Abstract: A concrete bolt assembly comprises a bolt set and a spherical washer for the bolt set to penetrate. The bolt set includes a concrete bolt member and a spherical nut disposed on the concrete bolt member. The spherical nut has a first sphere and the spherical washer has a second sphere. With the arrangement of the first sphere and the second sphere, the concrete bolt assembly can be embedded in a building material from any inclined angle since the contact of the spherical nut and the spherical washer exerts a perpendicular force to densely tighten the concrete bolt assembly, prevent the embedded concrete bolt assembly from easily corning off or extracting front the building material after screwing, and enhance an engaging effect of the assembly.

Abstract: An expansible anchor assembly includes an expansion sleeve and an anchor bolt plugging and expanding the expansion sleeve. The expansion sleeve includes a first end, a second end, an expansible member adjacent to the second end that is divided into expansible segments by slits, and a bore defined in the expansion sleeve for communicating the first end with the second end. A groove is annularly formed on the expansion sleeve, and a distance from the groove to the second end equals to ¼˜? times a length of the expansion sleeve for preventing an over length of the slits, which is beneficial to the manufacture. During expansion, the expansible segments are completely expanded when the expansible member is subjected to a thrust from the anchor bolt to promote the anchoring force and avoid damaging a working wall.

Abstract: An expansible anchor assembly includes an expansion sleeve and an anchor bolt plugging and expanding the expansion sleeve. The expansion sleeve includes a first end, a second end, an expansible member adjacent to the second end that is divided into expansible segments by slits, and a bore defined in the expansion sleeve for communicating the first end with the second end. A groove is annularly formed on the expansion sleeve, and a distance from the groove to the second end equals to ¼˜? times a length of the expansion sleeve for preventing an over length of the slits, which is beneficial to the manufacture. During expansion, the expansible segments are completely expanded when the expansible member is subjected to a thrust from the anchor bolt to promote the anchoring force and avoid damaging a working wall.

Abstract: The present invention is in particular to a first threaded section and a second threaded section both consisted of a plurality of threads are spirally disposed on the shank and connecting each other. Moreover, said first threaded section is a continuous threaded section, and said second threaded section is a non-continuous threaded section. While in operation, with said first threaded screwing, the user can save more labor in screwing the present invention. Further accompanying with said non-continuous second threaded section, the debris cut from the object can be accumulated inside said second threaded section and connected together. Therefore, the present invention will be well fastened into the object after screwing.

Abstract: A screw with triple regions of shaft provides an optimal drilling/securing power as well as debris-containing capacity. To encompass the above opposing functions in a screw, the middle region is configured in two alternative ways: (1) Both the number of spiral threads per unit length and the outer diameter of spiral threads in the middle region are reduced to create more capacity for debris; and (2) Replace voluminous spiral threads with an equivalent space-saving securing structure of rhombic threads.

Abstract: An electroluminescent device includes one or more electroluminescent laminates attached onto a bottom surface of a base panel and one or more patterns attached onto an upper surface of the base panel. The patterns each may include two or more spaces having different material of different brightnesses to generate light of different brightness through the different materials when the electroluminescent laminate is energized. The patterns may include one or more outer peripheral spaces formed around the other inner peripheral surfaces, to generate light of different brightnesses.

Abstract: An electroluminescent device includes one or more electroluminescent laminates attached onto a bottom surface of a base panel and one or more patterns attached onto an upper surface of the base panel. The patterns each may include two or more spaces having different material of different brightnesses to generate light of different brightness through the different materials when the electroluminescent laminate is energized. The patterns may include one or more outer peripheral spaces formed around the other inner peripheral surfaces, to generate light of different brightnesses.

Abstract: A lightening device for a shoe having a receiving portion provided in the heel of the shoe body, the receiving portion is covered with an openable lid, a driving assembly is received in the receiving portion, a plurality of electro-luminescent pieces connecting with the driving assembly are provided in a transparent instep of the shoe. Thereby, the battery in the driving assembly can make the electro-luminescent pieces always lighten; a control circuit controls the effect of steady lightening or flashing of the electro-luminescent pieces. Particularly, when the battery is exhausted, a user can lift the lid to expose the driving assembly to change for a new battery, after that, the lightening device can be activated again to lighten when the lid is closed.

Abstract: A wedge anchor has a shank with an expander section having a surface that forms an angle greater than 8° with respect to an axis of the shank. A plurality of longitudinal ribs project radially and outwardly from the expander section, extend along the axis of the shank, and are angularly spaced apart from each other. A tubular expansion sleeve is sleeved on a neck section of the shank adjacent to the expander section, and is formed with a plurality of axially extending slits for engaging the longitudinal ribs when the expander section is extended into the expansion sleeve.

Abstract: A screw includes a shank portion and a head portion on one end of the shank portion. The shank portion has a continuous spiral screw thread with a plurality of turns formed thereon. The screw thread has an upper thread surface, a lower thread surface, and a cutting line that interconnects the upper and lower thread surfaces at a radial edge of the upper and lower thread surfaces distal to the shank portion. Each of at least some of the turns of the screw thread is formed with from two to six adjacent concave facets along the cutting line. Each of the concave facets has a radial width ranging from about 60 to 120 degrees. Each pair of the adjacent concave facets forms a pointed corner at the cutting line.

Abstract: A screw includes a shank portion and a head portion on one end of the shank portion. The shank portion has a continuous spiral screw thread with a plurality of turns formed thereon. The screw thread has an upper thread surface, a lower thread surface, and a cutting line that interconnects the upper and lower thread surfaces at a radial edge of the upper and lower thread surfaces distal to the shank portion. Each of at least some of the turns of the screw thread is formed with from two to six adjacent concave facets along the cutting line. Each of the concave facets has a radial width ranging from about 60 to 120 degrees. Each pair of the adjacent concave facets forms a pointed corner at the cutting line.

Abstract: A wedge anchor has a shank with an expander section having a surface that forms an angle greater than 8° with respect to an axis of the shank. A plurality of longitudinal ribs project radially and outwardly from the expander section, extend along the axis of the shank, and are angularly spaced apart from each other. A tubular expansion sleeve is sleeved on a neck section of the shank adjacent to the expander section, and is formed with a plurality of axially extending slits for engaging the longitudinal ribs when the expander section is extended into the expansion sleeve.