Abstract:
The present invention pertains to a jaw pipe wrench with resilient member comprising a wrench body penetrating through an actuating jaw, where a resilient member mounted and provides with one flat surface leans against said wrench body, so as to drive a serrated section of the wrench body firmly contacting with a serrated section of actuating jaw. While in manipulation, users initially propel the actuating jaw and synchronically compress the resilient member, the serrated section of the wrench body thus moves away from the serrated section of the actuating jaw, whereby users can freely raise or descend the actuating jaw in time of clamping, thus increasing the convenience of using.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a wrench tool, in particularly a jaw pipe wrench with resilient member. 
         [0003]    2. Description of the Related Art 
         [0004]    Generally, a conventional wrench often provides with a fastener, e.g. a screw, for screwing an upper jaw and a lower jaw, and users used to rotate the screw for adjusting the space between the two jaws. In practical, users need to have both hands grip the handle and simultaneously free the screw, further, the screw used to have small pitch for ensuring the gripping capability of the wrench. In this manner, users need to spend more time loosening the screw and adjusting the space of two jaws, thus increasing the inconvenience of using. 
         [0005]    In view of the above problem, another conventional wrench relies on a toothlike element between the two jaws as disclosed in U.S. Pat. No. 6,938,525, namely, users simply press the brake lever for temporarily moving the toothlike elements away from the lower jaw, thereby urging the jaw upward and downward; however, the lower jaw and the brake lever are separately arranged, and a spring is captured by the brake lever for ensuring a resilience, which may result of the increasing of the manufacturing cost and the complicate concatenation of elements. Furthermore, the wrench needs to be used by pressing the brake lever for adjusting the space between the jaws, the position of the brake lever thus needs consideration; that is, if the brake lever is just arranged in an improper place, it would not be facilely touched by users, thus the wrench still lacks of convenience in use. 
         [0006]    Additionally, the upper and the lower jaws are also susceptible to wrench body with various shapes, for instance formed of square or circular configurations, and the jaws may not be in optimum fit therewith. In this manner, the wrench can not steadily clamp objects and hence wasting time in operation. 
       SUMMARY OF THE INVENTION 
       [0007]    With regard to the above problems, the object of the present invention is to provide a jaw pipe wrench with resilient member which facilitates to increase the convenience of using, and reduce a complicate concatenation of elements and the manufacturing time and cost, thus increasing the competition of products. 
         [0008]    The jaw pipe wrench in accordance with the present invention mainly comprises a wrench body, a handle, an actuating jaw, and a pivotal jaw; wherein, the body and the actuating jaw have respective serrated sections which can fit with each other so as to ensure a good clamping stability while the two jaws grip the object. Particularly, a resilient member disposed within the actuating jaw provides with one flat surface propped against the wrench body; while propelling the actuating jaw, the resilient member is simultaneously compressed to render the wrench body moving away from the jaw, whereby users can facilely raise or descend the actuating jaw by one hand for adjusting the space between the actuating jaw and the pivotal jaw, thus increasing the convenience of using. Further, the resilient member does not need a complicate combination, thereby saving the manufacturing time and cost. 
         [0009]    Moreover, the third serrated section of the actuating jaw formed of an arcuate contour mainly comprises a respective first auxiliary surface at both sides thereof, and each faces to a second auxiliary surface of the jaw portion. In use, the object formed of the circular or polygonal shape readily fits with the third arcuate serrated section and is subsequently firmly clamped between the two jaws by adjusting movements of the actuating jaw, so as to decrease the problem of loosening. Consequently, the present invention also facilitates to adapt for various shapes of objects and increase the clamping capability. 
         [0010]    The advantages of the present invention over the known prior arts will become more apparent to those of ordinary skilled in the art by reading the following descriptions with the relating drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]      FIG. 1  is a perspective view showing a first preferred embodiment of the present invention; 
           [0012]      FIG. 2  is an exploded view showing the first preferred embodiment of the present invention; 
           [0013]      FIG. 3  is an exploded view showing the first preferred embodiment of the present invention; 
           [0014]      FIG. 4  is a schematic view showing the first preferred embodiment in time of manipulation; 
           [0015]      FIG. 5  is a schematic view showing the first preferred embodiment in time of manipulation; 
           [0016]      FIG. 6  is a partial enlarged view showing the resilient member of the present invention; 
           [0017]      FIG. 7  is an exploded view showing a second preferred embodiment of the present invention; 
           [0018]      FIG. 8  is a perspective view showing the concatenation of elements disclosed in  FIG. 7 ; 
           [0019]      FIG. 9  is a schematic view showing the second preferred embodiment in time of operation; and 
           [0020]      FIG. 10  is a schematic view showing the second preferred embodiment in time of operation. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0021]    Referring to  FIG. 1 and 2 , a first preferred embodiment of the present invention comprises a wrench body  10 , a pivotal jaw  20  pivoted to a top end of the wrench body  10 , an actuating jaw  30  disposed on the wrench body  10 , and a handle  40  engaged to a distal end of the wrench body  10 , opposite to the pivotal jaw  20 ; wherein, the wrench body  10  includes a first bore  11  disposed at the top end thereof and a first serrated section  12  disposed at one side thereof; further, the pivotal jaw  20 , which can be formed in an arcuate shape, comprises a second bore  21  disposed at a distal end thereof and a third serrated section  22  disposed opposite to the second bore  21 ; wherein the second bore  21  is in contact with the first bore  11  so as to firmly fasten the pivotal jaw  20  to the wrench body  10  by screwing a first pivot pin  50  through the two bores  21 - 11 . The first pivot pin  50  here is adopted in a cooperation of male and female screws. 
         [0022]    Still further, referring to  FIG. 3 , the actuating jaw  30  provides with an opening  31  arranged thereon for the wrench body  10  to penetrate therein, a first trough  32  disposed at one side thereof and transversely contacting with the opening  31 , an insertion  33  put into the first trough  32 , and a resilient member  34  disposed within the actuating jaw  30 ; wherein, the insertion  33  has a second serrated section  331  arranged at one side thereof, and the resilient member  34  mounted inside the actuating jaw  30  and propped against the wrench body  10 , so as to propel the first serrated section  12  of the wrench body  10  fit with the second serrated section  331 . That is, the first serrated section  12  is separated from the second serrated section  331  under a force F imparted thereto, which further results of the actuating jaw  30  sliding on the wrench body  10 ; in contract, the actuating jaw  30  is back to its original position while pausing the force F for in turn engaging the second serrated section  331  and the first serrated section  12 . 
         [0023]    Moreover, the resilient member  34  (as shown in  FIG. 6 ) can provide with a curved portion  341 , a protrusion  342 , a first flat surface  343 , and a second flat surface  344 ; wherein, the two flat surfaces  343 - 344  intersect to configure in a “&lt;” shape, and the curved portion  341  and the protrusion  342  respectively connects to the first flat surface  343  and the second flat surface  344 . Further, the resilient member  34  can also be a spring or other proper materials with springiness, and the first serrated section  12  and the second serrated section  331  are adopted to be inclined toward single orientation. The single orientation of the two serrated sections  12 - 331  can efficiently resist the downward movement of the actuating jaw  30  while gripping and further rotating the object, thereby not only making the two serrated sections  12 - 331  well fit with each other but also increasing the loading capability. 
         [0024]    Continuing with the aforementioned, referring to  FIGS. 2 and 3 , the actuating jaw  30  has a second trough  35  arranged on a top end thereof for a jaw portion  36  to be inserted in and a third bore  351  disposed on both sides of the second trough  35 , and the jaw portion  36  includes a fourth serrated surface  361  defined thereon to face the third serrated surface  22  of the pivotal jaw  22  and a fourth bore  362  arranged on both sides thereof. The third bore  351  can contact with the forth bore  362  and a second pivot pin  51  is screwed therethrough so as to fasten the jaw portion  36  into the second trough  35 . In this manner, a certain amount of friction occurs between the third and fourth serrated sections  361 - 22  and prevents the object from being facilely loosened in operation, thus efficiently and steadily grip the object therebetween. Additionally, the first trough  32  has a fifth bore  321  defined on both sides thereof, and the insertion  33  also includes a sixth bore  332  disposed on both sides thereof; a third pivot pin  52  would be screwed through both the bores  321 - 332  thereby securing the insertion  33  into the first trough  32 . Both the second pivot pin  51  and the third pivot  52  pin are presented as C-ring shapes in the preferred embodiment of the present invention. 
         [0025]    Referring to  FIGS. 4 and 6 , the pivotal jaw  20  has a third trough  23  defined adjacent the second bore  21  (not labeled in  FIG. 4 ), where a spring  24  is mounted for ensuring a substantial clamping in manipulation; the actuating jaw  30  further includes respective concavity  37  and flute  38  defined therein, and the flute  38  is in contact with the opening  31 . In a concatenation of the elements, the curved portion  341  of the resilient member  34  is arranged to insert into the concavity  37  and the protrusion  342  thereof is propped against a top end of the flute  38 . Additionally, the resilient member  34  with its second flat surface  344  leans against the wrench body  10  since the body  10  penetrates through opening  31 , which results in that the first serrated section  12  of the wrench body  10  well fits with the second serrated section  331  of the insertion  33  (as shown in  FIG. 4 ). Further referring to  FIG. 5 , while in manipulation, users merely hold the handle  40  by one hand and push or pull the actuating jaw  30  by their thumbs, simultaneously the resilient member  34  become compressed by the wrench body  10 , so that the second flat surface  344  is lengthened to render the protrusion  38  downwardly slipping along the flute  38 , and the curved portion  341  still interposes in the concavity  37 . Thus, the first serrated section  12  deviates from the second serrated section  331 , and further the actuating jaw  30  can freely move upwardly or downwardly for adjusting the space between the actuating jaw  30  and the pivotal jaw  20 . Subsequently, while stopping the driving the actuating jaw  30 , the protrusion  342  springs back to the former position and propels the body  10 , thereby reversely making the first serrated section  12  contact with the second serrated section  331 . 
         [0026]    Referring to  FIGS. 7 and 8 , a second preferred embodiment of the present invention includes the elements and operations similar to the first embodiment. Particularly, the pivotal jaw  20 ′ has a third serrated section  22 ′ formed of an arcuate shape and comprises a respective first auxiliary surface  221  at both sides of the third serrated section  22 ′; further the jaw portion  36 ′ also has a second auxiliary surface  3611  respectively arranged beside the fourth serrated section  361 ′; wherein, a socket  322  is arranged on the actuating jaw  30 ′ and communicates with the second trough  35  (not labeled in this figure), by which a supporting portion  363  protruded from the underside of the jaw portion  36 ′ leans against the socket  322  while inserting the jaw portion  36 ′ into the second trough  35 . Therefore, the supporting portion  363  with longer length enlarges the loading area and reduces the stress concentrated on the fourth serrated section  361 ′. While in use, the object formed with a circular contour (shown in  FIG. 9 ) or with a polygonal shape (shown in  FIG. 10 ) can be firmly and steadily gripped between the pivotal jaw  20 ′ and the actuating jaw  30 ′, thus strengthening the clamping capability. 
         [0027]    To sum up, the present invention takes advantages of the resilient member mounted within the actuating jaw and having one flat surface propped against the wrench body, so as to promote the serrated section of the wrench body to contact with the serrated section of actuating jaw while not in use or move away therefrom for adjusting the space between the two jaws, thus increasing the convenience of using. Additionally, the resilient member mounted inside the actuating jaw also decreases the complicate concatenation of elements and the manufacturing time and cost as well. 
         [0028]    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.