Abstract: The invention provides for an improved screw and screwdriver. The self-locking screw and screwdriver, the JacLock™ Screw and JacLock™ Screwdriver, is designed to improve insertion and/or removal of a screw. The new screw head differs from normal horizontal cut/slotted screw heads and cross cut/slotted screw heads. The invention calls for a standard vertical cut/slot in the screw head along with two cross cuts/slots in the head of the screw equi-distant from the center of the horizontal standard slot. The screwdriver has a redesigned head that will fit into the three cuts/slots in the new screw. Once the screwdriver is inserted into the screw head it will lock in place making it easier to insert or remove the screw. The design results in improved torque and eliminates the possibility of the screwdriver slipping off the head of the screw and possibly damaging the head of the screw.

Abstract: Construction systems and methods are described for building structures including homes that can withstand vibration and earth movement caused by earthquakes. The construction system uses about 8-inch corrugated round steel pipes to create floor framing, wall framing, and ceiling framing that is resistant to destruction caused by earth movement and vibrations. The floor framing and wall framing can be connected together at right angles and supported by a foundation that features wood pilings with concrete caps. The plurality of pipes of the floor framing, wall framing, and ceiling framing can be connected together by welding, screws, or other fasteners to assemble the structure. Finished floor, material, and ceiling materials can be fastened to the frames to complete the structure.

Abstract: A tool driver and fastener that prevents the driver from lifting up off the fastener. The fastener has at least one undercut slot that matches with a blade on the driver to prevent uplift. The driving tool and fastener mate with one another and have respective cross-sectional configurations that can interlock temporarily for allowing a screw or a bolt with a slot or head with a plurality of sides to be driven into or removed from a work place without movement of the driver up off of the fastener. The driver may be a screw driver or wrench with a blade in a plane transversed to the longitudinal axis of rotation of the driver. The fastener may include a main slot in one plane containing the center line of the fastener and a second slot transverse to the first slot and perpendicular to the first slot.