Patent Publication Number: US-10322496-B2

Title: Open-end wrench

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention relates to wrenches and more particularly to an open-end wrench having a spring biased moveable jaw. 
     2. Description of Related Art 
     A conventional adjustable wrench comprises sockets arranged at two ends of a wrench body respectively; an adjustment screw bolt arranged on the wrench body; an adjustable wrench support matching with sockets separately arranged on two ends of the adjustment screw bolt; an adjustment threaded sleeve arranged between the adjustment wrench support and the adjustment screw bolt, wherein the adjustment threaded sleeve is screwed with a threaded wall of an inner wall of the wrench body; and an adjustable button fixed with the adjustment screw bolt arranged on the wrench body, wherein the adjustable button is between the sockets, wherein the adjustable wrench support is adapted to be adjustable with the adjustable button and the diameters of the sockets at two ends of the wrench body vary from each other. 
     While the adjustable wrench enjoys its success in the market, continuing improvements in the exploitation of wrench are constantly being sought. 
     SUMMARY OF THE INVENTION 
     It is therefore one object of the invention to provide an open-end wrench comprising a stationary jaw including first, second, and third sections on an interior surface, two angles on the interior surface, an inclined hole, a through hole adjacent to a first end of an interior surface and communicating with the inclined hole, and a hook at a forward end; a handle pivotably secured to a rear end of the stationary jaw; and a moveable jaw including first, second, and third sections on an interior surface; two angles on the interior surface; a hook at a forward end; a hollow cylinder extending from a rear portion to dispose in the inclined hole, the hollow cylinder having an elongated slot on a surface and communicating with an interior of the hollow cylinder, and internal threads at an open end of the hollow cylinder; a biasing member disposed in the hollow cylinder, a threaded fastener secured to the internal threads to urge against a first end of the biasing member; and a pin inserted through the through hole and the elongated slot to stop at a second end of the biasing member, the pin being configured to move in the elongated slot. 
     The above and other objects, features and advantages of the invention will become apparent from the following detailed description taken with the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an open-end wrench according to the invention; 
         FIG. 2  is an exploded view of  FIG. 1 ; 
         FIG. 3  is a longitudinal sectional view of  FIG. 1 ; 
         FIG. 4  is a side elevation of  FIG. 1  showing a movement of the moveable jaw relative to the stationary jaw; and 
         FIG. 5  is an environmental view of the open-end wrench working on a nut. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to  FIGS. 1 to 5 , an open-end wrench in accordance with the invention comprises the following components as discussed in detail below. 
     A stationary jaw  10  includes an inclined hole  11 , a through hole  12  communicating with the inclined hole  11  adjacent to one end of an interior surface, a hook  13  at a forward end  13 , and a channel  14  at a rear end. 
     A handle  30  includes a through hole  31  at a front end. A pin  70  is driven through the through hole  31  and the channel  14  to pivotably fasten the handle  30  and the stationary jaw  10  together. 
     A moveable jaw  20  includes a hook  22  at a forward end and a hollow cylinder  21  extending from a rear portion and having an elongated slot  211  communicating with the hollow cylinder  21 , and internal threads  212  at an open end of the hollow cylinder  21 . The hollow cylinder  21  is releasably disposed in the inclined hole  11 . A torsion spring  50  is disposed in the hollow cylinder  21 . A bolt  60  is secured to the internal threads  212  to urge against the other end of the torsion spring  50 . A pin  40  is inserted through the through hole  12  and the elongated slot  211  to engage one end of the torsion spring  50 . Thus, in use the mouth of the open-end wrench can be widely opened by pulling the moveable jaw  20  away from the stationary jaw  10  with the hollow cylinder  21  partially exposed, the torsion spring  50  compressed, and the pin  40  moved from one position of the elongated slot  211  to another position of the elongated slot  211  (see  FIG. 4 ). 
     The stationary jaw  10  has first, second, and third sections B of an interior surface; and two angles A on the interior surface. Likewise and corresponding to the stationary jaw  10 , the moveable jaw  20  has first, second, and third sections B of an interior surface; and two angles A on the interior surface. 
     While the invention has been described in terms of preferred embodiments, those skilled in the art will recognize that the invention can be practiced with modifications within the spirit and scope of the appended claims.