Abstract: A hand-held, ratchet action tool closes together a pair of jaws. A first jaw is fixed in position. A second jaw includes a plurality of ratchet teeth and is mounted to pivot with respect to the first jaw. The ratchet tool further includes a linkage of four links operatively coupled together and with a motorized drive mechanism. A first pawl is supported on one of the links so as to be engageable with the teeth of the second jaw. The linkage is configured to convert drive motion from the drive mechanism into oscillatory motion of the pawl along the teeth. The first pawl is arranged to drive the working face of the second jaw towards that of the first jaw during the oscillatory motion. A second pawl engages with the teeth to permit the first pawl to be ratcheted back and forth, closing the second jaw on the first jaw. A selector lever is provided to manually disengage the pawls and to permit reopening of the jaws.

Abstract: A hand operated ratchet tool includes first and second pivotally coupled jaws, first and second links pivotally coupled to the first and second jaws, respectively, a third link pivotally coupled in common with the first and second links, and first and second handles pivotally coupled with the first and third links, respectively, and with one another. First and second pawls are mounted on the pivots between the third link and second handle and between the first link and first handle, respectively. Each alternately engage with teeth provided along a semi-circular edge of the second link to rotate the second link in a direction which closes the adjoining working faces of the jaws. The first pawl has two separate sets of teeth configured to respectively engage with the link teeth when the second link is being rotated in either of two opposing directions to open and close the jaws.

Abstract: A crimping tool according to the present invention has a head pivotally coupled with a pair of elongated handles. The head includes a pair of jaw members, mounted on separate pivots between a pair of jaw links, with opposing first and second planar crimping surfaces which, when brought together, abut and form sides of an included angle. A movable die member having a relatively elongated third planar crimping surface lies between the jaws and the first and second crimping surfaces to define with those surfaces a triangular crimping nest. The movable die member is adjustably mounted to the pair of jaw links for continuously adjustable positioning of the third crimping surface with respect to the first and second crimping surfaces and continuous adjustment of crimp nest size.

Abstract: A hand-held ratchet tool for moving a pair of jaw members toward and away from each other. The tool comprises a first and second elongated handle, each having a first end and a second end. The second end of the first handle is pivotally connected to the second end of the second handle. The tool further comprises a first jaw member pivotally mounted on the second end of the first handle and an elongate linkage having a first end pivotally mounted on the second end of the second handle and having a second end. The second end of the linkage, the first jaw member and a second jaw member are all pivotally connected along a common pivot axis. The second jaw member includes a plurality of ratchet teeth for receiving a pawl. A pawl is pivotally mounted on the second end of the second handle along the same axis as the pivotal connection between the elongate linkage and the second handle.