Patent Publication Number: US-6336387-B1

Title: Plier device having an easily assembling structure

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a plier device, and more particularly to a plier device including a plier member that may be easily assembled and secured to the handle member. 
     2. Description of the Prior Art 
     FIG. 1 shows a typical plier device including a handle member having two handles  80  pivotally secured at one end with a pivot shaft  81 , and a plier member having two jaws  83  pivotally secured together at the middle portion  84  thereof and each having a groove  86  formed in one end thereof and facing toward the handles  80  for engaging onto the handles  80  with fasteners  82  or the like. The grooves  86  of the jaws  83  are facing toward the handles  80  such that the jaws  83  may be easily disengaged from the handles  80 , and such that the jaws  83  are required to be secured onto the handles  80  with additional fasteners and/or additional tools. 
     The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional plier devices. 
     SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide a plier device including a plier member that may be easily assembled and secured to a handle member without additional tool members. 
     In accordance with one aspect of the invention, there is provided a plier device comprising a pair of handle levers including a middle portion pivotally secured together with a pivot shaft and each including a first end having a handle provided thereon and each including a second end having a stem provided thereon, a pair of jaws including a middle portion pivotally secured together with a pivot axle and each including a first end having a bar extended therefrom, and means for biasing the bars to engage with the stems and to secure the jaws to the handle levers without additional fasteners. The bars of the jaws may thus be easily and quickly biased and forced to engage with and to be secured to the stems of the handle levers without additional fasteners or tools. The plier device may thus includes two or more jaws or plier tool members changeably secured to the handle levers for allowing the tool members to be easily changed with each other. 
     The stems each includes a rod secured therein, the bars each includes a groove formed therein for receiving the rods of the stems. The grooves of the bars are facing away from each other. 
     The stems each includes a channel formed therein, the rods are extended through the channels of the stems respectively. 
     Further objectives and advantages of the present invention will become apparent from a careful reading of a detailed description provided hereinbelow, with appropriate reference to accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is an exploded view of a typical plier device; 
     FIG. 2 is an exploded view of a plier device in accordance with the present invention; 
     FIG. 3 is a perspective view of the plier device; and 
     FIG. 4 is an exploded and plane view illustrating the assembling of the plier device. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to the drawings, and initially to FIGS. 2 and 3, a plier device in accordance with the present invention comprises a plier member  11  and a handle member  12  manufactured separately and to be assembled together. The handle member  12  includes two handle levers  13  pivotally secured together at the middle portion thereof with a pivot shaft  14 , and each having a handle  15  formed or provided on one end thereof and each having a stem  16  formed or provided on the other end thereof. The stems  16  of the handle member  12  each includes a channel  22 ,  23  formed therein, and a rod  24 ,  25  secured therein and extended through the channel  22 ,  23  respectively. 
     The plier member includes two jaws  17  pivotally secured together at the middle portion thereof with a pivot axle  19  and each having a bar  18  extended from the other end opposite to the jaws  17 . The bars  18  of the jaws  17  each includes a groove  20 ,  21  formed therein and facing away from each other for receiving the rods  24  of the handle member  12  respectively. The bars  18  of the jaws  17  each includes an orifice  27  formed therein for receiving a spring member  30  which is engaged between the bars  18  of the jaws  17  for biasing the bars  18  away from each other and thus for biasing the jaws  17  toward each other relatively. 
     In operation or in assembling the plier device, as shown in FIG. 4, the bars  18  may be forced toward each other against the spring member  30 , for allowing the bars  18  to be engaged into the space formed between the stems  16  of the handle member  12  when the levers  13  or the handles  15  are moved away from each other. The rods  24 ,  25  may thus be easily engaged into the grooves  20 ,  21  of the bars  18 , and the spring member  30  may bias the bars  18  of the jaws  17  to engage with the rods  24 ,  25  such that the plier member  11  may be easily and quickly assembled onto the handle member  12  without additional fasteners or tools. The plier device may includes two or more plier members  11  that may be changeably secured to the handle member  12  and that may be easily changed with each other. 
     Accordingly, the plier device in accordance with the present invention includes a plier member that may be easily assembled and secured to a handle member without additional tool members. 
     Although this invention has been described with a certain degree of particularity, it is to be understood that the present disclosure has been made by way of example only and that numerous changes in the detailed construction and the combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as hereinafter claimed.