The invention relates to a pneumatic tool with a handle (26), valve (22), a safety switch lever (18) arranged on the handle (26) for actuating the valve (22) and a pressure medium connection (16), wherein the valve (22) comprises a valve body (28) movable between a home position and at least one further position, wherein a connection between the pressure medium connection (16) and a pressure cylinder (12) of the tool is interrupted in the home position and the connection between the pressure medium connection (16) and the pressure cylinder (12) of the tool is established in the further position.

It is proposed that the pressure cylinder (12) is vented with the displacement of the valve body (28) to the home position and a pressure applied to the pressure medium connection (16) displaces the valve body (28) toward the home position when the safety switch lever (18) is released.

Modular carriage for varying spacing between ends of polymer pipe during fusion. The modular carriage includes a fixed jaw; an inner movable jaw; an outer moveable jaw and a plurality of guide rods. The fixed jaw being adapted for tool free engagement with the terminal ends of the plurality of guide rods. A carriage cylinder is associated with at least two of the guide rods and mounted for reciprocal travel along the length of its associated guide rod. The movable jaws being adapted for tool free engagement with at least two carriage cylinders for reciprocal travel therewith. A combined hydraulic cylinder/guide rod includes a guide rod with an integral guide rod piston, a cylindrical tube, and a guide rod gland on each end of the cylinder tube.

A clamp apparatus including first and second clamp arms, which are supported rotatably on a body, with a cover being installed to cover outer sides of the body. The cover includes openings through which portions of the first and second clamp arms are inserted and rotatably operated. An unloading tray is arranged in the body at a position below the openings in the direction of gravity. Spatter, which invades into the clamp apparatus from the openings when a welding operation is carried out on a workpiece that is clamped by the first and second clamp arms, is deposited on the unloading tray, and the spatter is eliminated by taking out the unloading tray to the exterior of the clamp apparatus.

A clamping device has a rotatably mounted clamping shaft (2), a clamping element (1), and a control mechanism (3). The clamping shaft (2) is formed from an inner shaft (2.1) and an outer shaft (2.2) that receives the inner shaft (2.1). The outer shaft is connected to the control mechanism (3) to pivot the clamping shaft (2), via a lever arm (5). The inner shaft (2.1) is rotationally connected conjointly to the clamping element (1). The inner shaft (2.1) is fixed in position relative to the outer shaft (2.2) by an adjustment element (4) connected to the inner shaft (2.1).

A one-way oil-way driven expansion and retraction movement tool includes a hydraulic driving structure, two long arm rods and two connecting rods, wherein, the hydraulic driving structure has a cylinder barrel, a plunger and a shaft rod, the two arm rods are opposite each other and are opposite the two sides of the shaft rod in the lateral direction. One end of each arm rod is respectively pivoted on the cylinder barrel, and the other end of each arm rod is respectively used for arranging a working piece, so that each working piece can move toward or away from each other to execute corresponding work. The connecting rods are respectively pivoted with each of the arm rods and with the connecting part, so that, through the connecting rods, the shaft rod can pull the arm rods to move away from each other or toward each other.

A fixture clamp adjustment system includes a test workpiece and an alignment block. The test workpiece has a load cell and is configured to nest upon a fixture that has a clamp such that the load cell aligns with the clamp when open and such that the clamp contacts the load cell when closed. The alignment block is configured to couple with the clamp and engage the test workpiece when the clamp is closed to maintain clamp and load cell alignment.

The present invention provides an improved release mechanism for clamping tools where problems of thread slipping due to worn out thread can be reduced by the structure of a plunger with a small diameter section and the engagement of the thread shaft is made more secure by the cam action on account of the shape of the plunger. A protrusion extends from a push button on a top portion of the half-threaded nut. Threads are formed on an upper portion of the hole for engaging the threaded shaft. The middle portion of the plunger is made to have a section of small diameter allowing the protrusion to be pushed downward in a normal position and allowing the protrusion to rely on the resilient power of the helical spring to push it upward into the small diameter section.

This invention comprises a self-centering mechanism for retaining an object, a clamping device for retaining an electronic device or an electronic device in a case, and means to integrate the devices in an adapter form. The structure of the self-centering mechanism allows for a compact device that is capable of fitting a wide range of differently sized and shaped objects. The clamping device allows for means to retain an electronic device or an electronic device in a case that is capable of fitting a wide range of differently sized and shaped electronic device. The self-centering mechanism and clamping device can also be integrated into the form of an adapter for various applications.

The present disclosure provides a fixture for fixing a steering knuckle in a machining process, the fixture comprises a bottom plate, wherein the bottom plate is machined with two bottom plate windows that are configured to accommodate machined parts of the steering knuckle; three groups of pressure claws and three groups of locating pins are fixed on the bottom plate, and the pressure claws and the locating pins are respectively fixed to the through holes of the bottom plate; and the three groups of pressure claws are respectively arranged at three vertexes of a triangle.

An electric clamp apparatus includes a body, a rotary drive unit which is driven rotatably by an electric signal, and a rotary body rotated under a driving action of the rotary drive unit. Gear teeth of a clamp arm are enmeshed with helical screw grooves formed on the outer circumferential surface of the rotary body. The rotary body is rotated by driving the rotary drive unit, whereby the clamp arm, which is enmeshed with the screw grooves, is rotated through a predetermined angle to bring about a clamped state for clamping a workpiece.