Abstract: A selective one-way wrench includes a head, a rotor, a switch, a pawl and a torque spring. The head includes a first cavity defined therein, a second cavity in communication with the first cavity, and a third cavity in communication with the second cavity. The rotor is rotationally placed in the first cavity and formed with a gear. The switch includes a body pivotally inserted in the third cavity, a recess defined in the body, and a bore in communication with the recess. The pawl is movably placed in the second cavity and formed with a plurality of teeth engaged with the gear and a groove defined therein. The torque spring includes a helical portion placed in the recess, a first rectilinear end extending into the groove from the helical portion, and a second rectilinear end extending into the bore from the helical portion.

Abstract: Disclosed is a method for marking a socket. The method includes the steps of providing a socket, making at least one indented mark in the surface of the socket, executing a heat treatment on the surface of the socket, providing at least one colored layer in the indented mark, providing an electroplated layer on the surface of the socket except the colored layer, removing a portion of the electroplated layer from the surface of the socket to form an exposed portion of the surface of the socket, and providing a black-dyed layer on the exposed portion of the surface of the socket. The heat treatment can be executed after the colored layer is provided.

Abstract: A detergent-recycling apparatus includes two containers. The first container includes two inlet ports, an outlet port and a drain valve. The first inlet port allows pressurized air to travels into the first container. The second inlet port allows detergent and contaminants to travel into the first container. The drain valve releases the contaminants from the first container. The second container includes an inlet port and an outlet port. The inlet port of the second container is connected to the outlet port of the first container to allow the pressurized air to carry the detergent into the second container from the first container while the contaminants deposit in the first container. The outlet port releases the detergent as well as the pressurized air from the second container.

Abstract: A method is disclosed for marking a tool. The method includes the steps of providing a tool, providing a rustproof layer on the tool, providing a printed layer on the tool, and providing at least one electroplated layer on the tool. The step of providing the rustproof layer includes the step of electroplating or hot-dip galvanizing the tool. The thickness of the electroplated layer is larger than or identical to that of the colored layer.

Abstract: A method is disclosed for marking a tool. The method includes the steps of providing a tool, cleaning the tool, providing a printed layer on the tool, and providing at least one electroplated layer on the tool. The step of cleaning the tool includes the step of providing an air blast over the tool. The step of providing the air blast includes the step of providing an air compressor for producing the air blast. The step of providing the air compressor includes the step of providing an electrostatic dust gun that produces ions in addition to the air blast so that the ions neutralizes static charges on the tool as the air blast sweeps the tool.

Abstract: A method is disclosed for marking a tool. The includes the steps of forming a tool, making an indented mark in the tool, hardening the tool, coloring the tool to provide a color layer on the tool in and near the indented mark, clearing the tool of redundant colorant that overflows from the indented mark, black dying the tool to provide a black-died layer on the tool except the indented mark, and providing a transparent layer on the protection layer except the mark. The thickness of the transparent layer is larger than the thickness of the mark.

Abstract: There is disclosed a method for marking a tool. The method includes the steps of forming a tool, hardening the tool, trimming the tool, providing the tool with a protection layer, printing the tool with a mark, and providing a transparent paint layer on both of the protection layer and the mark.

Abstract: A method is devised for providing a code on a tool. The method includes the steps of providing a tool, providing a coating on the tool by electroplating, and providing a code on the coating by using laser to make dents in the coating, with patches left in the coating. The dents are used as black lines or dots of a bar or array code printed on paper while the patches are used as blank lines or dots of the bar or array code printed on the paper.

Abstract: A simple and inexpensive method is devised for marking a tool. In the method, a tool is provided. Then, a coating is provided on the tool. Then, a printed layer is provided on a portion of the coating. Finally, a protective layer is provided on at least the printed layer.

Abstract: A selective one-way wrench includes a head, a rotor, a switch, a pawl and a torque spring. The head includes a first cavity defined therein, a second cavity in communication with the first cavity, and a third cavity in communication with the second cavity. The rotor is rotationally placed in the first cavity and formed with a gear. The switch includes a body pivotally inserted in the third cavity, a recess defined in the body, and a bore in communication with the recess. The pawl is movably placed in the second cavity and formed with a plurality of teeth engaged with the gear and a groove defined therein. The torque spring includes a helical portion placed in the recess, a first rectilinear end extending into the groove from the helical portion, and a second rectilinear end extending into the bore from the helical portion.

Abstract: A method is provided for marking a tool. The method subsequently includes the steps of hardening the surface of the tool, making inscription in the surface of the tool, filling colorant in the inscription, clearing the surface of the tool of an excessive portion of the colorant placed outside the inscription, and electroplating the surface of the tool.

Abstract: A worktable apparatus includes a worktable, a washing unit and a supporting unit. The worktable includes a horizontal board supported on posts. The washing unit includes a sink and a valve. The sink includes an opening defined in an upper portion and a drain defined in a lower portion. The valve is connected to the sink so that the drain is in communication with and under control of the valve. The supporting unit includes two rails, a tray and casters. The rails are connected to the worktable under the sink. The tray is placed between the rails. The casters are divided into two groups each connected to a respective one of two lateral edges of the tray and movably supported on a respective one of the rails.

Abstract: A tool stand includes a base, a post rotationally supported on the base, at least two trays rotationally supported on the post above the base, small wheels connected to the base, and large wheels connected to the lowermost one of trays so that the large wheels do not interfere with the rotation of the base relative to the post.

Abstract: Disclosed is a method for marking a socket. The method includes the steps of providing a socket, making at least one indented mark in the surface of the socket, executing a heat treatment on the surface of the socket, providing at least one colored layer in the indented mark, providing an electroplated layer on the surface of the socket except the colored layer, removing a portion of the electroplated layer from the surface of the socket to form an exposed portion of the surface of the socket, and providing a black-dyed layer on the exposed portion of the surface of the socket. The heat treatment can be executed after the colored layer is provided.

Abstract: Disclosed is a method for marking a tool. The method includes the steps of providing a tool, executing heat treatment on the tool, providing a ground layer on the tool, printing the tool, and electroplating the tool. In the step of printing the tool, a paint layer is provided on the ground layer. The paint layer includes at least one identification unit. The identification unit includes at least one identification zone provided with paint, a background provided around the identification zone and clear of any paint, and a borderline provided around the background and provided with paint. In the step of electroplating the tool, a coat is provided on portions of the ground layer that are not covered by the identification zone and the borderline. There is sharp contrast of the coat against the paint layer.

Abstract: Disclosed is worktable apparatus on which cleaning can be executed. The worktable apparatus includes a worktable, a washing unit and a supporting unit. The worktable includes a horizontal board supported on posts. The washing unit includes a sink and a valve. The sink includes an opening defined in an upper portion and a drain defined in a lower portion. The valve is connected to the sink so that the drain is in communication with and under control of the valve. The supporting unit includes two rails, a tray and casters. The rails are connected to the worktable under the sink. The tray is placed between the rails. The casters are divided into two groups each connected to a respective one of two lateral edges of the tray and movably supported on a respective one of the rails.

Abstract: A method is disclosed for marking a tool. The includes the steps of forming a tool, making an indented mark in the tool, hardening the tool, coloring the tool to provide a color layer on the tool in and near the indented mark, clearing the tool of redundant colorant that overflows from the indented mark, black dying the tool to provide a black-dyed layer on the tool except the indented mark, and painting the tool to provide a transparent paint layer on the tool for glistering and rust-prevention.

Abstract: A tool stand includes a base, a post rotationally supported on the base, at least two trays rotationally supported on the post above the base, small wheels connected to the base, and large wheels connected to the lowermost one of trays so that the large wheels do not interfere with the rotation of the base relative to the post.

Abstract: A tool stand includes a cabinet, two posts, at least one tray and at least two collars. The posts are supported on the cabinet. The tray includes a wall extending thereon and two arched slots defined therein. Each of the collars is movably supported on a related one of the posts and formed with a pin inserted in a related one of the arched slots so that the tray can be pivoted between a horizontal position and a tilted position.