Abstract A workpiece to which traction is to be applied is firmly held by a gripping device to which is anchored one end of a rectilinear guide having a free end directed away from the workpiece. An impact member of high inertia is slidably disposed on the guide for rapid movement toward an impacting engagement with an abutment carried by the guide adjacent its free end, whereby the resulting tensional forces in the form of a sudden impulse are transmitted through the gripping device to the workpiece for use, for instance, in withdrawing the workpiece from a member in which it is firmly anchored or embedded. The impulse applying means is combined with the gripping device in such a manner to avoid transmitting the impulses to the workpiece through the toggle linkage or other locking means which secures the jaws of the device in gripping engagement with the workpiece, whereby to avoid loosening of the jaws and/or damage to the said locking means.
A traction applying tool comprising in combination a stationary clamp member, including a jaw aNd a handle rigidly connected thereto, a movable jaw pivotally connected to said member for swinging movement toward and away from said first jaw for gripping an object between said jaws, and a toggle linkage extending between and pivotally connected to said handle and said movable jaw respectively at locations eccentric to the pivotal connection between said member and the movable jaw, for selectively locking said jaws in gripping engagement with a workpiece; in combination with a rectilinear guide having one end anchored to said stationary clamp member and the other end free, said free end being on the side of said handle remote from said toggle linkage, an abutment on said guide spaced from said one end, and an impact member freely slidable on said guide between said one end and said abutment for impacting engagement with said abutment to urge said jaws and said workpiece in a direction toward the free end of said guide, said one end of the guide being pivotally connected to said stationary clamp member for swinging movement relative thereto, about an axis parallel to the axis of said pivotal connection between the said member and the movable jaw.
Claim 2
Dependent Claim
209 words
A traction applying tool comprising in combination a stationary clamp member, including a jaw aNd a handle rigidly connected thereto, a movable jaw pivotally connected to said member for swinging movement toward and away from said first jaw for gripping an object between said jaws, and a toggle linkage extending between and pivotally connected to said handle and said movable jaw respectively at locations eccentric to the pivotal connection between said member and the movable jaw, for selectively locking said jaws in gripping engagement with a workpiece; in combination with a rectilinear guide having one end anchored to said stationary clamp member and the other end free, said free end being on the side of said handle remote from said toggle linkage, an abutment on said guide spaced from said one end, and an impact member freely slidable on said guide between said one end and said abutment for impacting engagement with said abutment to urge said jaws and said workpiece in a direction toward the free end of said guide, said one end of the guide being pivotally connected to said stationary clamp member for swinging movement relative thereto, about an axis parallel to the axis of said pivotal connection between the said member and the movable jaw.