Abstract:
A monkey wrench includes a body, a first jaw, a second jaw and a press member. The second jaw is linearly movable relative to the body. The first and second jaws each have an operation member which has second teeth defied in on side thereof. The second jaw has first teeth on the top thereof and the press member has third teeth. When pivoting the press member to engage the third teeth with the first teeth, the second jaw is secured. A resilient member is connected to the second jaw which is movable when the press member is pivoted in the opposite direction to disengage the third teeth from the first teeth.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Fields of the invention 
         [0002]    The present invention relates to a monkey wrench, and more particularly, to a monkey wrench wherein the movement of the movable jaw is controlled by a press member. 
         [0003]    2. Descriptions of Related Art 
         [0004]    The conventional monkey wrench, such as the monkey wrench disclosed in U.S. Pat. No. 1027203, generally comprises an L-shaped body, a movable member with a U-shaped cross section, a press member, an engaging member and a resilient member. The body has a first jaw connected thereto. The movable member is located at the range of the engaging member, and has a recess which has two open ends. A reception hole and a notch are respectively defined in the recess. The press member has a U-shaped connection portion and a press portion which is located in the notch. The connection portion has a first pivotal portion. The engaging member is located in the reception hole and pivotably connected to the first pivotal portion. The engaging member is engaged with the engaging portion. The resilient member biases the engaging member onto the engaging portion. However, the engaging portion is longer than the movable member and exposed outside of the body. When pressing the press portion, the engaging member is disengaged from the engaging portion, so that the movable member is freely movable relative to the body. This may make the movable member, the press member, the engaging member and the resilient member to be shifted and removed from their positions. The connection portion and the press portion of the press member are difficult to be machined. Furthermore, the reception hole and the notch in the recess are different machined. 
         [0005]    The present invention intends to provide a monkey wrench to eliminate the shortcomings mentioned above. 
       SUMMARY OF THE INVENTION 
       [0006]    The present invention relates to a monkey wrench and comprises a body, a first jaw, a second jaw and a press member. The second jaw is linearly movable relative to the body. The first and second jaws each have an operation member which has second teeth defied in on side thereof. The second jaw has first teeth on the top thereof and the press member has third teeth. When pivoting the press member to engage the third teeth with the first teeth, the second jaw is secured. A resilient member is connected to the second jaw which is movable when the press member is pivoted in the opposite direction to disengage the third teeth from the first teeth. 
         [0007]    The primary object of the present invention is to provide a monkey wrench wherein the second jaw is secured or moveable by pivoting a press member. 
         [0008]    The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]      FIG. 1  is an exploded view of the monkey wrench of the present invention; 
           [0010]      FIG. 2  is a perspective view to show the monkey wrench of the present invention; 
           [0011]      FIG. 3  is a top view to show the monkey wrench of the present invention; 
           [0012]      FIG. 4  is a cross sectional view, taken along line B-B in  FIG. 3 ; 
           [0013]      FIG. 5  is a side cross sectional view of the monkey wrench of the present invention; 
           [0014]      FIG. 6  is a top view to show that the adjustment of the second jaw of the monkey wrench of the present invention; 
           [0015]      FIG. 7  is a cross sectional view, taken along line B-B in  FIG. 6 ; 
           [0016]      FIG. 8  is a perspective view to show the second embodiment of the monkey wrench of the present invention; 
           [0017]      FIG. 9  is a perspective view to show the third embodiment of the monkey wrench of the present invention, and 
           [0018]      FIG. 10  is a perspective view to show the fourth embodiment of the monkey wrench of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0019]    Referring to  FIGS. 1 to 7 , the monkey wrench of the present invention comprises a body  10 , first jaw  20 , a second jaw  30 , two operation members  40 , a press unit  50 , a first control unit  60 , a second control unit  70 , a first rod  80  and a second rod  81 . 
         [0020]    The body  10  is an elongate body and has a U-shaped first recess  11  and a first pivotal portion  16 , wherein the first recess  11  which is defined by two sidewalls of the body  10 , and a first face  13  is connected between the two sidewalls. The body  10  has an open end  12  defined in the first end thereof, and a first circular hole  17  is defined through each of the sidewalls of the second end of the body  10 . The body  10  has two first holes  14  which are located close to the open end  12 . An elongate slot  15  is defined through each of the sidewalls and located higher than the first face  13 . The first pivotal portion  16  is located above the elongate slots  15 . The body  10  has a first threaded hole  18  defined in each of the two sidewalls thereof, and the threaded holes  18  are located at the middle portion of the body  10 . 
         [0021]    The first jaw  20  is an L-shaped jaw and partially located in the first recess  11 . The first jaw  20  has a first connection portion  21  on one end thereof. The first connection portion  21  has a first slot  22 , and multiple first connection holes  23  are defined through two sides defining the first slot  22 . Each first connection hole  23  has inner threads and communicates with the first slot  22 . The first jaw  20  has two second holes  24  in the other end thereof and the two second holes  24  are located corresponding to the first holes  14 . The first jaw  20  is connected to the body  10  by extending a fixing member  90  through one of the two first holes  14  and one of the second holes  24 . 
         [0022]    The second jaw  30  is an elongate jaw, and a second connection portion  31  and a notch  37  are respectively formed on two ends of the second jaw  30 . Multiple first teeth  34  are defined in the top of the second jaw  30 . The second jaw  30  has a second face  35  defined in the underside thereof so as to be in contact with the first face  13 . The second jaw  30  is received in the first recess  11  and slidable on the first face  13 . The second connection portion  31  has a second slot  32 , and multiple second connection holes  33  are defined through two sides defining the second slot  32 . Each second connection hole  33  has inner threads and communicates with the second slot  32 . The second jaw  30  has a third hole  36  defined transversely therethrough. A second threaded hole  39  is defined in the top of the second jaw  30 . The third hole  36  is located corresponding to the elongate slots  15 . The notch  37  has two extensions and each extension has a second circular hole  38 . The distance between the second threaded hole  39  and the second connection portion  31  is longer than the distance between the second threaded hole  39  and the notch  37 . The first jaw  20  is partially located above the second jaw  30  which is linearly movable along the first face  13 . The second circular hole  38  and the second threaded hole  39  are located on different sides of the second jaw  30 . 
         [0023]    The two operation members  40  each have second teeth  41  defined in a face thereof. The two operation members  40  are respectively connected to the first connection portion  21  and the second connection portion  31 . Each of the two operation members  40  is a T-shaped cross section and has a third connection portion  42  which is engaged with the first slot  22  or the second slot  32 . The second teeth  41  of each operation member  40  are extend transversely. The two respective faces having the second teeth  41  of the operation members  40  face each other. The third connection portion  42  of each operation member  40  has third connection holes  43 . Multiple first connection members  48  extend through the first connection holes  23  or the second connection holes  33  and are connected to the third connection holes  43  to connect the operation members  40  to the first connection portion  21  and the second connection portion  31 . The first connection members  48  can be bolts. 
         [0024]    The press unit  50  comprises a press member  51 , a first resilient member  52  and a first rivet  53 . The press member  51  has a second pivotal portion  511 , and multiple third teeth  512  extend longitudinally on the press member  51 . The first rivet  53  extends through the second pivotal portion  511  and the first pivotal portion  16 . The press member  51  is pivotally connected to the body  10 . The press member  51  is connected with the first resilient member  52  and pivotable about the first rivet  53 . When the first resilient member  52  biases the press member  51  to engage the third teeth  512  with the first teeth  34 , the second jaw  30  is secured in the first recess  11 . The two operation members  40  are then able to clamp an object therebetween. In detail, the first resilient member  52  has a loop  521  which is located corresponding to the second pivotal portion  511 . A first biasing portion  522  and a second biasing portion  523  are located on two ends of the first resilient member  52 . The first biasing portion  522  biases the first teeth  34 , and the second biasing portion  523  hooks to the press member  51  and biases the press member  51  so as to engage the third teeth  512  with the first teeth  34 . The first rivet  53  extends through the first pivotal portion  16 , the second pivotal portion  511  and the loop  521 . 
         [0025]    The first control unit  60  comprises a control rod  61 , two first control members  62  and two clips  63 . The control rod  61  extends through the elongate slots  15  and the third hole  36 . The control rod  61  has a groove defined in each of two ends thereof, and the two ends of the control rod  61  are exposed out from the body  10 . The first control members  62  are connected to two ends of the control rod  61 . Each first control member  62  contacts the outside of one of the two sidewalls. The two control members  62  are located symmetrically relative to the body  10  and each are a rectangular member. Each of the control members  62  has a fourth hole  621  through which one of the two ends of the control rod  61  extends. The two clips  63  are engaged with the two grooves  610  of the two ends of the control rod  61  to connect the control members  62  to the control rod  61 . The first control members  62  are pushed to drive the control rod  61  and the second jaw  30  to respectively move linearly along the elongate slot  15  and the first recess  11 . 
         [0026]    The second control unit  70  comprises a second control member  71  and a second connection member  72 . The second control member  71  is connected to the second jaw  30  so that when the second control member  71  is moved, the second jaw  30  moves linearly in the first recess  11 . The second control member  71  is fixed to the second jaw  30  and located close to the notch  37 . The second control member  71  has a fifth hole  711  in the center thereof, and the fifth hole  711  located corresponding to the second threaded hole  39 . The second connection member  72  extends through the fifth hole  711  and is threadedly connected to the second threaded hole  39 . The second control member  71  is connected to the second jaw  30  by the second connection member  72 . 
         [0027]    The first rod  80  is snugly connected to the second circular holes  38  of the second jaw  30 , and the second rod  81  is snugly connected to the first circular holes  17  of the body  10 . A second resilient member  82  is located in the first recess  11  to resiliently connect the second jaw  30  to the body  10 . The second resilient member  82  has a hook on each of two ends thereof, the two hooks are respectively connected to the first and second rods  80 ,  81 . 
         [0028]    The user can pivots the press member  51  to control the engagement between the third teeth  512  of the press member  51  and the first teeth  34  of the second jaw  30  to secure the second jaw  30  or to allow the second jaw  30  to linearly move along the first face  13  in the first recess  11 . 
         [0029]    When the third teeth  512  of the press member  51  are disengaged from the first teeth  34  of the second jaw  30 , the user can also push one of the first control members  62  to respectively linearly move the control rod  61  and the second jaw  30  in the elongate slot  15  and the first recess  11 . By pushing the second control member  71 , the user can also move the second jaw  30  in the first recess  11 . 
         [0030]      FIG. 8  shows that the second embodiment comprises a bracket  91  and two third connection members  92 . The bracket  91  is a U-shaped member and mounted across the two sidewalls of the body  10 . A first resilient member  52  is connected between the press member  51  and the bracket  91 . The third connection member  92  extends through the bracket  91  and connected to the first threaded holes  18  (Referring to  FIGS. 1 and 8 ). 
         [0031]      FIG. 9  shows the third embodiment of the present invention, wherein there is no second control unit  70  available. 
         [0032]      FIG. 10  shows the fourth embodiment of the present invention, wherein there is no first control unit  60  available. 
         [0033]    It is noted that the first connection portion  21  can be integrally formed with the operation member  40 , and the second connection portion  31  can be integrally formed with the operation member  40 . Similarly, the first jaw  20  is integrally formed with the body  10 . The fixing member  90  is connected to the first holes  14 . The second jaw  30  located in the first recess  11  and is restricted by the fixing member  90 . The first control member  62  can be integrally formed with the control rod  61 . The first rod  80 , the second rod  82  and the second resilient member  82  can also be omitted. 
         [0034]    The first teeth  34  are hidden in the first recess  11  so that the user&#39;s fingers do not contact the first teeth  34 . The press member  51  is pivotably connected to the first pivotal portion  16 , the user can easily and comfortably operate the press member  51 . The second jaw  30  can be secured when the third teeth  512  are engaged with the first teeth  34 . When the third teeth  512  are disengaged from the first teeth  34 , the second jaw  30  can be moved by either operating the first control member  62  or the second control member  71 . There is one first control member  62  on each of the two sidewalls of the body  10  so that left-handed and right-handed user can easily use the present invention. 
         [0035]    While we have shown and described the embodiment 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.