Patent ID: 6810775
Filing Date: 2004-11-02
Classification: B25B

Abstract:
A pair of pipe pliers comprising:a handle having an output end, a fixed jaw disposed at the output end, and an adjusting channel disposed in a region of the output end; a threaded nut disposed below the adjusting channel; a curved movable block having a movable jaw, and a toothed section extending from the adjusting channel and being threadably engaged with said threaded nut, wherein when said threaded nut is turned, said movable jaw is caused to move towards or away from said fixed jaw, said curved movable block being tiltable within the adjusting channel, so that an angle of inclination between said fixed jaw and said movable jaw is variable, said fixed jaw and said movable jaw being adapted to grip a work piece therebetween by pressing in opposite directions when said pair of pipe pliers is turned; and an auxiliary pressurizing mechanism that moves said curved movable block to drive said movable jaw and said fixed jaw relative to each other to increase a pressure against the work piece, and comprising an auxiliary handle, said auxiliary handle having two legs disposed at an angle to each other, being pivotally joined to said handle at a joint disposed in a region where said two legs are connected to each other, and having a slip joint disposed at an end of a shorter one of said two legs, by which said auxiliary handle is slidably joined to said curved movable block, said curved movable block having a channel formed therein for slidably receiving said slip joint, said auxiliary handle further having a return spring that is compressed when an operator squeezes a longer one of said two legs, and which returns said auxiliary handle to its original position when the operator releases said auxiliary handle.