Abstract: A skateboard includes a deck with two connection members connected to an underside thereof the deck and two trucks are connected to the two connection members respectively. Each truck has a main body and a transverse tube, and two wheels are rotatably connected to two wheel frames connected to two ends of the transverse tube. A truck spring member is received in each main body and has a first recess with which a protrusion on each connection member is engaged. The truck is rotatable about a first pin extending through the main body and the truck spring member and connected to the connection member.

Abstract: A socket structure includes a main body having an outer wall formed with a driving portion and an indication portion. The driving portion has a plurality of successively and longitudinally arranged teeth. The indication portion provides an indication and identification function, thereby facilitating a user identifying features of the socket structure. A method for manufacturing the socket structure includes the steps of: choosing material, forging, coarse grinding, broaching, turning, rolling, hardening, polishing, surface treatment, and forming the product.

Abstract: A wrench includes a drive head, a drive member, a plurality of locking teeth mounted on either one of the inner wall of the drive head and the drive member, and a locking device mounted on either one of the inner wall of the drive head and the drive member. The locking device includes at least two driving blocks each formed with a locking end engageable with the locking teeth to drive the drive member. The locking ends of the at least two driving blocks are respectively engaged with the locking teeth at different time. Thus, the locking device has a smaller driving angle for driving the drive member.

Abstract: A one-piece filter cartridge is formed by inserting an open ended cylindrical screen and an end screen for the cylindrical screen in a mold and overmolding with engineered resinous material to form spaced annular and axial support ribs for the screen material. The cartridge is suitable for use in an hydraulic circuit for filtering bi-directional and radial flow without backwashing trapped particles from flow in one axial direction. One of the ribs has an annular groove for a seal ring for sealing about the cartridge upon insertion in a flow passage.

Abstract: A skateboard includes a board body having a bottom provided with a base having a bottom provided with two opposite wheel seats. Each of the two wheel seats includes a wheel axle for mounting a roller. The wheel axle of each of the two wheel seats has a center located at a height different from that of a center of the respective wheel seat, thereby forming an eccentric state, so that each roller has independent horizontal and vertical displacement, thereby forming an excellent balance effect, so that the skateboard can be moved in a stable manner.

Abstract: A wrench having a safety device includes a shank, a handle slidably mounted on the shank, and at least one resistance member mounted between the shank and the handle to provide a resistance to damp movement of the handle. Thus, when the force applied on the workpiece is increased, the handle is moved on the shank away from the drive head, so that the resistance member is further compressed, and the force arm of the applied force is increased, thereby facilitating the user operating and rotating the workpiece.

Abstract: An automatically restorable universal connector includes at least two members pivoted with each other, each of the two members formed with a pivot end which is provided with a locking portion; a pivot shaft extended through the two members; and a restoring member mounted between the two members and having two ends each locked and positioned in the locking portion of each of the two members, so that the two members can be restored automatically, thereby facilitating operation of the universal connector.

Abstract: A roller skate includes a fixing seat, a plurality of wheels, and a safety device mounted on the wheel. The safety device includes a safety member mounted on the fixing seat and urged on the wheel, so as to adjust a rotation speed of the wheel. Thus, the roller skate can be fixed on the ground without rotation by the safety device, so that the learner can stand on the roller skate without movement so as to practice his/her balance. In addition, the safety member is slightly loosened from the wheels, so that the wheels are rotated at a lower speed, thereby facilitating the learner practicing the skating skill.

Abstract: A one-piece filter cartridge is formed by inserting an open ended cylindrical screen and an end screen for the cylindrical screen in a mold and overmolding with engineered resinous material to form spaced annular and axial support ribs for the screen material. The cartridge is suitable for use in an hydraulic circuit for filtering bi-directional and radial flow without backwashing trapped particles from flow in one axial direction. One of the ribs has an annular groove for a seal ring for sealing about the cartridge upon insertion in a flow passage.

Abstract: A solenoid valve and manifold assembly for installation on an engine and connecting with hydraulic circuits in the engine for de-actuating the combustion chamber valves of selected cylinders of the engine. A manifold deck is formed with the valving channels and ports therein for connecting to the hydraulic circuits. A gasket is formed with solenoid valve mounting bosses and valving passages as a unitary member and is retained on the manifold deck by a retaining plate preferably stamped from sheet stock with clearance holes received over the valve mounting bosses and secured to the manifold deck over the gasket for sealing the gasket thereon. The valves are inserted in the bosses and retained by a preferably stamped bracket and the bracket, retaining plate and gasket secured to the manifold deck by common fasteners. A common electrical lead frame is received over the valve terminals for making electrical connection to the valves.

Abstract: A solenoid valve and manifold assembly for installation on an engine and connecting with hydraulic circuits in the engine for de-actuating the combustion chamber valves of selected cylinders of the engine. A manifold deck is formed with the valving channels and ports therein for connecting to the hydraulic circuits. A gasket is formed with solenoid valve mounting bosses and valving passages as a unitary member and is retained on the manifold deck by a retaining plate preferably stamped from sheet stock with clearance holes received over the valve mounting bosses and secured to the manifold deck over the gasket for sealing the gasket thereon. The valves are inserted in the bosses and retained by a preferably stamped bracket and the bracket, retaining plate and gasket secured to the manifold deck by common fasteners. A common electrical lead frame is received over the valve terminals for making electrical connection to the valves.

Abstract: A socket structure includes a main body having an outer wall formed with a driving portion and an indication portion. The driving portion has a plurality of successively and longitudinally arranged teeth. The indication portion provides an indication and identification function, thereby facilitating a user identifying features of the socket structure. A method for manufacturing the socket structure includes the steps of: choosing material, forging, coarse grinding, broaching, turning, rolling, hardening, polishing, surface treatment, and forming the product.

Abstract: An automatically restorable universal connector includes at least two members pivoted with each other, each of the two members formed with a pivot end which is provided with a locking portion; a pivot shaft extended through the two members; and a restoring member mounted between the two members and having two ends each locked and positioned in the locking portion of each of the two members, so that the two members can be restored automatically, thereby facilitating operation of the universal connector.

Abstract: A roller skate includes a base for supporting wheels and a support for attaching to a boot. The base includes a hub and a pair of slots. The support includes a pair of extensions extended downward for slidably engaging with the side portions of the base and for guiding and limiting the support to move up and down relative to the base. A shaft is secured to the extensions and slidably engaged in the pair of slots for limiting the up and down movement of the support relative to the base. A spring is engaged between the base and the support for cushioning the support.