Abstract: A method of forming a number of sizes of hollow shaft nutdrivers from a common size metal tube workpiece. The method comprises three steps to form a hex drive socket on one end of a metal tube workpiece, and a fourth step to form a plurality of raised wings on the other end of the metal tube workpiece for retaining the other end of the then finished nutdriver in a handle.
Abstract: An adaptor and driver unit for rotatably inserting threaded anchors into a seating position in drilled holes in rock, masonry, concrete and the like, comprising a driver with a threaded hole on the lower end into which the upper end of a threaded anchor is releasably mounted, and an adaptor releasably attached to the upper end of the driver and being adapted to be connected to a power drive means.
Abstract: A gripping screw drive bit for use with conventional drive sockets which utilize non-magnetic means for gripping and retaining Robertson, TORX, and hexagonal screws and bolts. The gripping bit comprises two mating members. The gripping action is provided by the misalignment of the two members of a composite gripping bit, within a screw head recess, when a minimal amount of torque is exerted upon the composite gripping bit by a drive socket.
Abstract: A driver for a construction reinforcement bar for rotatably inserting the bar into a seating position in a drilled hole in rock, masonry, concrete and the like, comprising a body having a plurality of eccentrically mounted cam rollers which are adapted to be pivoted into a gripping engagement with a reinforcement bar when the driver is rotated in one direction and to be released from the bar and moved back into a retracted position when the driver is rotated in the other direction.