Abstract:
A socket wrench includes a head with two engaging rods respectively extending from two sides of the head. Each engaging rod has a disk connected thereto and a spring is connected between the two disks. A release pin extends through the two engaging rods and has two notches for respectively receiving two balls embedded in the two engaging rods. A pawl member is pivotally received in the head and engaged with either one of the two disks. The two engaging rods are connected to two sockets with different sizes.

Description:
FIELD OF THE INVENTION 
     The present invention relates to a socket wrench having two engaging rods which extend from two opposite sides of the head of the wrench and a release pin extending through the two engaging rods so that the wrench employs two sets of sockets with different sizes. 
     BACKGROUND OF THE INVENTION 
     A conventional socket wrench generally includes a head connected to a handle and an engaging rod extends from a side of the head. The engaging rod has a ball embedded in a side thereof so that a socket is securely connected to the engaging rod. A release pin is movably inserted into the engaging rod and has a notch in an outside thereof so that when pushing the release pin to a release position, the ball is received in the notch in the release pin and the force urging the socket disappears so that the socket can be removed from the engaging rod. By operating the release pin, the user may put different sockets on the engaging rod. The engaging rod may have a toothed outer periphery which is engaged with a pawl member in the head of the wrench so that the wrench becomes a ratchet tool. Each socket has an engaging hole for receiving the engaging rod and the size of the engaging hole has many sizes. Therefore, the socket wrench has a fixed engaging rod which can only be cooperated with the sockets having the engaging hole with a fixed size. 
     The present invention intends to provide a socket wrench that has two engaging rods and a release pin extends through the two engaging rods so that two sets of sockets can be used on the socket wrench. 
     SUMMARY OF THE INVENTION 
     In accordance with one aspect of the present invention, there is provided a wrench socket and comprising a head and a chamber defined in the head. A first engaging rod and a second engaging rod respectively extend through two sides of the head. A first toothed disk is connected to the first engaging rod and a second toothed disk is connected to the second engaging rod. A spring is connected between the first toothed disk and the second toothed disk. A pawl member is pivotally received in the chamber and engaged with the first toothed disk and the second toothed disk. A first ball is movably engaged with a side of the first engaging rod and a second ball is movably engaged with a side of the second engaging rod. A release pin movably inserted through the first engaging rod and the second engaging rod. The release pin has a first notch and a second notch for respectively receiving the first ball and the second ball. 
     The primary object of the present invention is to provide a socket wrench that can employ two different sets of sockets on two engaging rods respectively extending from two sides of the head of the wrench. 
     These and further objects, features and advantages of 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, several embodiments in accordance with the present invention. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view to show a socket wrench of the present invention; 
     FIG. 2 is a cross-sectional view to show the socket wrench of the present invention; 
     FIG. 3 is a cross-sectional view to show a ball in the lower engaging rod is received in a notch of a release pin when pushing an upper engaging rod; 
     FIG. 4 is a cross-sectional view to show a ball in the upper engaging rod is received in the other notch of the release pin when pushing the lower engaging rod; 
     FIG. 5 is a cross-sectional view to show another embodiment of the socket wrench of the present invention; 
     FIG. 6 is a cross-sectional view to show yet another embodiment of the socket wrench of the present invention, and 
     FIG. 7 is a cross-sectional view to show a further embodiment of the socket wrench of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to FIGS. 1 and 2, the socket wrench of the present invention comprises a head  100  connected to a handle  1  and a chamber  10  is defined in the head  100 . Two plates  6  are respectively connected to two sides of the head  100  and close the chamber  10 . Each plate  6  has a first hole  60  defined therethrough and one of the two plates  6  further has a second hole  600 . A first engaging rod  21  and a second engaging rod  21 ′ respectively extend through the two first holes  60  in the two plates  6 . The first engaging rod  21  has a hole  210  defined through a side thereof for movably receiving a first ball  29  therein, and a hole  210 ′ is defined through a side of the second engaging rod  21 ′ for movably receiving a second ball  29 ′ therein. A first toothed disk  20  is connected to the first engaging rod  21  and a second toothed disk  20 ′ is connected to the second engaging rod  21 ′. The first toothed disk  20  has a first recess  220  defined in an side opposite to the first engaging rod  21  and the second toothed disk  20 ′ has a second recess  220 ′ defined in an side opposite to the second engaging rod  21 ′. A spring  3  is engaged between the first recess  220  and the second recess  220 ′. A first passage  22  is defined through the first engaging rod  21  and the first toothed disk  20 , and a second passage  22 ′ is defined through the second engaging rod  21 ′ and the second toothed disk  20 ′. A release pin  4  is movably inserted in the first passage  22  and the second passage  22 ′. The release pin  4  has a first notch  40  and a second notch  40 ′ for respectively receiving the first ball  29  and the second ball  29 ′. 
     A frame  5  is pivotally received in the chamber  10  and has a first flange  51  and a second flange  50  extending in parallel therefrom. The first flange  51  has a slot  512  and the second flange  50  has a split plate  513 . An aperture  514  is defined in the frame  5  and located between the first flange  51  and the second flange  50 . A tubular member  517  is received in the aperture  514  and biased by a spring  30  in the aperture  514 . A lever  510  is connected to the frame  5  and the lever  510  extends through the second hole  600  in the plate  6 . The split plate  513  urges against a bottom side of the plate  6  as shown and an inclined surface  515  is defined in an end so as to conveniently install the frame  5  in the chamber  10 . A pawl member  50  is pivotally received between the first flange  51  and the second flange  50 . The pawl member  50  has a protrusion  504  on a side thereof and the protrusion  504  is movably received in the slot  512  in the first flange  51 . A ridge  503  extends from an end of the pawl member  50  and the tubular member  517  is engaged with a side of the ridge  503 . The pawl member  50  has a curved toothed surface  505  which is engaged with the first toothed disk  20  and the second toothed disk  20 ′. 
     A socket  7  is mounted to the first engaging rod  21  and is securely positioned by the first ball  29  urging the socket  7  and the first ball  29  is pushed by the release pin  4 . As shown in FIG. 3, when a user pushes the second engaging rod  21 ′ toward the first engaging rod  21 , the second engaging rod  21 ′ and the pin  4  are lowered as shown in the FIG.  3  and the first notch  40  is lowered to received the first ball  29  so that the socket  7  can be removed from the first engaging rod  21 . As shown in FIG. 4, a socket  7  mounted to the second engaging rod  21 ′ can also be separated from the second engaging rod  21 ′ by pushing the first engaging rod  21  and the release pin  4 . 
     FIG. 5 shows another embodiment of the socket wrench wherein the structure of the embodiment is the same as disclosure in FIGS. 1-4 except that the two disks respectively connected to the first engaging rod  21  and the second engaging rod  21 ′ are different from those shown in FIGS. 1-4. The first disk  20  is connected to the first engaging rod  21  and the second disk  20 ′ is connected to the second engaging rod  21 ′ wherein the second disk  20 ′ has a toothed outer periphery which is engaged with the pawl member  50 . A spring  3  is connected between the first disk  20  and the second disk  20 ′. A recess  221  is defined in a side of the second disk  20 ′ and located opposite to the second engaging rod  21 ′. The recess  221  in the second disk  20 ′ has a toothed inner periphery. The first disk  20  has a toothed outer periphery which is engaged with the toothed inner periphery of the second disk  20 ′. A release pin  4  movably extends through a first passage  22  in the first engaging rod  21  and a second passage  22 ′ in the second engaging rod  21 ′. The release pin  4  also has a first notch  40  and a second notch  40 ′ for respectively receiving the first ball  29  and the second ball  29 ′. 
     FIG. 6 shows yet another embodiment of the engagement of the first disk  20  and the second disk  20 ′. The first disk  20  has a polygonal outer periphery and the recess  221  in the second disk  20 ′ has a polygonal inner periphery which is engaged with the polygonal outer periphery of the first disk  20 . 
     FIG. 7 shows a further embodiment of the engagement of the first engaging rod  21  and the second disk  20 ′. There is no first disk and an end of the first engaging rod  21  has a polygonal cross section which is engaged with the polygonal inner periphery defined in the recess  221  in the second disk  20 ′. 
     While we have shown and described various embodiments 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 and spirit of the present invention.