Abstract: A hand tool is disclosed that includes a first handle that provides at one end a first hinge joint extending in a first direction and a hollow tube extending in the other direction. A fixed work element is attached at a distal end of the tube. A second handle is aligned with the first handle and provides a second hinge joint that extends in rotational engagement with the first hinge joint and includes a first set of gear teeth facing the tube. A hinge pin is pivotally engaged with and aligns the first and second hinge joints. As such, the second handle is rotatable toward and away from the first handle about the pin. A transfer rod is rotatably held within the hollow tube and extends therethrough to a movable work element that is positioned adjacent to the fixed work element. A toothed gear segment is fixed to the transfer rod and includes a second set of gear teeth that engages the first set of gear teeth.

Abstract: A hand tool having a first handle with a front end and a blade end including a hollow frame and a sliding jaw both mounted on the front end thereof. The handle also has a core pin and a regulating screw rotatably mounted on the core pin, both located within the hollow frame. A second handle has a front end and a fixed jaw located at the front end thereof. A pivotal joint pin pivotally connects the first and second handles together with said jaws generally facing each other so that the handles are movable between an open and closed position, and the hand tool is usable as pliers. Locking means lock the handles in the closed position, so that the hollow frame is usable as a hammer head. Also, in the locked position, the sliding jaw is operatively connected to the regulating screw so that rotation of the regulating screw moves the sliding jaw with respect to the fixed jaw, whereby the hand tool is usable as a monkey wrench in the closed position.

Abstract: A sliding joint pliers having a fulcrum pin projecting from one of its limbs and displaceably arranged in a slot in the second of its limbs, has an adjusting screw rotatably mounted on a carrying plate disposed between the limbs. The second limb has a rack along one edge for coaction with the adjusting screw so that the fulcrum pin can be set in a desired position in the slot. The carrying plate is non-rotatably positioned on the fulcrum pin and, together with the second limb and fulcrum pin, is pivotable in relation to the first limb.