Abstract:
A dual-purpose pliers adapted to chain link applies to concurrently promote a separation of two first jaw parts or an approach of two second jaw parts, which is conducive to a convenient detachment or assemblage of a master chain link via merely using a driving tool. Further, each jaw part forms a curved brim represented by an arcuate contour, a serrated shape, or the combination thereof. Accordingly, the curved brim serves to encircle and lean against a periphery of a chain pin of the chain for a stable manipulation.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a pliers adapted to chain link, in particular a tool adapting to detach master chain link of the bicycle chain. 
         [0003]    2. Description of the Related Art 
         [0004]    A conventional chain link of the bicycle chain commonly adds an exterior link plate and disposes respective annular grooves on either end or both ends of a chain pin. Concerning to the assembling, a C-shape buckling part is disposed relative to the exterior plate, by which the plate could be clasped on the annular groove to prevent the escape of the chain pin. 
         [0005]    Further concerning to the detachment, the above typical invention needs to use specific tools to execute the dismantlement with following steps: initially fasten the chain link, force the exterior link plate to open, and thence extrude the chain pin out via a pusher. Such typical chain detacher is generally classified into IPC B21L 21/00. 
         [0006]    As in a prior invention, FIG. 1 of  ┌ KNUCKLE CONNECTOR FOR CONNECTING END KNUCKLES OF A CHAIN STRAND ┘  published by U.S. Pat. No. 5,291,730, or another prior invention, FIG. 1 to FIG. 3 of  ┌ MASTER CHAIN LINK ┘  published by U.S. Pat. No. 5,362,282, mainly directed to a chain link configuration. It should note that nowhere professional or specific tools could be in normal to the detachment of such chain link. Instead, a commonly manual tool is well-known used to accomplish its detachment, for instance of a long flat nose pliers which could be utilized to forcedly propel the chain pin from the buckled groove into a free orifice. Similarly, to assemble this chain link, the same tool is also used for push the chain pin from the orifice into the groove. However, the typical master chain link facilely cause the chain pin slipped and inconvenient operation as a result of the pin formed of an arcuate contour that leads to the chain pin merely contacting with the jaw part of the pliers at one point. 
         [0007]    Furthermore, the detachment and assemblage of the master chain link are totally contrary, namely the tool needs to clamp and compress the chain pin from outside toward inside for the detachment and in contrast, to force the space among chain pins open from inside toward outside for the assemblage. With regard to the well-known long flat nose pliers without elasticity essentially set by closing when in non-use and configured by crossly pivoting the left pliers body with the right one, it should be apparent to those skilled in the art that such design would require larger force for pulling the pin apart. In contrast, if the pliers is set by opening and configured by two parallel bodies that intersect at a middle portion, it may save more force accordingly, but two distinct pliers would be inevitably necessary for respectively dismantling and assembling the chain link. 
         [0008]    Therefore, it is respectfully submitted that the typical invention is currently devoid of a distinct tool possessing dual-utilization in normal to detach and assemble the master chain link. 
       SUMMARY OF THE INVENTION 
       [0009]    Therefore, the object of the present invention is to solve the aforementioned problems and to provide a kind of dual-purpose pliers adapted to chain link, which particularly includes the structure of curved brims disposed on jaw parts of the pliers tip sections and preferably represents the curved brims into serrated contour. Accordingly, the curved brims could densely lean against an arcuate surface of the chain pin and thence provides at least one arch enclosure therearound, so as to improve and prevent the occurrence of slipped chain pin. 
         [0010]    A preferred embodiment of the dual-purpose pliers in conformity with the present invention comprises a pliers handle, a first pliers body, and a second pliers body; wherein, the first pliers body connects with the pliers handle; further, the first pliers body has two first tip sections, and the first tip sections bend distal ends thereof to form two first jaw parts extending from the distal ends, respectively. At least one of the first jaw parts has a first curved brim defined thereon. Additionally, the second pliers body connects with the pliers handle. The second pliers body has two second tip sections, and the second tip sections bend distal ends thereof to form two second jaw parts extending from the distal ends, respectively. At least one of the second jaw parts has a second curved brim defined thereon. The two first jaw parts are subjected to open as well as two second jaw parts are subjected to close via constricting the pliers handle. 
         [0011]    Preferably, the pliers handle includes two grasp portions, two fastening pins, a pivoting shaft, and a spring; each of the two grasp portions has one end thereof fixed by the fastening pin and pivotally engaged with the pivoting shaft at a place adjacent to the fastening pin. The spring disposed between the two grasp portions includes two opposite ends, and the two ends of the spring are separately positioned to the two grasp portions; 
         [0012]    The first pliers body includes a first left-side pliers plate, a first right-side pliers plate, and a first pivoting pin; wherein, the first left-side and right-side pliers plates have respective first tip sections, and the first left-side pliers plate is coupled with the first right-side pliers plate by the first pivoting pin; a first orifice is defined between each of the first tip sections as well as the first pivoting pin, which allows the fastening pin of the pliers handle to penetrate through the first orifice to secure on the pliers handle. Each of the first tip sections is flexure at a distal end thereof for each first jaw part to stretch therefrom; at least one of the first jaw parts has the first curved brim defined thereon. 
         [0013]    The second pliers body includes a second left-side pliers plate, a second right-side pliers plate, and a second pivoting pin; wherein, the second left-side pliers plate and right-side pliers plate have respective second tip sections as well as joint sections disposed reversely to the second tip sections. 
         [0014]    The second left-side pliers plate is coupled with the second right-side pliers plate by the second pivoting pin. 
         [0015]    Each of the joint sections as well as the second pivoting pin defines a second orifice formed therebetween, which allows the fastening pin of the pliers handle to penetrate through the second orifice to secure on the pliers handle; each of the second tip sections is flexure at a distal end thereof for each second jaw part to stretch therefrom; at least one of the second jaw parts has the second curved brim defined thereon. 
         [0016]    A further preferred embodiment of the dual-purpose pliers in conformity with the present invention comprises a pliers handle and a pliers body; wherein, the pliers body connects with the pliers handle and has two opposite first tip sections and second tip sections. The first tip sections bend distal ends thereof to form two first jaw parts extending from the distal ends, respectively, and the second tip sections bend distal ends thereof to form two second jaw parts extending from the distal ends, respectively; the first jaw parts and the second jaw parts have at least one curved brim defined thereon, respectively, so that the two first jaw parts are subjected to separation at the same time the two second jaw parts suffers for close while constricting the pliers handle. 
         [0017]    A further preferred embodiment of the dual-purpose pliers in conformity with the present invention comprises a pliers handle and two pliers bodies; the pliers handle serves to connect and drive the pliers bodies; wherein, the two pliers bodies have two opposite first tip sections and second tip sections. Between the first tip sections and the second tip sections, a connecting portion is disposed. The first tip sections respectively bend distal ends thereof to form two first jaw parts extending from the distal ends, and the second tip sections respectively bend distal ends thereof to form two second jaw parts extending from the distal ends. The first jaw parts of the first tip sections have at least one first curved brim defined thereon, and the second jaw parts of the second tip sections have at least one second curved brim defined thereon. 
         [0018]    Preferably, the first jaw parts and the second jaw parts form respective curved brims thereon; the first curved brims on the first jaw parts are orientated in relation to contrary directions, and the second curved brims on the second jaw parts are disposed to face with each other. 
         [0019]    Preferably, each of the curved brims is either formed in an arcuate shape, is shaped by a serrate structure, or is arranged in light of a combination of the arcuate shape and the serrate structure. 
         [0020]    From above, in manipulation, users can grip the pliers handle to drive the two pliers bodies to dismantle the chain link and allow reversing the pliers handle to achieve the assemblage the chain link in light of the same driving manner. 
         [0021]    Accordingly, the present invention has following advantages:
   1. The present invention efficiently spends less time and saves more labors while in use.   2. The present invention represents the dual-function pliers, and so facilitates a convenient manipulation and attains favorable detachment and assemblage without extra tools.   3. The curved brims or serrated configuration defined on the jaw parts substantially leans against the chain pin to avert the slipping problem.   
 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0025]      FIG. 1  is an exploded view showing a first preferred embodiment of the present invention; 
           [0026]      FIG. 2  is a perspective view showing the first preferred embodiment of the present invention; 
           [0027]      FIG. 3  is a perspective view showing the present invention reversing about 180 degrees reliant on  FIG. 2 ; and 
           [0028]      FIG. 4  is an exploded view showing a second preferred embodiment of the present invention; 
           [0029]      FIG. 5  is a perspective view showing the second preferred embodiment of the present invention; and 
           [0030]      FIG. 6  is a perspective view showing a third preferred embodiment. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0031]    Referring to  FIGS. 1 to 3 , the dual-purpose pliers of the present invention comprises a pliers handle  1 , a first pliers body  2 , and a second pliers body  3 . The first pliers body  2  connects with the pliers handle  1 . The first pliers body  2  has two first tip sections  21 , and the first tip sections  21  respectively bend distal ends thereof to form two first jaw parts  211  extending from the distal ends, so that the two first jaw parts  211  are subjected to separation via constricting the pliers handle  1 . Furthermore, the second pliers body  3  connects with the pliers handle  1  as well. The second pliers body  3  has two second tip sections  31 , and the second tip sections  31  bend distal ends thereof to form two second jaw parts  311  extending from the distal ends, respectively, whereby the two second jaw parts  311  are subjected to close via constricting the pliers handle  1 . The aforementioned first jaw parts  211  and second jaw parts  311  respectively have first and second curved brims  212 , 312  defined thereon. The first curved brims  212  on the first jaw parts  211  are orientated in relation to contrary directions, and the second curved brims  312  on the second jaw parts  311  are disposed to face with each other. It is noted that each of the curved brims  212 , 312  could be either formed by an arcuate shape or a serrate structure disposed as labeled by  212 , 312 . Alternatively, the curved brims  212 , 312  may be further configured into a combination of the arcuate shape and the serrate structure. 
         [0032]    Still referring to  FIGS. 1 to 3 , the detail concatenation of interrelated elements of the subject dual-purpose pliers in accordance with a first embodiment of the present invention includes a pliers handle  1 , a first pliers body  2 , and a second pliers body  3 . The pliers handle  1  has two grasp portions  11 , two fastening pins  12 , a pivoting shaft  13 , and a spring  14 . Each of the two grasp portions  11  has one end  111  thereof fixed by the fastening pin  12  and pivotally engaged with the pivoting shaft  13  at a place adjacent to the fastening pin  12 . The spring  14  located between the two grasp portions  11  includes two opposite ends  141 , 142  separately fixed to the two grasp portions  11 . Furthermore, the first pliers body  2  includes a first left-side pliers plate  22 , a first right-side pliers plate  23 , and a first pivoting pin  24 . The first left-side pliers plate  22  and the right-side pliers plate  23  have respective first tip sections  21 , and the first left-side pliers plate  22  is coupled with the first right-side pliers plate  23  by the first pivoting pin  24 . Between each of the first tip sections  21  and the first pivoting pin  24 , a first orifice  25  is defined, which allows the fastening pin  12  of the pliers handle  1  to penetrate through the first orifice  25  to secure on the pliers handle  1 . Each of the first tip sections  21  is flexure at a distal end thereof for a first jaw part  211  to stretch therefrom, and every one of the first jaw parts  211  has a first curved brim  212  defined thereon. Herein, the two first curved brims  212  of the two first jaw parts  211  are orientated toward different directions. As to the second pliers body  3  includes a second left-side pliers plate  32 , a second right-side pliers plate  33 , and a second pivoting pin  34 . The second left-side pliers plate  32  and the right-side pliers plate  33  have respective second tip sections  31  as well as joint sections  35  disposed opposite to the second tip sections  31 . The second left-side pliers plate  32  is coupled with the second right-side pliers plate  33  by the second pivoting pin  34 . Each of the joint sections  35  as well as the second pivoting pin  34  respectively defines a second orifice  36  formed therebetween, which allows the fastening pin  12  of the pliers handle  1  to penetrate through the second orifice  36  to secure on the pliers handle  1 . Furthermore, each of the second tip sections  31  is flexure at a distal end thereof for a second jaw part  311  to extendably protrude therefrom, and every one of the second jaw parts  311  has a second curved brim  312  defined thereon. Herein, the second curved brims  312  of the two second jaw parts  311  are arranged to face with each other. 
         [0033]    Similarly, it is noted that each of the curved brims  212 , 312  could be either formed by an arcuate shape or a serrate structure disposed as labeled by  212 , 312 . Alternatively, the curved brims  212 , 312  may be further configured into a combination of the arcuate shape and the serrate structure. 
         [0034]    In use, the first jaw part  211  or the second jaw part  311  would be inserted into an interstice between chain pins of a bicycle chain link. As shown in  FIG. 2 , the grasp portions  11  of the pliers handle  1  gripped as arrowed drives the two first jaw parts  211  to be inserted into the chain pin of the chain link from downwards toward upwards. In view of the two first curved brims  212  faced toward opposite orientations, the interstice would be thence subjected to an enlargement; that being said, the first curved brims  212  serves to prop against the chain pin and thence forces to enlarge the interstice so that the chain pin could be pushed from a free orifice on the chain link toward a buckled groove for positioning. With regard to the detachment of the chain link, the two second jaw parts  311  are inserted into the chain pin of the link from upwards toward downwards. In view of the second curved brims  312  faced with each other, the interstice would be thence subjected to a clamping force so that the chain pin would escape from the buckled groove and enter into the free orifice for smoothly detaching or dismantling the chain pin from the link. 
         [0035]    This embodiment may be used by reversing the pliers as shown in  FIG. 3  for executing the dismantlement. Whereas, it should note that the second jaw part  311  should be inserted between the chain pins of the bicycle chain link from downwards toward upwards. 
         [0036]    Referring to  FIGS. 4 and 5 , the dual-purpose pliers in accordance with a second embodiment of the present invention comprises a pliers handle  1 A and a pliers body  2 A; wherein, the pliers body  2 A connects with the pliers handle  1 A. Herein, the pliers body  2 A, as it is, replaces the combination of the first pliers body  2  and the second pliers body  3  as described in the first embodiment. Wherein, the pliers body  2 A has opposite first tip sections  21 A and second tip sections  22 A. The first tip sections  21 A respectively bend distal ends thereof to form two first jaw parts  211 A extending from the distal ends, and the second tip sections  22 A respectively bend distal ends thereof to form two second jaw parts  221 A extending from the distal ends, so that in case of constricting the pliers handle  1 A, the two first jaw parts  211 A would be subjected to separation accompanying with the close of the two second jaw parts  221 A. The first jaw parts  211 A and the second jaw parts  221 A have respective curved brims  212 A, 222 A defined thereon. The first curved brims  212 A on the first jaw parts  211 A are orientated in relation to contrary directions, and the second curved brims  222 A on the second jaw parts  221 A are disposed to face with each other. Furthermore, it is noted that each of the curved brims  212 A, 222 A could be either formed by an arcuate shape or a serrate structure disposed as labeled by  212 A, 222 A. Alternatively, the curved brims  212 A, 222 A may be further configured into a combination of the arcuate shape and the serrate structure. 
         [0037]    The operation of the second embodiment as shown in  FIG. 5  is also executed by holding the grasp portions of the pliers handle  1 A together with respect to the arrowed directions, so as to separate the two first jaw parts  211 A and render the two second jaw parts  221 A closed. The remaining procedures and actions are as the same as the first embodiment and herein are omitted. 
         [0038]    Referring to  FIG. 6 , the dual-purpose pliers in accordance with a third embodiment of the present invention comprises a pliers handle  1 B and two pliers bodies  2 B, 3 B. The pliers handle  1 B serves to connect and drive the pliers bodies  2 B, 3 B. The two pliers bodies  2 B, 3 B have opposite first tip sections  21 B and second tip sections  22 B, 32 B. Herein, the first tip sections of the pliers body  3 B are covered by the pliers body  2 B and are not labeled in the figure. The second tip sections  22 B, 32 B of two pliers bodies  2 B, 3 B are arranged in adverse directions, and so are the first tip sections. The first tip sections  21 B respectively bend distal ends thereof to form two first jaw parts  211 B extending from the distal ends and forms respective first curved brims  212 B thereon, and the second tip sections  22 B, 32 B respectively bend distal ends thereof to form two second jaw parts  221 B, 321 B extending from the distal ends and forms respective second curved brims  222 B, 322 B thereon. Further, the first curved brims  212 B on the first jaw parts  2113  are orientated in relation to contrary directions, and the second curved brims  222 B, 322 B on the second jaw parts  221 B, 321 B of the second tip sections  22 B of the pliers bodies  2 B, 3 B are disposed to face with each other. 
         [0039]    Moreover, it is noted that each of the curved brims  212 B, 312 B, 222 B could be either formed by an arcuate shape or a serrate structure disposed as labeled by  212 B, 312 B, 222 B. Alternatively, the curved brims  2128 , 3128 , 2228  may be further configured into a combination of the arcuate shape and the serrate structure. 
         [0040]    The operation of the third embodiment as shown in  FIG. 6  is also executed by holding the grasp portions of the pliers handle  1 B together with respect to the arrowed directions, so as to separate the two first jaw parts  211 B and render the two second jaw parts  221 B, 321 B closed. The remaining procedures and actions are as the same as the first preferred embodiment, whereas, this preferred embodiment herein is susceptible of a mutual contraposition by inward-outward and upward-downward reversing for attain various manipulating manners. 
         [0041]    Accordingly, in manipulation, users can grip the pliers handle to drive the two pliers bodies to dismantle the chain link and allow reversing the pliers handle to achieve the assemblage the chain link in light of the same driving manner. 
         [0042]    Further, the curved brims or serrated configuration defined on the jaw parts substantially leans against an arc surface of the chain pin without inducing the slipping problem. Additionally, users can merely utilize a single pliers to unconstrainedly dismantle and assemble the chain link without changing the tools, thereby increasing the convenience of utilization.