along the axial direction a shortest distance between the position-restricting
toothed portion 22 and theelastic mechanism 23 to which the position-restrictingtoothed portion 22 corresponds defines a first length L1, a thickness of the guidetoothed groove 14 along the axial direction defines a second length L2, and the second length L2 is greater than the first length L1 (as shown inFig. 5 ), so when the position-restrictingtoothed portion 22 has not tripped from the guidetoothed groove 14, theelastic mechanism 23 enters the guidetoothed groove 14, and thepivot 2 can be switched between the locked position and the released position more easily. In addition, in this embodiment, along the axial direction a width of a bottom edge of the first connectingmember 25 and an outer edge of the guidetoothed groove 14 which the first connectingmember 25 faces defines a third length L3, and the third length L3 is greater than the second length L2 (as shown inFigs. 5 and5A ) to make sure that thepivot 2 can move to the released position completely (as shown inFig. 7 ). - Compared with the embodiment above, in another embodiment of the present invention of
Figs. 12 and13 , thebody portion 13A of thefirst lever member 1A does not have the twoside plates 131 but has one of the at least one guidetoothed groove 14A, thesecond lever member 5A has twopartitions 51, thepivot hole 33A is disposed through the twopartitions 51, thefirst lever member 1A is disposed between the twopartitions 51, and thepivot 2A is disposed through and pivoted to thepivot hole 33A of the twopartitions 51. Thereby, with a simpler structure of this embodiment, the relative positions of the second andfirst lever members pivot 2A still can be switched between the locked position and the released position to effectively elevate the operation efficiency. - Given the above, in the pipe wrench of the present invention, when the pivot aligns to the locked position, the elastic mechanism is releasably engaged with the guide toothed groove, the pivot can be smoothly aligned, and the position-restricting toothed portion and the guide toothed groove can be quickly and easily aligned to and meshed with each other; therefore, the position-restricting toothed portion and the guide toothed groove can be prevented from being engaged with each other along the axial direction and from making the pivot incapable of aligning to the locked position. In the present invention, the position-restricting toothed portion and the guide toothed groove can be easily meshed with each other, and the pivot can be quickly switched between the locked position and the released position to effectively elevate the operation efficiency.
- While we have shown and described various embodiments in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention as defined by the appended claims.
Claims (13)
- A pipe wrench, including:a first lever member (1), including a first grip portion (11), a first clamping portion (12) and a body portion (13) which is connected to and between the first grip portion (11) and the first clamping portion (12), the body portion (13) having at least one guide toothed groove (14);a pivot (2), positionably and slidably disposed within the at least one guide toothed groove (14), the pivot (2) being slidable along an axial direction to be on a locked position or a released position, the pivot (2) having at least one position-restricting toothed portion (22) and at least one elastic mechanism (23), each of the at least one elastic mechanism (23) corresponding to one of the at least one position-restricting toothed portion (22) in the axial direction;a second lever member (5), including a second grip portion (31), a pivot hole (33) and a second clamping portion (41), the pivot (2) being disposed through and pivoted to the pivot hole (33), through the second lever member (5) sliding or swinging relative to the first lever member (1), the first clamping portion (12) being slidable relative to the second clamping portion (41);wherein when the pivot (2) is on the locked position, the position-restricting toothed portion (22) and the guide toothed groove (14) are meshed with each other, and the elastic mechanism (23) is non-engaged with the guide toothed groove (14); when the pivot (2) moves to the released position, the position-restricting toothed portion (22) and the guide toothed groove (14) are detached from each other, and the elastic mechanism (23) is releasably engaged with the guide toothed groove (14).
- The pipe wrench of claim 1, wherein the elastic mechanism (23) includes an engaging member (231) and a second elastic member (232), the pivot (2) has at least one receiving hole (28), and the engaging member (231) and the second elastic member (232) of the elastic mechanism (23) are received within one of the at least receiving hole (28).
- The pipe wrench of claim 2, wherein the second elastic member (232) normally biases the engaging member (231) toward an outside of the receiving hole (28), the engaging member (231) is a ball, a hole diameter of the receiving hole (28) is slightly greater than a diametric dimension of the ball, and a surface of the receiving hole (28) is riveted so as to prevent the ball from falling off.
- The pipe wrench of claim 1, wherein the pivot (2) includes a first connecting member (25) and a second connecting member (26), the first connecting member (25) has a rod member (251), the rod member (251) is disposed through the pivot hole (33) of the second lever member (5), the second connecting member (26) is abuttably connected to one of two ends of the rod member (251), and a first elastic member (24) is sleeved to the rod member (251).
- The pipe wrench of claim 4, wherein one of two ends of the first connecting member (25) and one of two ends of the second connecting member (26) which are remote from each other respectively have a first head portion (252) and a second head portion (261) projecting radially, and diametric dimensions of the first head portion (252) and the second head portion (261) are each greater than a width of the guide toothed groove (14).
- The pipe wrench of claim 5, wherein one of two ends of the rod member (251) which is remote from the first head portion (252) further has a protrusive portion (253) which has a smaller diameter, the protrusive portion (253) is inserted into a through hole (262) of the second connecting member (26), a fixing member (27) is screwed with the protrusive portion (253) from a side of the through hole (262) which is remote from the first connecting member (25), a greatest diametric dimension of the fixing member (27) is greater than a diametric dimension of the through hole (262), two radial sides of the rod member (251) each have an engaging recess (254), a side of the second connecting member (26) facing the first connecting member (25) has a hole (263), the rod member (251) is inserted into the hole (263), the hole (263) communicates with the through hole (262), an internal circumferential wall of the hole (263) has two engaging protrusions (264), and each of the two engaging protrusions (264) is engaged with one of the two engaging recesses (254).
- The pipe wrench of claim 1, wherein a respective side of each of the at least one position-restricting toothed portion (22) in the axial direction has a slant face section (221), and when the pivot (2) moves to the released position, the slant face section (221) of the position-restricting toothed portion (22) faces the guide toothed groove (14) to which the slant face section (221) corresponds.
- The pipe wrench of claim 1, wherein along the axial direction a shortest distance between the position-restricting toothed portion (22) and the elastic mechanism (23) to which the position-restricting toothed portion (22) corresponds defines a first length (L1), a thickness of the guide toothed groove (14) along the axial direction defines a second length (L2), and the second length (L2) is greater than the first length (L1).
- The pipe wrench of claim 4, wherein along the axial direction a width of a bottom edge of the first connecting member (25) and an outer edge of the guide toothed groove (14) which the first connecting member (25) faces defines a third length (L3), and the third length (L3) is greater than the second length (L2).
- The pipe wrench of claim 1, wherein the first lever member (1) has one said guide toothed groove (14), the second lever member (5) has two partitions (51), the pivot hole (33) is disposed through the two partitions (51), the first lever member (1) is disposed between the two partitions (51), and the pivot (2) is disposed through and pivoted to the pivot hole (33) of the two partitions (51).
- The pipe wrench of claim 1, wherein the body portion (13) includes two side plates (131) which correspond to each other and respectively have one of the at least one guide toothed groove (14), the two side plates (131) have a receiving groove (15) therebetween, one of two sides of each of the two side plates (131) has a slide slot (16), the two slide slots (16) and the two guide toothed groove (14)s are parallel to each other and non-overlapping, the second lever member (5) includes a driving grip (3) and a clamping member (4), the driving grip (3) and the first lever member (1) are pivoted to the pivot (2), one of two ends of the driving grip (3) has the second grip portion (31), the other of the two ends of the driving grip (3) has a cam (32), the driving grip (3) has the pivot hole (33), the pivot (2) is disposed through the pivot hole (33), the clamping member (4) includes the second clamping member (4) and a slidable block (42) which are connected to each other, the slidable block (42) is slidable within the two slide slots (16), the clamping member (4) has a recessed portion (43), the cam (32) is abuttably inserted within the recessed portion (43), and through the driving grip (3) sliding or swinging relative to the first lever member (1), the cam (32) is capable of controlling the clamping member (4) to slide relative to the first lever member (1).
- The pipe wrench of claim 11, wherein the pivot (2) further has a first elastic member (24), and the first elastic member (24) biases between the driving grip (3) and the pivot (2) to make the pivot (2) normally move toward the locked position.
- The pipe wrench of claim 1, wherein each of the elastic mechanism (23) and one of teeth of the position-restricting toothed portion (22) have a common central line widthwise across the guide toothed groove (14).
Priority Applications (1)
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EP19154937.7A EP3689546B1 (en) | 2019-01-31 | 2019-01-31 | Pipe wrench |
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EP19154937.7A EP3689546B1 (en) | 2019-01-31 | 2019-01-31 | Pipe wrench |
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EP3689546B1 true EP3689546B1 (en) | 2021-08-04 |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114074303B (en) * | 2020-08-18 | 2023-08-22 | 吴明杰 | Open-end adjustable spanner |
TWI767517B (en) | 2021-01-14 | 2022-06-11 | 亨龍工業有限公司 | Adjustable wrench |
CN114668595B (en) * | 2022-03-30 | 2024-01-19 | 黄冈师范学院 | Self-locking mechanism and folding chair with same |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US2557296A (en) | 1948-02-16 | 1951-06-19 | Williams J H & Co | Pivot for adjustable fulcrum pliers |
US4269089A (en) | 1978-11-24 | 1981-05-26 | Hastings Charles E | Adjustable ratchet pliers |
DE102014102927A1 (en) | 2014-03-05 | 2015-09-10 | Knipex-Werk C. Gustav Putsch Kg | tongs |
CN204843895U (en) | 2015-08-27 | 2015-12-09 | 上海美瑞实业有限公司 | Keep silent fast accent pincers of parallel translation |
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