Pipe wrench

A pipe wrench, including:

• a first lever member, including a first grip portion, a first clamping portion and a body portion which is connected to and between the first grip portion and the first clamping portion, the body portion having at least one guide toothed groove;
• a pivot, positionably and slidably disposed within the at least one guide toothed groove, the pivot being slidable along an axial direction to be on a locked position or a released position, the pivot having at least one position-restricting toothed portion on a side radially opposite to and facing the at least one guide toothed groove and at least one elastic mechanism on the side radially opposite to and facing the at least one guide toothed groove, each of the at least one elastic mechanism being axially aligned with one of the at least one position-restricting toothed portion in the axial direction;
• a second lever member, including a second grip portion, a pivot hole and a second clamping portion, the pivot being disposed through and pivoted to the pivot hole, through the second lever member sliding or swinging relative to the first lever member, the first clamping portion being slidable relative to the second clamping portion;
• wherein when the pivot is on the locked position, the position-restricting toothed portion and the guide toothed groove are meshed with each other, and the elastic mechanism is located out of the guide toothed groove;
• when the pivot moves to the released position, the position-restricting toothed portion and the guide toothed groove are detached from each other, and the elastic mechanism is radially overlapped with and releasably engaged within the guide toothed groove.