Abstract: A multi-function pipe cutting and fitting tool includes a spring biased connecting rod, a pair of plier teeth and a pair of friction teeth. The spring biased connecting rod improves the pipe cutting function of the tool by improving the operation of a movable jaw toward engagement of a fixed jaw. The pair of plier teeth positioned on one side of the tool allows a user to firmly grip a pipe or other object to be held in place. The pair of friction teeth positioned on an opposite side of the tool allows a user to more reliably engage an object such as a cap on a can of glue. The inclusion of all of these features in the same tool allows a user to perform multiple functions easily and more rapidly.

Abstract: A hand tool that is self-adjusting by alternately squeezing and relaxing the hand grip on the two handles, and that has substantially parallel jaws during closing adjustment. In one embodiment, the jaws have opposing gripping surfaces. In another embodiment, the jaws have opposing cutting blades. All of the operations, except the resetting of the adjustable jaw to a wide open position, can be accomplished with just one hand holding the tool.

Abstract: A hand tool that is self-adjusting by alternately squeezing and relaxing the hand grip on the two handles; that has substantially parallel jaws during closing adjustment; that actually grips the work object with at least an 8-to-1 compound gripping leverage; and that can be locked onto an object when desired with a selectively light or strong grip. All of the operations, except the resetting the adjustable jaw to a wide open position, can be done with just the hand holding the tool and it can be made in the form of an adjustable plier, an adjustable wrench, or an adjustable pipe wrench, plus many other applications.

Abstract: A pair of pliers has a driving handle, a fixed handle, a block plate, a U-shaped spring, a first torsion spring, and a second torsion spring. The driving handle couples with the fixed handle pivotally. The first torsion spring and the second torsion spring are connected to the driving handle and the fixed handle. The U-shaped spring is connected to the driving handle and the fixed handle.

Abstract: A hand tool that is automatically self-adjusting by alternately squeezing and relaxing the hand grid on the two handles; that has constantly parallel jaws at any adjustment; that actually grips the work object with at least an 8-to-1 compound gripping leverage; and that can be locked onto an object when desired with a selectively light or strong grip. All of the operations, except the resetting the adjustable jaw to a wide open position, can be done with just the hand holding the tool and it can be made in the form of an adjustable plier, an adjustable wrench, or an adjustable pipe wrench, plus many other applications.

Abstract: This invention relates to hand tools in general, and more particularly to a gripping plier or wrench having compound leverage gripping power not found in the tools most commonly sold and used today. This tool further has constantly parallel jaws at any adjustment position within its capacity. When constructed as a plier, it grips the workpiece with better than a 10:1 leverage ratio which makes it practically impossible to slip without the operator releasing its grip. When constructed as a wrench for turning nuts, bolts, and fittings, its gripping power holds the workpiece so tightly that there is no possibility of rounding off the corners or otherwise damaging it during the turning operation. Additionally, if a hexagonal object has been previously damaged and has rounded off corners, the wrench version of this tool, in any of its configurations, can effectively grip and turn such an object, a feat that the most commonly used open-end, box-end, or adjustable wrenches cannot perform to any satisfactory degree.