Patent ID: 6082231
Filing Date: 2000-07-04
Classification: B25B

Abstract:
A pair of pliers for gripping an outer surface of a pipe and comprising:a) a body including a fixed handle portion, a fixed jaw portion having a first concavely curved surface with first jaw teeth thereon, an extension portion and a pivot portion located between the fixed handle portion and the fixed jaw portion;b) a movable jaw pivotally attached to the pivot portion of the body so as to pivot about a pivot bolt extending through the pivot portion and the movable jaw, the movable jaw having a second concavely curved surface with second jaw teeth thereon facing toward the first jaw teeth, and a convexly curved rack portion having teeth thereon;c) a movable handle pivotally connected to the extension of the body so as to pivot relative to the body about a pivot axis, the movable handle having a stop portion;d) a pull element having a first end connected to the movable jaw at a location spaced from the pivot bolt and a second end engaging the movable handle;e) a push block mounted on the movable handle at a location spaced from the pivot axis, the push block having an end push portion configured and located so as to engage the curved rack portion of the movable jaw when the movable handle is moved toward the fixed handle thereby moving the second jaw teeth of the movable jaw toward first jaw teeth of the fixed jaw; and,f) a movable handle biasing spring acting on the movable handle to bias the movable handle away from the fixed handle such that the stop portion of the movable handle engages the second end of the pull element to thereby move the movable jaw away from the fixed jaw.