Abstract: A trailer hitch adapted for attachment to a lunette coupler or a ball coupler comprises a pintle hook and a ball mounted on the hook and adapted to receive a ball coupler, and a closure pivotally mounted on the hook and pivotable between a closed position in engagement with the ball and an open position spaced from the ball.

Abstract: A chainsaw attachment for indicating a sawing point on a workpiece, having a support having at least two arms with grip portions clampable to the chain guide bar of the chainsaw for holding a rule substantially perpendicular to the plane of sawing with the end of the rule opposite a reference point on the workpiece. The support shown comprises two independently formed arms positioned on opposite sides of the chain guide bar, connected by a threaded connector and arranged to pivot about a fulcrum to tightly engage the chain guide bar. Each arm shown has a hole in one end slightly larger than the rule, a grip portion on the other end, and a fulcrum region between the hole end and the grip portion so arranged that when the threaded connector is tightened, the fulcrum regions bear against one another, the grip portions are drawn together to clamp the support to the guide bar, and the hole ends are forced apart causing the hole perimeters to bind against and hold a rod-form rule firmly in a selected position.

Abstract: An impact tool capable of use in place of a conventional jackhammer, the tool being of the type having an axially moving impact member guided telescopically by a mating guide member, and characterized by the following combination:(a) the impact member is a massive elongated rod, having a length of the order of two feet or greater, a diameter of the order of one inch or greater, and comprised of impact-resistant heavy material such as steel to have a weight of the order of 10 pounds;(b) the guide member is a rigid hollow outer sleeve, having a slidable fit over the massive rod and having a lower end formation of internal shape corresponding to the external shape of the shank of a jackhammer tool bit;(c) a restraint means retains the jackhammer tool bit with its shank inserted into the lower end formation of the guide; and(d) the massive rod and the guide member are cooperatively dimensioned so that the massive rod protrudes to enable a worker to alternately retract the massive rod and propel it against the end