Abstract: A straight edge bar clamp spreader comprises a straight edge bar, an inner channel portion, parallel channel portions, and two-way bosses or divots, a clamp, and a clamp-spreader. The inner channel portion is provided along an elongated central region of the bottom surface of the straight edge bar with a constant cross-section. The parallel channel portions are provided along two elongated parallel regions of the top surface of the straight edge bar. The two-way bosses or divots are provided across and on an inner surface of the inner channel portion of the bottom surface and an outer surface of the top surface and configured to define the predetermined stopping positions for two-way movements along the bottom surface or the top surface. The clamp is installed in the inner channel portion of the bottom surface. The clamp-spreader is installed in the pair of parallel channel portions of the top surface.

Abstract: A hand tool handle includes a main body, first and second installation holes, and a detachable tool holder. The main body has a side wall portion and first and second edge portions. The first installation hole is provided at the side wall portion, and the second installation hole is provided at the first edge portion. The first and second installation holes are provided with adjacent locating detents. The detachable tool holder has a latching portion and a tool insertion hole. The latching portion of the detachable tool holder is configured to be inserted and held in the first installation hole or the second installation hole, and the tool insertion hole is configured to receive an external tool. The main body may have substantially a shape of cylinder or faceted polygon cylinder.

Abstract: A straight edge bar clamp spreader comprises a straight edge bar, an inner channel portion, parallel channel portions, and two-way bosses or divots, a clamp, and a clamp-spreader. The inner channel portion is provided along an elongated central region of the bottom surface of the straight edge bar with a constant cross-section. The parallel channel portions are provided along two elongated parallel regions of the top surface of the straight edge bar. The two-way bosses or divots are provided across and on an inner surface of the inner channel portion of the bottom surface and an outer surface of the top surface and configured to define the predetermined stopping positions for two-way movements along the bottom surface or the top surface. The clamp is installed in the inner channel portion of the bottom surface. The clamp-spreader is installed in the pair of parallel channel portions of the top surface.

Abstract: A straight edge bar clamp comprises an elongated channeled bar, a threaded base, first and second movable jaw bodies, bosses or divots, a catching device, and a threaded shaft. The elongated channeled bar having an inner channel portion. The threaded base is installed fixedly in the elongated channeled bar. The first movable jaw body is installed movably and partially in the elongated channeled bar between the second movable jaw body and the end of the bar furthest from the threaded base. The bosses or divots are provided on an inner surface of the inner channel portion and configured to define the predetermined stopping positions of the first movable jaw body. The catching device is provided in the first movable jaw body. The second movable jaw body is installed partially in the elongated channeled base movably between the threaded base and the first movable jaw body along the elongated channeled bar.

Abstract: A straight edge bar clamp comprises an elongated channeled bar, a threaded base, first and second movable jaw bodies, bosses or divots, a catching device, and a threaded shaft. The elongated channeled bar having an inner channel portion. The threaded base is installed fixedly in the elongated channeled bar. The first movable jaw body is installed movably and partially in the elongated channeled bar between the second movable jaw body and the end of the bar furthest from the threaded base. The bosses or divots are provided on an inner surface of the inner channel portion and configured to define the predetermined stopping positions of the first movable jaw body. The catching device is provided in the first movable jaw body. The second movable jaw body is installed partially in the elongated channeled base movably between the threaded base and the first movable jaw body along the elongated channeled bar.

Abstract: A straight edge clamping device includes front and rear sections and first and second connection locks. The connection lock is configured to be fit into the connecting ends of the elongated hollow portions of the front and rear sections. The first and second connection locks fit into the connecting ends of the first and second elongated hollow portions of the front and rear sections so as to connect and lock the front section with the rear section securely. Each of the first and second connection locks comprises: an outer surface fitting substantially tightly to at least a part of inner surface of the elongated hollow portion and an inner groove recessed inward from the outer surface, so as to provide rigidity against bending, shearing, or straining force on the straight edge clamping device.

Abstract: A straight edge clamping device includes front and rear sections and first and second connection locks. The connection lock is configured to be fit into the connecting ends of the elongated hollow portions of the front and rear sections. The first and second connection locks fit into the connecting ends of the first and second elongated hollow portions of the front and rear sections so as to connect and lock the front section with the rear section securely. Each of the first and second connection locks comprises: an outer surface fitting substantially tightly to at least a part of inner surface of the elongated hollow portion and an inner groove recessed inward from the outer surface, so as to provide rigidity against bending, shearing, or straining force on the straight edge clamping device.

Abstract: A straight edge clamping device having an elongated hollow base and a clamping device for holding a workpiece on the base is provided. The base having a constant cross-section and comprises: a flat top portion; a flat bottom portion; and frictional bands disposed along the flat bottom portion of the base in a direction of length of the base. The frictional bands increase a friction against the workpiece so as to keep the straight edge clamping device from skidding on the workpiece. The straight edge clamping device may further comprise installing grooves for installing the plurality of frictional bands, and the installing grooves may be disposed on the flat bottom portion in a direction of length of the base. Each of the frictional bands may have a cross-sectional shape substantially same as a corresponding installing groove.

Abstract: An extrusion cross-section for a straight edge clamping device including (a) an elongated hollow base having a constant cross-section; (b) a first stop fixed at one end of the base; (c) a second stop movably provided along the base; and (d) a clamp for holding the workpieces together, includes a) a flat base portion having top and bottom surfaces, and two edges; b) two L-cross-sectioned portions having horizontal and vertical parts, facing each other, integrated with the flat base on the top surface of the flat base forming a top groove; c) two hollow portions, facing each other, integrated with the flat base on the bottom surface of the flat base forming a bottom groove; and d) two flanges having a horizontal part, vertical parts, facing each other, integrally connected to the corresponding hollow portion, wherein the cross-section has a right-left symmetry with a vertical center line as symmetry axis.

Abstract: An extrusion cross-section for a straight edge clamping device including (a) an elongated hollow base having a constant cross-section; (b) a first stop fixed at one end of the base; (c) a second stop movably provided along the base; and (d) a clamp for holding the workpieces together, includes a) a flat base portion having top and bottom surfaces, and two edges; b) two L-cross-sectioned portions having horizontal and vertical parts, facing each other, integrated with the flat base on the top surface of the flat base forming a top groove; c) two hollow portions, facing each other, integrated with the flat base on the bottom surface of the flat base forming a bottom groove; and d) two flanges having a horizontal part, vertical parts, facing each other, integrally connected to the corresponding hollow portion, wherein the cross-section has a right-left symmetry with a vertical center line as symmetry axis.